impedance

The path isolation for a matrix card is the impedance from the HI and LO terminals of one path to the HI and LO terminals of any other path.

What sort of impedance mismatches are between them.

The data bus must go into a high-impedance state at least one cycle before output of the latest data.

Since the secondary winding is normally operated into a high-impedance circuit, the secondary current is quite small.

From this point impedance checks are continuous, the device only allows shock in case of acceptable satisfactory impedance.

By sticking PZT onto the surface of the structure to be tested and employing piezoelectric impedance technology.

At the point where the capacitor impedance equals the resistor, the gain of the entire circuit begins to fall off toward a gain of one.

Unless the averaging value of the cable's characteristic impedance is very close to the system's impedance or SRL always is better than RL.

It is possible for the feed system to have a low impedance, looking downstream from the pressure source at a certain frequency.

Due to its robustness to non-normal distributions and outliers, the median was used to estimate the impedance amplitudes.

The structures perform similarly to an object covered with the surface impedance.

The Wheatstone bridge is most sensitive to small fractional impedance changes in one of its arms when all the arms are the same impedance.

SPD that it shows high impedance when there has no surging, and becomes low impedance while surging voltage occurs .

Precise impedance analyzer HP4294A has been used for experiment research on beams, slabs and 3 floors of steel frames.

The aim of this study was to determine the optimal impedance range required during RF excitation based on an assessment of image quality.

These gas sandstones have better anomaly pattern only when the gas volume has been up to a given size, due to their low acoustic impedance.

None of the surveyed materials were found to be suitable for use as impedance matched specular radar absorbers.

Objective: To understand the reliability of multifrequency segmental bioelectrical impedance analysis in measuring physical performance.

In DC coupled applications, input impedance is not as important as input current and its voltage drop across the source resistance.

The finite dynamic element of triangular bending plate is expressed in frequency expansion form of a single impedance matrix.

The "matched wave impedance" approach was assumed, although none of the published Chinese materials possessed the required properties.

For the shallow defect, the size of the defect could be estimated by reflecting coefficient, whose impedance is not considered.

It has been a new technology in recent 20 years to measure the body component by using the bioelectrical impedance analysis (BIA).

In the electrical equipment and radio roads that are commonly used for lifting voltage and impedance matching.

This paper established the overall design scheme for the system after analyzing the impedance characteristics of piezoelectric transducer.

In particular, multiple capacitors of different values may be connected in parallel to provide low impedance over a wide frequency range.

Ideally, when a voltmeter is connected to a relatively low impedance circuit in which no voltages are present, it should read zero.

An virtual electronic automatic matching system was designed, used for RFID antenna impedance.

The phenomenon of arc starting will occur easily when high impedance coating occurs on the surface of aluminium alloy sample.

Hibernate is a scheme of data persistence used to solve the "impedance mismatch" between the relational model and the object model.

The primary errors caused by an impedance mismatch are the frequency response and amount of squarewave ringing.

The impedance of coax-fed arbitrary shape microstrip patch antenna is investigated by the moment method.

The Ansys software was used for simulating the 3D electric field distributions of the impedance sensor in stratified flow.

Its impedance bandwidth for the two operating frequencies can be further enhanced by increasing the width of the longer monopole.

The guard can be used to isolate the high impedance input lead of the ammeter from leakage current due to voltage sources.

FTIR, TEM, AC impedance were used to investigate the electrolyte and relationship between ionic conductivity and inorganic oxide particles.

The individual fuel cell is controlled based at least in part on the impedance characteristic.

The equivalent circuit can be used to calculate the input equivalent impedance and the voltage transfer functions of the windings .

The two-microphone method is investigated for the objective of in situ measuring the impedance of an acoustic liner in a duct.

Some RS-485 Transceivers modify the input impedance to allow up to 8 - times more nodes to be connected to the same bus .

Results The original blocky images of electrical impedance tomography by the triangle elements can be transformed into smoothing images.

The discharge gap voltage is represented in terms of Fourier transform , the equivalent impedance of DBD discharge gap is available.

Any offset current flowing through a high impedance device will cause an unwanted voltage to appear across the device.

Impedance between the phase terminals in the two-port network equivalent to a given network component.

The insertion tip may be arranged to match the impedance of the coaxial antenna to a predetermined tissue impedance.

Multi-resonator broadband transducer was processed and its impedance characteristic and transmitting voltage response were tested.

The unionize control of position and force can be realized by impedance control, which is one of main compliant force control theory.

Refer to the electrometer's manual or specifications for the value of the feedback impedance for a particular instrument.

The types of switch cards and the techniques used in these applications will depend on the magnitude and impedance of the voltages switched.

High-temperature superconducting thin films' microwave surface impedance is an important parameter in judging quality of the film.

The invention relates to a method for detecting bacteria by using the electrochemical impedance principle and a microfluidic chip.

As expected, if simulations are run assuming the presence of a low impedance remote termination, the results degrade significantly.

The impedance matching circuit includes a first pull-down resistance unit, a first pull-up resistance unit, and a code generation unit.

In addition, SOFC impedance models were analyzed and compared completely and systematically in terms of the application properties.

Unfortunately, the impedance matching between WSDL2Java and XJC is not always perfect, and that leads to some problems.

The wave polarization and impedance characteristics in the near field of combinations of an electric and a magnetic Hertz dipoles .

The device is insensitive to voltage drops over long lines due to its high impedance current output.

The instruments used to make these high impedance measurements include electrometers, picoammeters, and source-measure units (SMUs).

The headphone impedance plot is a measure of the dynamic resistance in ohms of the headphones over the entire audible frequency range.

This type of antenna measurements can be translated into measuring the input impedance of two-port network.

Instrumental amplifiers with high input impedance, high CMRR and low drift are widely used in the small signal amplifying field.

The influence of leakage impedance ATs on the performances of electric traction networks can be simulated with the proposed algorithm.

Wave impedance and firmness coefficient can be used to describe the rock blastability simply and effectively.

The new test is applied to two-dimensional histograms of movement vectors derived from electrical impedance images of the stomach.

With the special power channels, including noise interference characteristics, impedance variations, multipath fading.

The frequency response will be good as well, since there is no loss in effective impedance at low frequencies.

A real-world voltage source has a very low, but non-zero output impedance: often much less than 1 ohm.

Line impedance stabilization network LISN as an important test equipment, is the focus of this study.

The cyclic voltammetry, galvanostatic charge-discharge and AC impedance have study the performance of its super-capacitance.

The impedance matching and the noise matching must be considered when designing a wideband low noise amplifier(LNA).

ACOUSTICS. TESTING OF ARCHITECTURAL ACOUSTICS. DETERMINATION OF SOUND ABSORPTION COEFFICIENT AND IMPEDANCE IN A TUBE.

The results show that the stress-impedance effect increases with the increase of the thickness of the ferromagnetic layer and metal layer.

The actual signal distortion levels depend upon input and output signal amplitude, as well as the output load impedance.

Both of these issues effect the impedance characteristics of the cabling.

Extracellular volume and its changes were measured by electrical impedance method with the fourth electrode scheme.

In this state resistance is zero, which means the superconductor impedance is negligible and does not interfere with steady state operation.

High vertical resolution impedance can be obtained by seismic stochastic inversion which is not limited by the bandwidth of seismic data.

It is mainly explained by continuous cement hydration. Warburg impedance is found gradually in the next immersion process.

The corrosion resistances of the coatings were studied by polarization curves and electrochemical impedance spectroscopy.

A logic family that may be in one of three states rather than the usual two-high, low, or high impedance .

Based on the analysis of a circuit including power supply, the best impedance matching conditions were derived by the theory.

The sensor's input impedance is tens of gigaohms, so the act of taking a measurement does not throw off the quantity being measured.

The variation of the wire impedance and correlated parameters during WESC process is in-depth researched.

The major advantage of MREIT is the high impedance resolution imaging and improvement of the ill-posed problem in conventional EIT.

Encephalic tissues impedance is the main parameter of encephalic tissues electrical characteristics.

In these cases, coaxial connector adapters may be applicable, providing they offer proper performance and impedance matching.

A set of practical formulas is summarized for calculating the impedance and resistance components of trapper.

Wheatstone bridge has a "generator" , four impedance "arms" , and a "detector" .

Also, a patterned electrically conductive back plane may be provided in the laminate to better control the trace characteristic impedance.

The designing method of a portable electrical bio-impedance measurement system is introduced.

This test checks for proper connection, impedance balance between the phases and minor or impending short circuits in the windings.

The so-called equivalent (harmonic) impedance of the Thevenin's circuit of a single-phase transformer is also discussed.

The electrochemical impedance spectra changes with extended time clearly. Capacitive impedance increases in early immersion period.

Signal channel consists of attenuating circuit, impedance transformation circuit and amplification circuit.

Detectors with high impedance have higher thermal noise and time constant, should be used with an amplifier with high input impedance.

An apparatus includes a power supply having an energy transfer element and a shield impedance.

This paper introduces the checking current for transformer with current comparator, analyses the additional impedance of current comparator.

P-impedance is partly superimposed in sandstone and mudstone in Chunxiao field due to hole washout at part of mudstone intervals.

Enumeration of presumptive Escherichia coli in live shellfish - Indirect technique using direct impedance measurement.

Application of PC based instrument for ground impedance measurement can overcome the shortcomings in traditional voltage drop measurements.

This paper is to design a current-mode multi-frequency impedance exciting source which adopts direct digital synthesis technology.

Anomaly An impedance discontinuity causing an undesired signal reflection in a transmission cable.

Switching applications of high impedance circuits include low current, high resistance, and high impedance voltage applications.

Under high voltage testing procedure, the impedance characteristic of the terminal of the under-test device is similar to capacitance.

General Electrometer Considerations: A discussion of techniques and error sources that affect high impedance measurements in general.

The extraordinarily important role of electrochemical impedance spectroscopy (EIS) was emphasized.

All paths through a system must be terminated with their characteristic impedance.

Firstly, impedance matrix interpolation is incorporated in MoM in combination with the preconditioning technique.

A new method of lithology parameter extraction is presented in terms of elastic wave impedance.

Their impedance varied; headphones used in telegraph and telephone work had an impedance of 75 ohms.

Directional impedance relays (mho relays) are frequently used in high-voltage power systems.

The apparatus may include an impedance tuner to dynamically match the impedance of the needle with tissue at the insertion tip.

Secondly, the calculating of electromagnetic problem using MoM is mainly reflected in filling impedance matrix and solving linear equations.

Low voltage and low resistance measurements are often made on devices and materials with low source impedance.

Such a theoretical device would have a zero ohm output impedance in series with the source.

It has been studied both numerically and experimentally for its impedance bandwidth, radiation patterns and gain.

This investigation deals with the formation mechanism of tantalum anode oxidation membrane. Base on the alternating impedance.

Results Certain parameters about frequency spectrum of body bio-electrical impedance changed obviously through exercise.

The electrochemical kinetic analyses of these processes are based on quasi-steady-state polarisation and impedance data.

In the case of the conveying assembly according to the invention, the impedance of the contact-making is reduced.

Nonetheless, Jobs said, "This is life in art phone world, " ignoring the difference between the absorption and impedance match problems.

These devices are up to 14 bit accurate with low aperture jitter and output impedance.

The advantages of the technique on discriminating defects on the basis of impedance diagram and phase analysis were testified.

The performance of the impedance transformer by this methods design is simulation analyzed.

Logic in a high impedance state may be easily and permanently connected to a bus.

Finally I got the spare piezoelectric transducers and finished some simple high-impedance signal amplifiers.

In broader terms, the source impedance should be large compared to the feedback impedance of the meter.

the antenna system has a good characteristic with wide symmetrical beamwidth , broad impedance bandwidth and compact structure.

The reason is spot welding process imposes better connectivity and thus reducing the contact impedance leakage current significantly.

Because GUARD is driven from a low impedance source, the leakage from GUARD to system common is not a problem.

An alternative method of determining the site impedances is to calculate an impedance estimate for each time-frequency element.

and an impedance matching terminal electrically coupled to the stub and to a ground.

It shows that, dispersion property weakens and interaction impedance increases as the pitch L decreases.

When matched with low - impedance rectifier transformer, the whole set is composed of control cabinet, reactor and rectifier transformer.

By definition, a guard is a low impedance point in the circuit that's at nearly the same potential as the high impedance input terminal.

Node impedance matrix method and node admittance matrix method are 2 most popular methods used in short circuit current calculations.

The tag IC is fed by embedded microstrip feed line and T-shape impedance-matching network is used for impedance matching.

The effect of additional Ce and Y in Pb-Ca and Pd-Sb alloy were studied by means of cycle voltammetry and AC impedance.

Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.

MEASUREMENT OF AIR HUMIDITY. IMPEDANCE VARIATION HYGROMETER (CAPACITIVE AND RESISTIVE).

Meanwhile, it has been indicated that QP calculated is inaccurate by using traditional equivalent impedance theorem.

This paper makes a study on principles of grounding impedance measurement and derives the formula for calculating grounding impedance.

High impedance and EMI suppression effective over a wide frequency range.

Impedance is a measure of electrical resistance that captures the effects of this feedback.

From those, we also obtain the distributing of field, dispersive function, and coupling impedance of rectangle grating structure.

Eddy current basis of theory of measurement is introduced, and brings forward impedance analytical method of eddy current.

The results show that the new type accelerating cavity has relatively high effective shunt impedance and quality factor.

In that case we need a transformer which transforms this high impedance down to the impedance of the used loudspeaker.

The performances of impedance and transmitting voltage response of the transducer are analyzed.

The measuring element, which is the center of distance protection, calculates the line impedance between the fault point and relay point.

Using seismos and well-logging union wave impedance inverse technology forecast reservoir plane distribution.

Detection circuit use impedance - voltage transformation method to detect changes in eddy current probe impedance.

Low impedance - enhances load handling when put in paralleled with a battery.

This means that high-speed, high-level circuits can "talk to" low-levelcircuits through the common impedance of the negative supply LINE.

A real-world current source has a very high, but finite output impedance.

The shape and delay of the reflection(s) contain information about where various impedance mismatches occur.

In design of impedance spectroscopy database frame, ActiveX Data Object(ADO)technique is adopted to improve the agility and efficiency.

So it has the important practical significance to realize the battery impedance on-line and real-time measurement.

The change range of magneto-impedance enhances with the increase of frequency, magnetic field intensity and ribbon.

Any of various instruments for meASuring or comparing the characteristics, such AS impedance or inductance, of a conductor.

The mathematic and physical impedance matching models of transmission line and the impedance computing formulas are also pointed out.

These devices have an active-high output enable that when driven to a low level, places the output in a high-impedance state.

The interactions of Meldola s Blue(MB) and DNA were studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).

and adjusting a value of a shield impedance to substantially reduce the noise current.

Generalized impedance boundary conditions are employed to simulate the effect of the earths surface on electromagnetic fields.

High output current capability allows low impedance loads to be driven.

Gold-plated: improve conductive contact impedance improve signal transmission.

All long analog traces are very low impedance, and are fully shielded in 3 dimensions by surrounding the trace on 4 sides with a shield.

After analysis of arc furnace of constant impedance electrode control method, a method for PID optimization of parameter is proposed.

The pacing system malfunction can be detected by analyzing pacing ECG and the pacing system impedance.

Effects of surface impedance characteristics of the structure on the two sides are different.

Impedance analytical method is presented, through which we analyze some factors that alter testing coil impedance's value.

Objective To evaluate the non-invasive cardiac output measurements by electric impedance in critically ill patients.

Taking geometric figure, plural layers impedance to design for electromagnetic wave absorb effect explore.

A guard is a low impedance point in the circuit that's at nearly the same potential as the high impedance lead being guarded.

In package of uncontrolled-impedance, reflection noise may cause the whole interconnects package design failure.

It is determined the magnesium corrosion property of aviation lubricating oil by wet heat test and electrochemical impedance spectroscopy.

In this paper, we present the analysis of multifurcated waveguides by the transmission line model and impedance transformation technique.

Through numerical simulation, a research is taken on the impedance, gain, radiation plot of the antenna.

Conclusion It solved the problem of removing respiratory interference from lesser circulation impedance. . .

ELECTRIC RESISTANCE WELDING. LOW IMPEDANCE CABLES. SIZES, SPECIFICATIONS AND TESTS.

The experiment results show that the impedance bandwidth reaches 89%, and appear good radiation properties in the whole working bandwidth.

The dotted line connecting the tops of the two capacitors represents the low coil impedance to AC signals.

The design of PLL, AGC, IQ and impedance mATched parts are analyzed. The implement of the circuit and the test result are provided.

The present invention relates to a system and method of inductively measuring the bio-impedance of a conductive tissue (106).

Electrical loads can be of three types: impedance load, AC voltage sink load or AC current sink load.

A cascade DC-DC power is tested by voltage disturbance injection, and the impedance criterion is verified effective for stability analysis.

CIMS is a measurement equipment designed to measure Characteristic Impedance of printed circuit board.

Motivated by this, we present in this thesis the considerations and design of implantable stimulator and impedance measurement system.

Gastric impedance signal was obtained by eliminating the respiration impedance and blood impedance.

A low-cost bio impedance measurement system was developed for the increasing household health care market.

Firstly, the effect of torque applied to bolt on impedance curves of host structure was experimentally investigated.

The palladium plating nickel: improve conductive contact impedance improve signal transmission, wear resistance than jinjia.

The equipment mostly check up background currents, leakage-current, dynamic impedance and C-V characteristic etc.

The experimental result shows the resonance behavior of the impedance curves is prominent.

If there is no water in the cavity, the anomaly would appear as a closed circle with high impedance in the 2D resistivity image.

The dispersion characteristic, the synchronous voltage and the interaction impedance of this S-band CCTWT are measured.

A new image reconstruction technology-Electrical Impedance Tomography (EIT) is presented.

The tester is using impedance-phase angle method and combining with the fill-up counting method to measure L, C and R respectively.

Shielding usually implies the use of a metallic enclosure to prevent electrostatic interference from affecting a high impedance circuit.

The polarization impedance decreased firstly and increased later with inoculating time.

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 805 : characteristic impedance.

In the near field, a high impedance appears on a plane perpendicular to a straight line current.

Also, the design above have been slightly altered - the high impedance output have been taken away.

And, at time of device implantation, pacing impedance, R wave amplitude, pacing threshold were comparable in the RVOT and RVA.

Thirdly, LO is assumed to have zero impedance through the card.

Shielding is required because high impedance circuitry is susceptible to pickup of spurious radiated noise.

The lower you go with the volume, the lower the output impedance of you system becomes and the wider the bandwidth.

A meander-line loaded RFID tag antenna is proposed, which can adjust linearly impedance of antenna to match the RFID chip impedance.

On inversion sections, beneficial reservoirs have low-to-moderate impedance and moderate density.

Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 2 : transfer-function method.

Design and Implementation of Electrical Impedance Tomography System.

During a READ operation, When this command is issued, data outputs are disabled and become high impedance after two clock delay.

The switch impedance may be provided during calibration using a reference load.

The resulting speed-up comes from the reduction of the input impedance of the picoammeter due to negative feedback.

This paper proposed an improved immune genetic algorithm (IGA) and applied into wave impedance inversion.

However, the subject matter is interesting and topical and the impedance plots are quite good.

The output of the circuit was push-pull structure in order to reduce the output impedance and speed up the load of the driving voltage.

Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 1 : method using standing wave ratio.

According to the electric parameters, the influence of the resonator structure on the equivalent impedance was analyzed.

In this paper, the equivalent cylindrical conductor model has been proposed to calculate transient impedance of track circuits.

Use Comprehensive well and geological constrained seismic inversion technology to make the wave impedance profile.

The establishment of the impedance function is a key to the traffic distribution.

Results from a preliminary design indicate that high-homogeneity, low-impedance, well-shielded coils result from this design approach.

Meanwhile, the impact of fluid with different proper- ties on reflectivity and wave impedance was discussed.

The variable impedance may be controlled by a user to tune to the channel.

A new three element method for investigation of electrical impedance characteristics of blood is proposed.

The impedance spectroscopy of sandstone was tested at different physical states by CHI600A electrochemical workstation.

In parallel with this semiconductor element, a current limiter impedance is connected.

Examples of impedance load are electromagnetic ac relays. electromagnetic pick up and lift equipments.

It uses the L (inductance) and C (capacitance) of the trace to calculate the resultant impedance.

Objective To evaluate how skull exert influence on brain electrical impedance tomography(EIT).

The proper optimization of the gain and input impedance of an antenna is discussed in the view of practice.

First multi-scale decompositions are carried out for impedance curves and the spectra of the data is analyzed.

An electrical signal is generated by a preamplifier or impedance converter.

The conclusion indicate: the variety of impedance is proportional to the wave amplitude.

Through curve fitting and synthetic asymptotic, this article has obtained the characteristic impedance formula of L-SIAD microstrip line.

Under these circumstances, impedance monitoring may obviate the need for bile acid reflux testing.

Grade and give a summary chart to the typical measured curve that caring resistance information and impedance values.

This is called an impedance discontinuity or an impedance mismatch.

In the experiments, the relationships between impedance and time, voltage drop and time, were obtained.

The ridge regression method is applied to impedance inversion.

A newly solution of measuring RFID chip's encapsulated impedance is studied too for further system design job of RFID tag.

In particular, the numerical results show that the value of impedance of lining wall has a marked effect on the aero-elastic stability.

Signal energy is also lost when it leaks through the insulation of the cable and by impedance caused by defective connectors .

A solution for impedance measurement with four-electrode is designed here according to the requirements of liquid impedance measurement.

Low impedance and balanced output allow interference free performance even with long cable runs.

This paper designed a new type of muffler for pneumatic rock drill with the theory of impedance.

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807 : transfer impedance.

In acoustics, the product of velocity times density, also called acoustic impedance and symbolized by Z.