It lists and analyzes the operating principle and application of the single diode, double diode and single GaAs FET linearer and finds that they are all inconvenient to be adjusted.

Objective: Adopting quantified index to observe and analyze the effect of acute and chronic pain through double-wavelength diode laser.

A new approach to improve the high-voltage vertical double-diffused MOSFET (VDMOSFET) body-diode recovery speed is proposed.