The active filter acts as an infinite impedance to the external for the fundamental frequency and as a lowresistor for harmonic frequencies.
对外电路而言，在基波频率下有源滤波器被控制为无限大阻抗，在谐波频率下被控制为小电阻。
2
SB2014 Heavy Current Precision lowResistor is made of delicate materials, which has low temperature coefficient, high resistance rate, and high stability.
SB2014型精密大电流低阻箱采用温度系数低、阻率大、定性高的材料精制而成。
3
Only one high-quality resistor in the signal path and using the Swiss made precision attenuator with gold contacts for low contact resistance and longtime durability.