The output voltage of controller exerts an influence on thermal resistor so as to change gain characteristic in regulation circuit, thus the transmission levels being stabilized.
通过导频控制器的输出电压控制热敏电阻，从而改变调节网络的增益，达到稳定传输电平的目的。
This situation can arise, for example, when a transconductance amplifier feeds an output current i0 to a load resistor RL, but the overall circuit is considered to give a voltage gain VL/Vi.
例如当一个互导放大器提供一输出电流i0到负载电阻RL，而全部网络给出电压增益为VL/Vi时，就可出现这种情况。
Voltage gain by external resistor Rf and Rin the ratio of the decision.
电压增益由外接电阻Rf与Rin的比值决定。
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