High frequency reaction control electric circuit
Ling Li
0301 Electronic information
Abstract: Plant in the Communications Today system and the electronic installation, in order to enhance their technical performance target, or realizes certain specific requests, widely uses each kind of reaction control electric circuit. The negative-feedback amplifier is the feedback circuit typical example.The amplifier output signal feeds back through the negative feedback network to its input end, cancels with the input signal, by now, amplifier net input signal difference of for original input signal and the feedback signal,causes the actual input signal to reduce, thus reduced the amplifier output voltage, causes the output voltage scope maintenance to be invariable, then enhanced the electric circuit stability.
Key words: Modulation;demodulation;frequency division;frequency multiplication; frequency