ACTIVE CORRECTOR OF AMPLITUDE-FREQUENCY DISTORTIONS Russian patent published in 1997 - IPC

FIELD: radio engineering; correction of amplitude-frequency distortions in microwave channels. SUBSTANCE: corrector has microstrip line whose first end functions as input and second one, as output of corrector; transistor connected in series with this line uses common-emitter circuit arrangement. Transistor emitter is grounded through feedback resistor and connected to half-wave stub through coupling capacitor; stub is loaded into varactor diode whose cathode is connected to first lead of first choke. Second lead of first choke is control voltage input, this voltage determining corrector tuning frequency. Transistor base is connected through second choke to common point of first and second resistors which form voltage divider. Transistor collector is connected through third choke and resistor to supply voltage. Capacitors connected in series with microstrip line are used for DC isolation of corrector input and output. EFFECT: improved gain at corrector tuning frequency. 1 dwg