Transistor frequency converter providing neutralization of degenerating impedance elements

Claim 1

A FREQUENCY CONVERTER CIRCUIT ARRANGEMENT COMPRISING A PAIR OF TERMINALS, A SIGNAL PATH CONNECTED BETWEEN THE TERMINALS INCLUDING MUTUALLY IN SERIES A HETERODYNE SIGNAL INDUCTIVE COUPLING NETWORK, A RESISTOR-CAPACITOR COMBINATION, A PAIR OF ELECTRODES OF A TRANSISTOR, A FEEDBACK COIL AND AN OUTPUT CIRCUIT INCLUDING AN INDUCTANCE AND A CAPACITANCE TUNED TO INTERMEDIATE FREQUENCIES; HETERODYNE SIGNAL MEANS FOR PRODUCING A SELF-OSCILLATING FREQUENCY SIGNAL INDUCTIVELY COUPLED TO SAID HETERODYNE SIGNAL COUPLING NETWORK AND SAID FEEDBACK COIL; AN OUTPUT SIGNAL MEANS INDUCTIVELY COUPLED TO SAID OUTPUT CIRCUIT FOR PRODUCING AN OUTPUT SIGNAL OF AN INTERMEDIATE FREQUENCY, A POTENTIAL DIVIDER ALSO CONNECTED ACROSS SAID PAIR OF TERMINALS; INPUT SIGNAL COUPLING MEANS CONNECTED BETWEEN AN INTERMEDIATE POINT OF SAID POTENTIAL DIVIDER AND ANOTHER ELECTRODE OF SAID TRANSISTOR; AND POSITIVE FEEDBACK PATH MEANS CONNECTED FROM SAID OUTPUT SIGNAL MEANS TO SAID INTERMEDIATE POINT OF THE POTENTIAL DIVIDER FOR NEUTRALIZING THE DEGENERATIVE EFFECT OF SAID RESISTOR-CAPACITOR COMBINATION TO IMPROVE THE GAIN AT INTERMEDIATE FREQUENCIES AND IMPROVE THE CONVERSION GAIN OF THE CONVERTER AT HIGH FREQUENCIES.