Frequency doublers employing diode bridge and phase shifter circuit at the input
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1. A FREQUENCY DOUBLER COMPRISING FOUR DIODES COUPLED TOGETHER IN SERIES IN THE SAME POLARITY IN A CLOSED LOOP, TWO IMPEDANCES COUPLED TOGETHER IN SERIES ACROSS AN ADJACENT PAIR OF SAID FOUR DIODES, A TAPPED IMPEDANCE COUPLED BETWEEN THE JUNCTION OF SAID ADJACENT PAIR OF DIODES AND THE JUNCTION OF THE OTHER PAIR OF SAID DIODES, INPUT MEANS FOR APPLYING AN INPUT SIGNAL BETWEEN THE JUNCTION OF SAID ADJACENT PAIR OF DIODES AND THE JUNCTION OF THE OTHER PAIR OF SAID DIODES, PHASE SHIFTING MEANS CONNECTED TO SAID INPUT MEANS FOR PRODUCING AT THE OUTPUT THEREOF A SIGNAL OF THE SAME FREQUENCY AS SAID INPUT SIGNAL BUT IN PHASE QUADRATURE THEREWITH, THE OUTPUT OF SAID PHASE SHIFTING MEANS BEING APPLIED BETWEEN THE JUNCTION POINT OF SAID TWO IMPEDANCES AND THE TAP OF SAID TAPPED IMPEDANCE, THEREBY PRODUCING A FREQUENCY DOUBLED OUTPUT ACROSS SAID TWO IMPEDANCES.
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