Multiplication by varying amplitude and period of output pulse

Claim 1

APPARATUS OF THE CLASS DESCRIBED COMPRISING: A RECTANGULAR PULSE GENERATOR, SAID PULSE GENERATOR PRODUCING CONSTANT MAGNITUDE ALTERNATING POLARITY RECTANGULAR PULSES, THE PERIOD OF SAID PULSES BEING VARIABLE IN RESPONSE TO A FIRST INPUT SIGNAL; FIRST AND SECOND DIODES SERIALLY CONNECTED ACROSS THE OUTPUT OF SAID PULSE GENERATOR, SAID FIRST AND SECOND DIODES BOTH CONDUCTING WHEN THE OUTPUT OF SAID GENERATOR IS OF A FIRST POLARITY; THIRD AND FOURTH DIODES ALSO SERIALLY CONNECTED ACROSS THE OUTPUT OF SAID PULSE GENERATOR, SAID THIRD AND FOURTH DIODES BOTH CONDUCTING WHEN THE OUTPUT OF SAID GENERATOR IS OF A SECOND POLARITY; FIRST AND SECOND IMPEDANCES SERIALLY CONNECTED FROM A JUNCTION BETWEEN SAID FIRST AND SECOND DIODES TO A JUNCTION BETWEEN SAID THIRD AND FOURTH DIODES; OUTPUT MEANS CONNECTED ACROSS SAID FIRST AND SECOND IMPEDANCES; AND MEANS FOR CONNECTING A SECOND SOURCE OF INPUT SIGNALS TO A JUNCTION BETWEEN SAID FIRST AND SECOND IMPEDANCES.