Multivibrator employing voltage controlled variable capacitance element in a couplingnetwork

Claim 1

A MULTIVIBRATOR CIRCUIT COMPRISING FIRST AND SECOND ACTIVE ELECTRON DEVICES EACH HAVING INPUT AND OUTPUT ELECTRODES; A FIRST COUPLING NETWORK COUPLED FROM THE OUTPUT ELECTRODE OF SAID SECOND DEVICE TO THE INPUT ELECTRODE OF SAID FIRST DEVICE; A SECOND COUPLING NETWORK, EXHIBITING A TIME CONSTANT AND INCLUDING A TIMING CAPACITANCE ELEMENT PROVIDING A CAPACITANCE THAT VARIES AS A FUNCTION OF A VOLTAGE APPLIED THEREACROSS, COUPLED BETWEEN THE OUTPUT ELECTODE OF SAID FIRST DEVICE AND THE INPUT ELECTRODE OF SAID SECOND DEVICE; MEANS BIASING SAID FIRST DEVICE NORMALLY TO BE CUT-OFF; MEANS BIASING SAID SECOND DEVICE NORMALLY TO BE CONDUCTING; MEANS TO APPLY A TRIGGER SIGNAL TO SAID FIRST DEVICE TO DRIVE IT INTO CONDUCTION, AND MEANS TO APPLY A CONTROL VOLTAGE ACROSS SAID TIMING CAPACITANCE ELEMENT TO CONTROLITS CAPACITANCE AND THE TIME CONSTANT OF SAID SECOND COUPLING NETWORK TO CONTROL THE CONDUCTION TIME OF SAID FIRST DEVICE.