Bistable device employing transistors of complementary types

Claim 1

IN A BISTABLE DEVICE OF THE TYPE IN WHICH FIRST AND SECOND TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES HAVE THEIR COLLECTOR AND BASE ELECTRODES CROSS-COUPLED TO FORM A REGENERATIVE LOOP AND HAVE THEIR EMITTER ELECTRODES CONNECTED BETWEEN THE TERMINALS OF A POWER SUPPLY FOR STABLE OPERATION OF BOTH TRANSISTORS ALTERNATIVELY AT CUTOFF OR IN SATURATION; THE COMBINATION WITH THE TRANSISTORS OF A LOAD IMPEDANCE HAVING A FIRST END AND HAVING A SECOND END CONNECTED TO THE COLLECTOR ELECTRODE OF THE FIRST TRANSISTOR; MEANS CONNECTED TO THE FIRST END OF THE LOAD IMPEDANCE NORMALLY REVERSE BIASING THE COLLECTOR ELECTRODE OF THE FIRST TRANSISTOR AND INHIBITING SERIES CURRENT FLOW THROUGH THE PATH INCLUDING THE LOAD IMPEDANCE AND THE BASE-EMITTER JUNCTION OF THE SECOND TRANSISTOR; MEANS NORMALLY MAINTAINING THE TRANSISTORS IN THEIR CUTOFF CONDITIONS; SET AND RESET MEANS COUPLED TO THE BASE ELECTRODES OF THE SECOND AND FIRST TRANSISTORS RESPECTIVELY, AND ADAPTED FOR CONNECTION WITH RESPECTIVE SOURCES OF INPUT PULSES FOR TURNING THE TRANSISTORS ON AND OFF RESPECTIVELY;