Electronic device for switching low-level voltage signals

Claim 1

AN ELECTRONIC DEVICE FOR SWITCHING LOW LEVEL VOLTAGE SIGNALS, I.E. SIGNALS OF WHICH THE AMPLUTUDE MAY VARY WITHIN THE RANGE OF MINUS 100 MILLIVOLTS TO PLUS 100 MILLIVOLTS IN RELATION TO A REFERENC POTENTIAL AND TRANSMITTING SAID VOLTAGE SIGNALS TO A SINGLE OUTPUT LINE, COMPRISING A CLOCK PULSE GENERATOR EMITTING PERIODIC SWITCHING SIGNALS EACH OF WHICH COMPRISES A PLUSE TRAIN, THE PULSES IN EACH TRAIN HAVING A CONSTANT FREQUENCY, THE PULSE TRAINS BEING EMITTED DURING THE COURSE OF SUCCESSIVE PERIODS OF TIME, A PLURALITY OF NORMALLY CLOSED GATES HAVING THEIR OUTPUTS CONNECTED IN COMMON TO SAID SINGLE OUTPUT LINE AND EACH ARRANGED TO RECEIVE ONE OF THE VOLTAGE SIGNALS AT ITS INPUT, SAID GATES BEING ARRANGED TO BE SUCCESSIVELY AND CYCLICALLY OPENED BY SAID PERIODIC SWITCHING SIGNALS EMITTED BY SAID CLOCK PULSE GENERATOR, EACH OF SAID PERIODIC SWITCHING SIGNALS BEING APPLIED TO ONE OF THE GATES, EACH GATE COMPRISING AT LEAST ONE CHOPPER TRANSISTOR ARRANGED TO RECIEVE A VOLTAGE SIGNAL RELATED IN AMPLITUDE AND PHASE TO THE VOLTAGE SIGNAL APPLIED TO THE INPUT OF SAID GATE AND TO RECEIVE THE SWITCHING SIGNALS ON THE BASE THEREOF IN ORDER TO PRODUCE A PULSED CURRENT IN THE COLLECTOR-EMITTER CIRCUIT, AN OUTPUT TRANSFORMER COMPRISING A PLURALITY OF PRIMARY WINDINGS CONNECTED RESPECTIVELY WITH THE COLLECTOR-EMITTER CIRCUITS OF SAID VARIOUS GATES AND A SECONDARY WINDING, AND A DEMODULATOR BETWEEN SAID SECONDARY WINDING AND THE OUTPUT LINE, THIS DEMODULATOR BEING CONNECTED TO THE CLOCK PULSE GENERATOR AND ARRANGED TO RECEIVE THEREFROM A TRAIN OF DEMODULATING PULSES HAVING THE SAME FREQUENCY AS THE PULSES FORMING EACH SWITCHING SIGNAL IN ORDER TO RE ESTABLISH ON THE OUTPUT LINE THE VARIOUS VOLTAGE SIGNALS APPLIED TO THE INPUTS OF THE GATES.