Demodulator for reference potential crossing data-modulated signals

Claim 1

A DEMODULATOR FOR RECTANGULAR-SHAPED WAVE DATAMODULATED SIGNALS HAVING CLOCK REFERENCE POTENTIAL CROSSINS AT REGULAR INTERVALS AND A DATA REFERENCE POTENTIAL CROSSING DURING EACH OF ONLY CERTAIN CLOCK INTERVALS AND NONE DURING OTHER CLOCK INTERVALS TO DISTINGHISH BETWEEN BINARY "ONE" AND BINARY "ZERO," INCLUDING MEANS FOR DERIVING A SERIES OF PULSES FROM THE REFERENCE POTENTIAL CROSSINGS OF SAID SIGNAL INCLUDING BOTH CLOCK AND DATA PULSES, A FIRST TIMED GATE RESPONSIVE TO A FIRST PULSE OF THE SERIES AND CLOSED DURING MOST OF THE ENSUING CLOCK INTERVAL BUT OPEN IN TIME TO PASS THE NEXT-FOLLOWING CLOCK PULSE, ANOTHER TIMED GATE RESPONSIVE TO APPLIED PULSES OF THE SERIES AND CLOSED DURING MOST OF EACH CLOCK INTERVAL BUT OPEN DURING ONLY AN INTERMEDIATE PART OF A CLOCK INTERVAL TO PASS DATA PULSES, AND A BISTABLE CIRCUIT RESPONSIVE TO PULSES PASSED BY SAID TIMING GATES FOR PROVIDING A DEMODULATED DATA SIGNAL.

Claim 2

THE METHOD OF SUPPRESSING DROP-OUT NOISE SPIKES IN A RECEIVED SIGNAL HAVING SQUARED SIGNAL PULSES, INCLUDING THE STEPS OF GENERATING A FILL-IN PULSE IN RESPONSE TO A SHARP DECLINING PART OF SAID RECEIVED SIGNAL, SAID FILL-IN PULSE BEING OF SHORT DURATION THAT IS NEVERTHELESS LONGER THAN A DROP-OUT NOISE SPIKE, AND ADDING SAID FILL-IN PULSE TO THE RECEIVED SIGNAL TO THEREBY ELIMINATE DROP-OUT GAPS IN SQUARED SIGNAL PULSES OF THE RECEIVED SIGNAL.