Pulse detectors

Details Pulse detectors Pulse detectors

1980-03-17

1982-09-28

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 328151, H03K 5153, G01R 19165

Patent

active

043520308

ABSTRACT:
A tracking pulse detector comprising a feedback loop and means for adjustment of the detector bias to compensate for varying input signal levels whereby noise signals present at the input of the detector are maintained below the detector threshold thereby rendering the detector immune to false triggering. An AGC output is taken from a junction between resistors of a voltage divider and a capacitor is connected between the AGC output line and an OV line, the AGC voltage output being related to the total carrier level. The average current in the detector is kept approximately constant independently of supply and signal conditions and the feedback loops adjusts the DC bias of the detector to compensate for varying signal levels, thereby keeping any input noise signals below the detector threshold independent of the level of slow varying carriers. Any carrier level variation faster than the feedback loop time constants are detected.

REFERENCES:
patent: 3073968 (1963-01-01), Tribby
patent: 3628063 (1971-12-01), Tamari
patent: 3737790 (1973-06-01), Brown

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