Disturbing signal detection circuit

Details Disturbing signal detection circuit Disturbing signal detection circuit

1977-03-14

1978-11-07

Martin, John C.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

325318, 307237, 328165, H04B 110

Patent

active

041248198

ABSTRACT:
A signal being received and superimposed disturbance pulses are taken from a stage of the receiver where the signal is a periodic wave of constant amplitude or of amplitude varying at rates limited by a moderate modulation band, and the signal so picked up is AC-coupled to a diode clamp circuit, the clamp voltage then being amplified to produce a control output for a blanking gate. The forward voltage of the diode is insufficient to put the transistor of the following amplifier into its conducting condition, so that the transistor conducts only when a disturbance pulse extends beyond the limits of the envelope of the sinusoidal signal. By the use of a phase splitter, two identical clamp circuits may be operated to detect disturbance pulses of opposite polarity, and their outputs may be combined to provide blanking control pulses whenever a disturbance pulse of either polarity appears.

REFERENCES:
patent: 3126514 (1964-03-01), Germain et al.
patent: 3240956 (1966-03-01), Stone et al.
patent: 3248658 (1966-04-01), Brown
patent: 3320436 (1967-05-01), Sharples
patent: 3978412 (1976-08-01), Freking

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