Comparator switched squelch rectifier

Details Comparator switched squelch rectifier Comparator switched squelch rectifier

1991-09-03

1994-04-12

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455222, 375104, H04B 116, H04B 110

Patent

active

053034058

ABSTRACT:
A squelch circuit (200) having an input is provided including a programmable high pass filter (206) for filtering the input signal to produce a filtered signal. The filtered signal is rectified via a differential rectifier (201) to produce a rectified signal. The squelch circuit (200) also includes a threshold comparator (323) coupled to the differential rectifier (201) for sensing when the rectified signal exceeds a squelch threshold.

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