FM demodulator having squelch circuit using bucket brigade delay

Details FM demodulator having squelch circuit using bucket brigade delay FM demodulator having squelch circuit using bucket brigade delay

1975-06-30

1976-09-07

Griffin, Robert L.

325478, H04B 110

Patent

active

039796795

ABSTRACT:
An improved squelch circuit for FM demodulators including a low pass filter for filtering out-of-band noise from the demodulator output signals, a delay line for time delaying the filtered signals, a gate for selectively passing the filtered demodulated output signals to an output terminal, and a control circuit for controlling the gate. The control circuit includes a high pass filter for passing the out-of-band noise in the demodulated signals, a detector for detecting the noise level of the noise passed by the high pass filter, and a comparator for comparing the detected out-of-band noise level to a reference to develop a gate control signal which causes the gate to be opened when the out-of-band noise level is relatively low and to be closed when the out-of-band noise level is relatively high.

REFERENCES:
patent: 2756328 (1956-07-01), Braak
patent: 3049710 (1962-04-01), Buesing et al.
patent: 3568068 (1971-03-01), Russell, Jr.
patent: 3588705 (1971-06-01), Paine
patent: 3851253 (1974-11-01), Eastmond

Affiliated with

Also associated with

Rating

FM demodulator having squelch circuit using bucket brigade delay does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with FM demodulator having squelch circuit using bucket brigade delay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FM demodulator having squelch circuit using bucket brigade delay will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2175145