Telecommunications – Receiver or analog modulated signal frequency converter – Squelch
Patent
1992-04-03
1994-04-12
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Squelch
455225, 375104, H04B 110
Patent
active
053034082
ABSTRACT:
A communication device (100) having a receiver (106) and an audio output device (116) is provided. The communication device (100) includes a digital signal processor DSP (110) for measuring the level of signal energy in a first segment of the frequency spectrum of the received signal to dynamically establish a squelch threshold. The DSP (110) is also used to measure the level of signal energy in a second segment of the frequency spectrum of the received signal. The communication device (100) also includes audio gates (114). The audio gates (114) provides for the unmuting of the audio output device (116) when the signal energy contained in the second segment of the frequency spectrum of the received signal is below the squelch threshold.
REFERENCES:
patent: 3102236 (1963-08-01), Eichenberger et al.
patent: 3873926 (1975-03-01), Wright
patent: 3902123 (1975-08-01), Oomen
patent: 4388731 (1983-06-01), King
patent: 4477924 (1984-10-01), Close
patent: 4480335 (1984-10-01), Kishi
patent: 4783845 (1988-11-01), McChesney et al.
patent: 4914715 (1990-04-01), Miyata
patent: 4972510 (1990-11-01), Guizerix et al.
patent: 5151922 (1992-09-01), Weiss
Ghomeshi Mansour
Simmons John W.
Wong Chin P.
Charouel Lisa
Eisenzopf Reinhard J.
Ghomeshi Mansour M.
Motorola Inc.
LandOfFree
Squelch detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Squelch detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Squelch detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2107042