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Class Information
Number: 375/217
Name: Pulse or digital communications > Apparatus convertible to analog > Muting circuit and squelch
Description: Subject matter including a means to automatically quiet the receiver by reducing its gain in response to a specified characteristic of the input digital signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7489915 |
Squelch circuit and communication apparatus used with the same |
Feb. 10, 2009 |
| 7295617 |
ADPCM decoder |
Nov. 13, 2007 |
| 7180933 |
Squelch circuitry for high speed high frequency operation |
Feb. 20, 2007 |
| 7180950 |
Low-noise feedback cancellation filter for enhanced common-mode rejection and noise immunity |
Feb. 20, 2007 |
| 7003053 |
Digital broadcast receiver |
Feb. 21, 2006 |
| 6914940 |
Device for improving voice signal in quality |
Jul. 5, 2005 |
| 6480532 |
Echo cancellation for an ADSL modem |
Nov. 12, 2002 |
| 6212245 |
Communication apparatus |
Apr. 3, 2001 |
| 6208700 |
Apparatus for processing a signal received via an information carrier |
Mar. 27, 2001 |
| 6061096 |
Digital-and-analog-TV-signal receivers, each with single first detector and shared high-band I-F amplification |
May. 9, 2000 |
| 6049565 |
Method and apparatus for audio communication |
Apr. 11, 2000 |
| 6047036 |
System and method for implementing a mute voice signal upon reception of a ADPCM zero nibble in wireless communications |
Apr. 4, 2000 |
| 6011806 |
Cellular telephone communication protocol |
Jan. 4, 2000 |
| 5881101 |
Burst serial tone waveform signaling method and device for squelch/wake-up control of an HF transceiver |
Mar. 9, 1999 |
| 5844938 |
Carrier based data operated squelch |
Dec. 1, 1998 |
| 5615412 |
Digital squelch tail system and method for same |
Mar. 25, 1997 |
| 5598430 |
Analog/digital receiver |
Jan. 28, 1997 |
| 5598431 |
Method and apparatus for signal quality detection in a communication system |
Jan. 28, 1997 |
| 5490166 |
Data muting method and apparatus using delay circuits for communication systems |
Feb. 6, 1996 |
| 5465404 |
Communications receiver with an adaptive squelch system |
Nov. 7, 1995 |
| 5285481 |
Receiver circuit with smart squelch |
Feb. 8, 1994 |
| 5263049 |
Method and apparatus for CMOS differential drive having a rapid turn off |
Nov. 16, 1993 |
| 5151922 |
Variable speaker muting based on received data |
Sep. 29, 1992 |
| 5109525 |
Two-way radio with voice storage |
Apr. 28, 1992 |
| 5063597 |
Muting circuit in a digital audio system |
Nov. 5, 1991 |
| 5001703 |
Spectrally efficient TDM duplex communication system |
Mar. 19, 1991 |
| 4748685 |
Mobile radio communications system |
May. 31, 1988 |
| 4663765 |
Data muting method and apparatus for audo-digital communications systems |
May. 5, 1987 |
| 4431991 |
Encoder for transmitted message deactivation code |
Feb. 14, 1984 |
| 4430742 |
Data muting method and apparatus for radio communications systems |
Feb. 7, 1984 |
| 4423416 |
Decoder for transmitted message deactivation code |
Dec. 27, 1983 |
| 4418416 |
Frequency modulation transmitter for voice or data |
Nov. 29, 1983 |
| 4344175 |
Muting circuit |
Aug. 10, 1982 |
| 4323730 |
Idle channel noise suppressor for speech encoders |
Apr. 6, 1982 |
| 4038604 |
Signal to noise ratio indicating circuit |
Jul. 26, 1977 |
| 4020421 |
Muting circuit |
Apr. 26, 1977 |
| 3939431 |
Muting circuit for a radio receiver |
Feb. 17, 1976 |
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