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Class Information
Number: 455/218
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Squelch
Description: Subject matter where the receiver gain is automatically reduced (quieted) in response to a specified characteristic of the input signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619964 |
High doppler channel estimation for OFD multiple antenna systems |
Nov. 17, 2009 |
| 7545309 |
System and method for communicating low data rate information with a radar system |
Jun. 9, 2009 |
| 7489915 |
Squelch circuit and communication apparatus used with the same |
Feb. 10, 2009 |
| 7395042 |
Enhancing signals in a two-way radio system |
Jul. 1, 2008 |
| 7359688 |
Device and method for displaying a status of a portable terminal by using a character image |
Apr. 15, 2008 |
| 7295631 |
Stereo demultiplexer |
Nov. 13, 2007 |
| 7218903 |
Squelch detecting circuit |
May. 15, 2007 |
| 7180933 |
Squelch circuitry for high speed high frequency operation |
Feb. 20, 2007 |
| 7149498 |
Detecting usable frequency channels by exploiting complex polyphase filter operation |
Dec. 12, 2006 |
| 7120408 |
Differential signal squelch detection circuit and method |
Oct. 10, 2006 |
| 7096051 |
Enhancing signals in a two-way radio system |
Aug. 22, 2006 |
| 7043223 |
Super-regenerative radio frequency receiver and its data receiving method |
May. 9, 2006 |
| 6859645 |
Squelch detection circuit |
Feb. 22, 2005 |
| 6775526 |
Modulated input signal filter |
Aug. 10, 2004 |
| 6774700 |
Current-mode logic differential signal generation circuit employing squelch |
Aug. 10, 2004 |
| 6775527 |
Squelch circuit with adjustable reference level |
Aug. 10, 2004 |
| 6671504 |
Radio squelch techniques |
Dec. 30, 2003 |
| 6671503 |
Wireless microphone system |
Dec. 30, 2003 |
| 6564041 |
System and method providing improved FM carrier squelch system |
May. 13, 2003 |
| 6553215 |
Weather radio control |
Apr. 22, 2003 |
| 6456833 |
Method for noise reduction in the reception of RF FM signals |
Sep. 24, 2002 |
| 6397049 |
Two-way radio with improved squelch |
May. 28, 2002 |
| 6397050 |
Multiband squelch method and apparatus |
May. 28, 2002 |
| 6385440 |
Mobile communication receiver with asymmetric muting control |
May. 7, 2002 |
| 6374095 |
Method and apparatus for providing a squelch function on narrow band radio receivers |
Apr. 16, 2002 |
| 6334060 |
Multi-channel or split-frequency, low frequency, telemetry circuit and method between transmitters and receivers |
Dec. 25, 2001 |
| 6295444 |
Non-predictive tone-coded-squelch frequency determination method |
Sep. 25, 2001 |
| 6259904 |
Fast squelch circuit and method |
Jul. 10, 2001 |
| 6212245 |
Communication apparatus |
Apr. 3, 2001 |
| 6208848 |
Radio receiver squelch circuit with automatic adjustment of the squelch threshold |
Mar. 27, 2001 |
| 6192226 |
Carrier squelch processing system and apparatus |
Feb. 20, 2001 |
| 6101376 |
Squelch circuit and methodology for a multi-level quantizer |
Aug. 8, 2000 |
| 6055421 |
Carrier squelch method and apparatus |
Apr. 25, 2000 |
| 6055416 |
Prevention of audible control signal transmission |
Apr. 25, 2000 |
| 6047170 |
Automatic squelch control for narrow band AM radio |
Apr. 4, 2000 |
| 5970399 |
Radio channel squelching systems |
Oct. 19, 1999 |
| 5924022 |
RF repeater for TDMA mobile telephone systems |
Jul. 13, 1999 |
| 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 |
| 5809407 |
Receiver, an arrangement and a method for comparing two signals |
Sep. 15, 1998 |
| 5598431 |
Method and apparatus for signal quality detection in a communication system |
Jan. 28, 1997 |
| 5526530 |
Receiver with squelching responsive to input signal frequency |
Jun. 11, 1996 |
| 5491839 |
System for short range transmission of a plurality of signals simultaneously over the air using high frequency carriers |
Feb. 13, 1996 |
| 5491716 |
Weight-value controlled adaptive processor for spread spectrum receiver |
Feb. 13, 1996 |
| 5473615 |
Digital supervisory audio tone detector |
Dec. 5, 1995 |
| 5333153 |
Signal quality detection method and apparatus for optimum audio muting |
Jul. 26, 1994 |
| 5327465 |
Method and apparatus for squelch circuit in network communication |
Jul. 5, 1994 |
| 5287549 |
Commuication device and method using transceiver squelch control |
Feb. 15, 1994 |
| 5220685 |
Mute and automatic restore device for communications receivers |
Jun. 15, 1993 |
| 5214790 |
Enhanced talkgroup scan algorithm |
May. 25, 1993 |
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