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Class Information
Number: 455/219
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Squelch > With automatic gain or volume control
Description: Subject matter combined with control of the amplification of the receiver without manual intervention.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5303409 |
Automatically compensated squelch circuit |
Apr. 12, 1994 |
| 5212827 |
Zero intermediate frequency noise blanker |
May. 18, 1993 |
| 5179577 |
Dynamic threshold data receiver for local area networks |
Jan. 12, 1993 |
| 4978926 |
Audio limiter using voltage multiplexed feedback |
Dec. 18, 1990 |
| 4731873 |
Squelch trigger circuit |
Mar. 15, 1988 |
| 4683386 |
Electronic attenuation value control circuit in which switching noise is suppressed |
Jul. 28, 1987 |
| 4654885 |
Mobile radio range extender with saw filter |
Mar. 31, 1987 |
| 4584714 |
Automotive radio receiver with radio frequency interference elimination circuit |
Apr. 22, 1986 |
| 4525870 |
Automotive radio receiver with radio frequency interference elimination circuit |
Jun. 25, 1985 |
| 4480335 |
Noise removing apparatus in an FM receiver |
Oct. 30, 1984 |
| 4479251 |
Noise blanker |
Oct. 23, 1984 |
| 4466129 |
Noise reducing circuitry for single sideband receivers |
Aug. 14, 1984 |
| 4461025 |
Automatic background noise suppressor |
Jul. 17, 1984 |
| 4411020 |
Power efficient radio receiver apparatus |
Oct. 18, 1983 |
| 4403349 |
Intermediate frequency detection circuit |
Sep. 6, 1983 |
| 4397040 |
UHF Receiver with decreased distortion due to multipath reception |
Aug. 2, 1983 |
| 4380824 |
Receiving reproducing system |
Apr. 19, 1983 |
| 4371981 |
Spectral squelch |
Feb. 1, 1983 |
| 4334317 |
Noise blanking circuitry in a radio receiver |
Jun. 8, 1982 |
| 4313215 |
Circuit for attenuating disturbing noise signals |
Jan. 26, 1982 |
| 4267598 |
Noise-memory regulated squelch compensator |
May. 12, 1981 |
| 4241453 |
Citizens band radio receiver with squelch control |
Dec. 23, 1980 |
| 4234959 |
Dual threshold repeater squelch circuit |
Nov. 18, 1980 |
| 4216430 |
Noise eliminating circuit with automatic gain control |
Aug. 5, 1980 |
| 4186354 |
Summing amplifier for developing a squelch and meter voltage in a radio receiver |
Jan. 29, 1980 |
| 4143331 |
Summing amplifier for developing a squelch and meter voltage in a radio receiver |
Mar. 6, 1979 |
| 4107613 |
Wireless microphone with FM receiver muting system responsive to excessive undesired AM level or low AGC control level |
Aug. 15, 1978 |
| 4060764 |
Transceiver audio system |
Nov. 29, 1977 |
| 4057761 |
Received signal selecting system with priority control |
Nov. 8, 1977 |
| 4041390 |
Transceiver squelch circuit |
Aug. 9, 1977 |
| 4013962 |
Improved receiver selecting (voting) system |
Mar. 22, 1977 |
| 3952252 |
Noise suppressor for telecommunication system |
Apr. 20, 1976 |
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