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Class Information
Number: 375/344
Name: Pulse or digital communications > Receivers > Automatic frequency control
Description: Subject matter where a receiver frequency response characteristic is set or adjusted in response to frequency changes in the input signal or charges in the receiver parameters.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4821294 |
Digital signal processor and processing method for GPS receivers |
Apr. 11, 1989 |
| 4817192 |
Dual-mode AFC circuit for an SSB radio transceiver |
Mar. 28, 1989 |
| 4807256 |
Global position system receiver |
Feb. 21, 1989 |
| 4807254 |
Carrier wave recovery system |
Feb. 21, 1989 |
| 4802191 |
Data transmission using a transparent tone-in band system |
Jan. 31, 1989 |
| 4795986 |
Method and circuit for carrier synchronism recovery in PSK coherent demodulators |
Jan. 3, 1989 |
| 4794341 |
Digital filters and demodulators |
Dec. 27, 1988 |
| 4777640 |
Frequency adaptive phase jitter canceler |
Oct. 11, 1988 |
| 4759036 |
Decision-directed control circuit |
Jul. 19, 1988 |
| 4737970 |
Clock recovery using cavity resonator |
Apr. 12, 1988 |
| 4726043 |
Data decision-directed timing and carrier recovery circuits |
Feb. 16, 1988 |
| 4712222 |
Adaptive recursive phase offset tracking system |
Dec. 8, 1987 |
| 4712221 |
Carrier recovery of modulated signals |
Dec. 8, 1987 |
| 4696056 |
Frequency converting circuit |
Sep. 22, 1987 |
| 4691377 |
Automatic frequency and gain control circuit |
Sep. 1, 1987 |
| 4680778 |
Fast acquisition circuit for synchronous digital receiver operating in wideband noise |
Jul. 14, 1987 |
| 4677647 |
Synchronization of multichannel receiver based on higher quality channels |
Jun. 30, 1987 |
| 4672640 |
Radio receiver |
Jun. 9, 1987 |
| 4672636 |
AFC circuit for direct modulation FM data receivers |
Jun. 9, 1987 |
| 4672631 |
Radio receiver with variable phase shift correction |
Jun. 9, 1987 |
| 4670889 |
Frequency control for point to multipoint radio |
Jun. 2, 1987 |
| 4669094 |
FSK data receiver |
May. 26, 1987 |
| 4660215 |
Transmitter/receiver system |
Apr. 21, 1987 |
| 4651107 |
Demodulator for digital FM signals |
Mar. 17, 1987 |
| 4649551 |
Decoder for a frequency-keyed signal, particularly an FSK-video text signal |
Mar. 10, 1987 |
| 4647864 |
Variable-delay, sine-cosine non-coherent demodulator |
Mar. 3, 1987 |
| 4641325 |
Receiver for phase shift modulated carrier signals |
Feb. 3, 1987 |
| 4630283 |
Fast acquisition burst mode spread spectrum communications system with pilot carrier |
Dec. 16, 1986 |
| 4613977 |
Digital Navstar receiver |
Sep. 23, 1986 |
| 4606048 |
Radio communication system |
Aug. 12, 1986 |
| 4594727 |
Synchronous receiver |
Jun. 10, 1986 |
| 4587498 |
Circuit for recovering the carrier of an amplitude-and-phase-modulated input signal |
May. 6, 1986 |
| 4584710 |
Coherent receiver phase and amplitude alignment circuit |
Apr. 22, 1986 |
| 4577334 |
Digital data receiver including timing adjustment circuit |
Mar. 18, 1986 |
| 4561099 |
Clock recovery system for TDMA satellite communication system |
Dec. 24, 1985 |
| 4527278 |
Method for correcting the frequency of a local carrier in a receiver of a data transmission system and receiver using this method |
Jul. 2, 1985 |
| 4523324 |
Direct modulation FM data receiver |
Jun. 11, 1985 |
| 4518947 |
Apparatus for decoding redundant interleaved data |
May. 21, 1985 |
| 4485477 |
Fast frequency/code search |
Nov. 27, 1984 |
| 4475218 |
Carrier-recovery circuit |
Oct. 2, 1984 |
| 4472817 |
Non-PLL concurrent carrier clock synchronization |
Sep. 18, 1984 |
| 4472810 |
Charge-transfer modulator-demodulator |
Sep. 18, 1984 |
| 4468793 |
Global position system (GPS) multiplexed receiver |
Aug. 28, 1984 |
| 4466108 |
TDMA/PSK Carrier synchronization without preamble |
Aug. 14, 1984 |
| 4462109 |
Receiver for phase-shift modulated carrier signals |
Jul. 24, 1984 |
| 4462108 |
Modem signal acquisition technique |
Jul. 24, 1984 |
| 4461014 |
Carrier regenerating circuit |
Jul. 17, 1984 |
| 4457006 |
Global positioning system receiver |
Jun. 26, 1984 |
| 4457003 |
Time reference tracking loop for frequency hopping systems |
Jun. 26, 1984 |
| 4451930 |
Phase-locked receiver with derived reference frequency |
May. 29, 1984 |
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