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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 |
| 5513388 |
Automatic frequency control circuit |
Apr. 30, 1996 |
| 5509034 |
Frequency synchronizing method for a reference oscillator |
Apr. 16, 1996 |
| 5506871 |
Adaptive equalizing system for digital communications |
Apr. 9, 1996 |
| 5504785 |
Digital receiver for variable symbol rate communications |
Apr. 2, 1996 |
| 5500878 |
Automatic frequency control apparatus and method therefor |
Mar. 19, 1996 |
| 5497402 |
Automatic frequency control device for satellite communications ground system |
Mar. 5, 1996 |
| 5495506 |
Automatic frequency control apparatus |
Feb. 27, 1996 |
| 5491715 |
Automatic antenna tuning method and circuit |
Feb. 13, 1996 |
| 5491725 |
Tracking filter and quadrature-phase reference generator |
Feb. 13, 1996 |
| 5490176 |
Detecting false-locking and coherent digital demodulation using the same |
Feb. 6, 1996 |
| 5487186 |
Automatic frequency control using split-band signal strength measurements |
Jan. 23, 1996 |
| 5485489 |
Carrier recovery circuit for offset QPSK demodulators |
Jan. 16, 1996 |
| 5483555 |
Phase adjusting circuit for a demodulator |
Jan. 9, 1996 |
| 5483686 |
Channel selecting apparatus for simultaneous use with both phase-continuous modulation signals and digital modulation signals |
Jan. 9, 1996 |
| 5479452 |
Method and apparatus for aligning a digital receiver |
Dec. 26, 1995 |
| 5475710 |
Adaptive equalizer and receiver |
Dec. 12, 1995 |
| 5471508 |
Carrier recovery system using acquisition and tracking modes and automatic carrier-to-noise estimation |
Nov. 28, 1995 |
| 5461645 |
Frequency stabilizing device |
Oct. 24, 1995 |
| 5457716 |
Automatic frequency control in a radio communication receiver |
Oct. 10, 1995 |
| 5455536 |
Demodulator circuit and demodulating method employing bit error rate monitor |
Oct. 3, 1995 |
| 5450447 |
Adaptive variable-gain phase and frequency locked loop for rapid carrier acquisition |
Sep. 12, 1995 |
| 5444736 |
Radio communication apparatus having an automatic frequency control circuit for controlling a transmission frequency on the basis of a reception frequency |
Aug. 22, 1995 |
| 5442656 |
Timing extraction device and data transmission device using the timing extraction device |
Aug. 15, 1995 |
| 5440589 |
Frequency offset dealing modulator and demodulator apparatus |
Aug. 8, 1995 |
| 5440587 |
Demodulator for digitally modulated wave |
Aug. 8, 1995 |
| 5438591 |
Quadrature amplitude modulation type digital radio communication device and method for preventing abnormal synchronization in demodulation system |
Aug. 1, 1995 |
| 5438692 |
Direct conversion receiver |
Aug. 1, 1995 |
| 5438594 |
Device for demodulating digital signals modulated by an alternating modulation constellation technique |
Aug. 1, 1995 |
| 5434889 |
Receiver comprising an arrangement for estimating a frequency deviation |
Jul. 18, 1995 |
| 5432819 |
DPSK communications with Doppler compensation |
Jul. 11, 1995 |
| 5423085 |
Method and apparatus for digital automatic frequency control of TDM communications systems |
Jun. 6, 1995 |
| 5418815 |
Receiver adaptively operable for multiple signal transmission systems |
May. 23, 1995 |
| 5416805 |
Receiver for receiving frequency modulated signals and having a controlled acquisition band |
May. 16, 1995 |
| 5416803 |
Process for digital transmission and direct conversion receiver |
May. 16, 1995 |
| 5412693 |
Wholly-digital demodulation system for QAM signalling in low capacity links |
May. 2, 1995 |
| 5412695 |
Method and device for removing frequency offset |
May. 2, 1995 |
| 5406587 |
Error tracking loop |
Apr. 11, 1995 |
| 5402446 |
FSK receiver having a PLL local oscillator operable in intermittent operation in accordance with its phase locked state |
Mar. 28, 1995 |
| 5402449 |
Process and device for converting digitally modulate high-frequency reception signals |
Mar. 28, 1995 |
| 5400363 |
Quadrature compensation for orthogonal signal channels |
Mar. 21, 1995 |
| 5400366 |
Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same |
Mar. 21, 1995 |
| 5396521 |
Receiver capable of reducing power consumption in a PLL circuit |
Mar. 7, 1995 |
| 5388125 |
Frequency converter circuit with improved intermediate frequency stability |
Feb. 7, 1995 |
| 5375146 |
Digital frequency conversion and tuning scheme for microwave radio receivers and transmitters |
Dec. 20, 1994 |
| 5363415 |
Carrier regenerating device correctly operable in mobile satellite communication |
Nov. 8, 1994 |
| 5355393 |
Digital oscillator for carrier frequency synchronization |
Oct. 11, 1994 |
| 5355171 |
Digital oscillator and color subcarrier demodulation circuit having the digital oscillator |
Oct. 11, 1994 |
| 5343499 |
Quadrature amplitude modulation synchronization method |
Aug. 30, 1994 |
| 5341402 |
Automatic frequency control method and device for use in receiver |
Aug. 23, 1994 |
| 5323104 |
Method and arrangement for demodulating a frequency modulated signal |
Jun. 21, 1994 |
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