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Browse by Category: Main > Communications
Class Information
Number: 375/362
Name: Pulse or digital communications > Synchronizers > Frequency or phase control using synchronizing signal
Description: Subject matter which uses the transmission and ultimate reception and separation of a special synchronizing signal interleaved with the incoming information signal.










Sub-classes under this class:

Class Number Class Name Patents
375/369 Start - stop 147
375/363 Synchronization bit insertion into artificially created gaps 197
375/364 Synchronization signals with unique amplitude, polarity, length, or frequency 420
375/365 Synchronization word 615


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
5768321 Automatic frequency control unit which detects a frame pattern in a phase modulation signal Jun. 16, 1998
5761190 OFDM broadcast wave receiver Jun. 2, 1998
5748677 Reference signal communication method and system May. 5, 1998
5740210 Data discriminating circuit and a parallel data receiver using the same Apr. 14, 1998
5737329 Spread spectrum communication apparatus Apr. 7, 1998
5729550 Data transmitter-receiver Mar. 17, 1998
5726974 Receiving circuit having a frequency compensated local oscillation circuit Mar. 10, 1998
5719511 Circuit for generating an output signal synchronized to an input signal Feb. 17, 1998
5719904 Data restoring circuit Feb. 17, 1998
5712624 Method and apparatus for optimizing receiver synchronization in a radio communication system Jan. 27, 1998
5710773 Packet transmission system Jan. 20, 1998
5703913 Timing signal generator Dec. 30, 1997
5694441 Phase synchronizing apparatus, decoder and semiconductor integrated circuit device Dec. 2, 1997
5694397 Constant bit rate synchronization Dec. 2, 1997
5692016 Process and arrangement for adjusting the local oscillators of a receiver in a multi-channel transmission system Nov. 25, 1997
5680596 Data transfer apparatus with automatic transmission rate adjustment Oct. 21, 1997
5677908 Hand-over method for mobile communication Oct. 14, 1997
5675284 Frequency lock indicator for FPLL demodulated signal having a pilot Oct. 7, 1997
5673133 Phase synchronization system Sep. 30, 1997
5659545 Apparatus for mobile unit acquisition in a satellite communication system and method therefor Aug. 19, 1997
5627864 Phase shift correcting apparatus of a sync detector in a satellite broadcasting reception system May. 6, 1997
5627863 Frame synchronization in multicarrier transmission systems May. 6, 1997
5625651 Discrete multi-tone data transmission system using an overhead bus for synchronizing multiple remote units Apr. 29, 1997
5623522 Asynchronous serial data receiving device Apr. 22, 1997
5602835 OFDM synchronization demodulation circuit Feb. 11, 1997
5598446 Clock extraction of a clock signal using rising and falling edges of a received transmission signal Jan. 28, 1997
5592507 Intermediate relay station of a digital microwave communication system using service channel for monitoring and controlling space and/or time diversity, heterodyne relay, phase control, freque Jan. 7, 1997
5574757 Phase-locked loop circuit having a timing holdover function Nov. 12, 1996
5570393 Digital audio signal demodulator Oct. 29, 1996
5568488 Pointer re-setting method and apparatus thereof Oct. 22, 1996
5555247 Frame synchronizing apparatus for quadrature modulation data communication radio receiver Sep. 10, 1996
5550812 System for broadcasting and receiving digital data, receiver and transmitter for use in such system Aug. 27, 1996
5548621 Data instrumentation system having circuitry for resolving multiple asynchronous state inputs Aug. 20, 1996
5528637 Synchronizing circuit Jun. 18, 1996
5526380 First-order loop control configuration for a phase-rotator based clock synchronization circuit Jun. 11, 1996
5522048 Low-power area-efficient and robust asynchronous-to-synchronous interface May. 28, 1996
5519444 Phase synchronizing loop apparatus for digital audio signals May. 21, 1996
5519734 Synchronization arrangement for decoder-de-interleaver May. 21, 1996
5512851 Circuit synchronization when switching between multiple clock signals using a variable advance controller Apr. 30, 1996
5500757 Optical receiving system Mar. 19, 1996
5495470 Alarm correlation system for a telephone network Feb. 27, 1996
5491728 Cell resequencing system for a telecommunication network Feb. 13, 1996
5488639 Parallel multistage synchronization method and apparatus Jan. 30, 1996
5475684 Time-division multiplex communication transmission apparatus Dec. 12, 1995
5459753 Method and apparatus for pattern independent phase detection and timing recovery Oct. 17, 1995
5457713 Spread spectrum alignment repositioning method Oct. 10, 1995
5444697 Method and apparatus for frame synchronization in mobile OFDM data communication Aug. 22, 1995
5442658 Synchronization apparatus for a synchronous data processing system Aug. 15, 1995
5440267 Demodulator Aug. 8, 1995
5440313 GPS synchronized frequency/time source Aug. 8, 1995

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