Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 375/334
Name: Pulse or digital communications > Receivers > Angle modulation > Frequency shift keying
Description: Subject matter where the carrier has been modulated by shifting its frequency in accordance with the pulses transmitted.










Sub-classes under this class:

Class Number Class Name Patents
375/336 Minimum shift keying 107
375/335 More than two frequencies 125
375/337 Separate mark and space channels 42


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
5339333 FSK demodulator using signal transitions Aug. 16, 1994
5333151 High speed frequency-shift keying decoder Jul. 26, 1994
5313169 Method of realigning the local oscillators of a receiver and device for implementing the method May. 17, 1994
5311556 Digital FSK transmitter receiver and method of operating same May. 10, 1994
5309113 FSK data demodulator May. 3, 1994
5301210 Coherent demodulating device with carrier wave recovering digital circuit Apr. 5, 1994
5293408 FSK data receiving system Mar. 8, 1994
5287516 Demodulation process for binary data Feb. 15, 1994
5265126 Voice recording and reproducing apparatus having perpendicular carrier modulation Nov. 23, 1993
5245632 Synchronous FSK detection Sep. 14, 1993
5227741 Variable speed asynchronous modem Jul. 13, 1993
5222079 Adaptive information signal receiver Jun. 22, 1993
5197084 Automatic information acquisition system Mar. 23, 1993
5197085 Radio receiver Mar. 23, 1993
5163071 Method and arrangement for bit synchronization in a receiver for digital data transmission Nov. 10, 1992
5155446 Digital FSK demodulator Oct. 13, 1992
5150382 Frequency error detecting apparatus Sep. 22, 1992
5142237 Method of demodulation Aug. 25, 1992
5128966 System for demodulating frequency- or phase-modulated signals by quadrature-phase Jul. 7, 1992
5105444 System for high speed data tranmission Apr. 14, 1992
5103463 Method and system for encoding and decoding frequency shift keying signals Apr. 7, 1992
5091921 Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency Feb. 25, 1992
5081644 Spread spectrum receiving device Jan. 14, 1992
5073903 Information transmission arrangement using frequency modulation Dec. 17, 1991
5058138 Modular receiver for signals having multiple channels and multiple formats Oct. 15, 1991
5046073 Signal processing apparatus for recovering a clock signal and a data signal from an encoded information signal Sep. 3, 1991
5039951 Josephson junction FSK demodulator Aug. 13, 1991
5040192 Method and apparatus for optimally autocorrelating an FSK signal Aug. 13, 1991
5023562 Digitizing circuit for demodulated digital data signals Jun. 11, 1991
5022055 Trunk dialing converter Jun. 4, 1991
5015961 Frequency shift demodulator May. 14, 1991
4987374 FSK demodulator Jan. 22, 1991
4910753 FSK demodulating device Mar. 20, 1990
4897857 FSK demodulating device Jan. 30, 1990
4887314 Optical FSK demodulator Dec. 12, 1989
4870659 FSK demodulation circuit Sep. 26, 1989
4868861 Trunk dialing converter Sep. 19, 1989
4825452 Digital FSK demodulator Apr. 25, 1989
4799239 Phase-coherent FSK signal demodulator Jan. 17, 1989
4795986 Method and circuit for carrier synchronism recovery in PSK coherent demodulators Jan. 3, 1989
4785255 Digital FSK signal demodulator Nov. 15, 1988
4759080 Coherent optical communication system with FSK heterodyne or homodyne detection and little influence by distortion of a modulated optical signal Jul. 19, 1988
4752742 Frequency demodulator for recovering digital signals Jun. 21, 1988
4745627 Procedure and circuit for detection of the information of a received signal May. 17, 1988
4716376 Adaptive FSK demodulator and threshold detector Dec. 29, 1987
4716579 Phase corrector Dec. 29, 1987
4703476 Encoding of transmitted program material Oct. 27, 1987
4694471 Digital data communicating Sep. 15, 1987
4675881 Arrangement for recovering a clock signal from an angle-modulated carrier signal having a modulation index m=0.5 Jun. 23, 1987
4672636 AFC circuit for direct modulation FM data receivers Jun. 9, 1987

1 2 3 4 5 6 7 8 9










 
 
  Recently Added Patents
System and method for calibrating display device using transfer functions
Control method of LPI lamp for LPI vehicle and logic therefor
Voltage detector having voltage detection printed board
Incentive based recommendation method for mobile station content
High-density 3-dimensional structure
Method and apparatus for controlling a multi-node process
Glove
  Randomly Featured Patents
Fluid dispensing system
System and method for metal-oxide-semiconductor field effect transistor
Dye-sensitized photoelectric conversion device
Fenicol compounds and methods synthesizing 2-trifluoroacetamido-3-substituted propiophenone compounds
Lightweight armor
System and method for dividing computations
FAS ligand derived polypeptides
Yarn false twisting apparatus
Front bumper for a vehicle
Glow-discharge lamp and its application