Patents
Patents for H03J 7 - Automatic frequency control; Automatic scanning over a band of frequencies (3,745)
07/1992
07/22/1992EP0495514A2 Auto-tuned apparatus for band-pass filter
07/21/1992US5132799 Frequency synthesizer-type television signal receiving apparatus comprising AFT function and controlling method therefor
07/14/1992US5130803 Satellite broadcasting tuner
07/14/1992US5130670 Phase-locking circuit for swept synthesized source preferably having stability enhancement circuit
07/08/1992EP0494058A1 A method for fine tuning the resonant frequency of a filter in a combiner
07/08/1992EP0493763A1 Microprocessor controlled digital aft unit
07/08/1992EP0493755A2 Digital method and apparatus for measuring the frequency of an IF signal
07/01/1992WO1992012578A1 Frequency control system
06/1992
06/16/1992CA1303728C Television tuning system allowing rapid response to user initiated commands
06/09/1992CA1303261C Tuning method
05/1992
05/20/1992EP0485453A1 Radio receiver frequency control system
05/19/1992US5115515 Method and apparatus for radio communication with improved automatic frequency control
05/12/1992US5113416 Digital radio frequency compensation
04/1992
04/29/1992EP0483090A1 Digital radio frequency compensation
04/28/1992US5109531 Sideband receiver with pilot lock
04/21/1992US5107522 Automatic frequency control circuit
04/21/1992US5107335 Automatic frequency control method and receiving apparatus using thereof
04/21/1992CA1299255C Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication
04/21/1992CA1299250C Frequency difference detector (fdd) and a carrier modulated receiver including such a fdd
04/15/1992EP0479895A1 Low voltage afc switch
04/08/1992EP0479613A2 An automatic broadcast wave tuning device for RDS receiver
04/08/1992CN1060188A Previous channel feature in television receiver having multiple rf inputs
04/08/1992CN1060187A Linkable scan lists for television receiver
04/01/1992EP0477756A2 Linkable scan lists for a television receiver
04/01/1992EP0477753A2 A previous channel feature in a television receiver having multiple RF inputs
03/1992
03/31/1992US5101509 Rf filter alignment using digital processor clock
03/25/1992EP0476826A2 A method of selecting receiving frequency for RDS receiver
03/25/1992CN1016034B Frequency control apparatus and method for digital radio receiver
03/18/1992EP0475705A2 RF filter alignment using digital processor clock
03/15/1992CA2048100A1 Rf filter alignment using digital processor clock
03/11/1992CN1015854B Automatic intermediate frequency tangent lock control circuit
03/11/1992CN1015851B Adaptive scanning method
03/04/1992EP0473373A2 Calibration system for direct conversion receiver
03/03/1992CA1296776C Automatic if tangent lock control circuit
02/1992
02/11/1992US5087977 Channel selecting apparatus automatically detecting different modes of television signals
02/05/1992EP0469341A2 Broadcast receiver with a radio data signal decoder
02/05/1992EP0469301A2 Signal-strength-peak detecting circuit for automatic tuning circuit
02/05/1992EP0469001A1 Paging receiver with continuously tunable antenna and rf amplifier
01/1992
01/31/1992WO1992002991A1 Dual mode automatic frequency control
01/15/1992EP0466080A1 Remote control device for transmitter-receiver sets, in particular for the reconfiguration of base stations of a cellular telephone network
01/14/1992US5081590 Computer aided technique for post production tuning of microwave modules
01/11/1992CA2046480A1 Transceiver group remote control device, particularly for the base station configuration in a cellular radiotelephone network
01/08/1992EP0464853A2 Radio receiving system
01/08/1992CN1057746A Method for alignment of analog circuit sections within integrated circuit
01/07/1992CA2046378A1 Radio receiving system
12/1991
12/31/1991US5077834 Paging receiver with continuously tunable antenna and RF amplifier
12/31/1991US5077827 Warning receiver readiness monitoring circuit
12/27/1991EP0462718A2 Broadcast receiver system
12/26/1991WO1991020140A1 Quadrature amplitude modulation synchronization method
12/20/1991CA2043046A1 Broadcast receiver capable of automatic station identification and format-scanning based on an internal database updatable via data reception over the airwaves
12/17/1991US5073975 Stop on station circuit including center channel detector
12/17/1991US5073973 Method and circuitry for automatic control of the frequency for a radio telephone
12/10/1991US5072298 Auto-tuning circuit for an active filter used in video signal processing
11/1991
11/13/1991EP0455821A1 Receiver
11/13/1991CN1056200A Sync validity detection utilizing microcomputer
11/12/1991US5065244 Automatic fine tuning circuit
11/06/1991EP0455145A2 Sync validity detection utilizing a microcomputer
11/06/1991EP0455046A2 High speed automatic frequency tuning method
10/1991
10/30/1991EP0454266A2 Receiver comprising a circuit for estimating frequency offset
10/17/1991DE4039117A1 Automatic station selection process for RDS preselect receiver - using stored list of alternative network frequencies to initiate follow-up tuning sequence if required
10/16/1991EP0452212A1 Method for tuning at least one frequency variable filter of a filter arrangement to a new selected frequency and system for the elaboration of this method
10/09/1991EP0450268A2 A radio station presetting method for radio receivers
10/02/1991EP0448729A1 Tune detecting circuit
10/02/1991DE4009729A1 Converter for digital radio receiver system - uses phase locked loop controlled by DC voltage to provide reference mixer signal
09/1991
09/25/1991EP0447411A1 A method and a device pertaining to an electro-mechanically controlled resonance module.
09/25/1991CN1054866A Stability detection method and apparatus for tuning system
09/24/1991US5052049 Paging receiver with continuously tunable antenna
09/24/1991US5051829 Method for automatically controlling optimal tuning point for receiving teletext
09/11/1991EP0445885A1 Receiver with means for acquisition and comparison of identification data of two transmission channels
09/10/1991US5048119 Broadcast receiver for radio or television signals with storage and interchange of preset stations
09/03/1991US5046140 Automatic optical frequency acquisition and tracking apparatus for optical coherent communication system
08/1991
08/21/1991EP0441851A1 Satellite radio receiver
08/14/1991EP0441593A2 Automatic frequency control circuit
08/08/1991DE4003417A1 Verfahren zum abgleich analoger schaltungsteile innerhalb einer integrierten schaltung Method of adjustment-analog circuit components within an integrated circuit
08/06/1991WO1991011857A1 Device for equalizing analog circuit parts in an integrated circuit
07/1991
07/31/1991EP0439326A2 Digitally frequency-locking a radio transceiver to the received signal
07/31/1991EP0438694A1 Method and device for the storage of programmes in a television receiver
07/25/1991DE4001832A1 Channel search in digital radio transmission - uses transmitting radio station, and examining allocated radio channels for signal-free state
07/24/1991EP0437731A1 TV receiver apparatus with a transmitter scanning device and a memory for storing individual items of TV transmitter information
07/23/1991US5034819 Channel selecting apparatus and method used in a television receiving apparatus and capable of memorizing channel data
07/11/1991DE4040814A1 Channel scanning equipment for programming VTR - scans channels for TV synchronisation signals comparing programming data with video-text data
07/03/1991EP0434941A1 Circuit arrangement for applying an AFC signal
07/02/1991US5029237 Radio receiver frequency control system
06/1991
06/26/1991EP0433596A2 Method and apparatus for suppressing undesired automatic transmitter change-over
06/19/1991EP0432736A1 Programme storage method in television receivers
06/13/1991WO1991008618A1 Receiver
06/12/1991EP0431694A1 FM receiver for radio data signals
06/12/1991EP0221189B1 Electronically tunable fm receiver
06/12/1991CN1052231A Circuit arrangement for introducing afc signals
06/11/1991US5023941 Switching-over, automatic matching filter for radio transmitter and/or receiver
05/1991
05/28/1991US5020142 Automatic scanning tuner
05/28/1991US5019792 Signal tracking electronically tunable filter
05/23/1991DE4033538A1 TV signal data abstracting device - uses data from teletext to control TV receiver and video recorder
05/22/1991EP0428173A2 Radio frequency signal amplifying circuit in radio receiver
05/22/1991EP0428170A2 Radio receiver comprising automatic gain controlling function
05/08/1991EP0426175A2 Am radio receiver
05/07/1991US5014352 Frequency difference detector (FDD) and a carrier modulated receiver including such a FDD
05/07/1991US5014350 Apparatus for and method of improving the AFC of a television broadcast satellite receiver
05/07/1991US5014348 Self-programming scanning radio receiver
05/02/1991WO1991006150A1 Tune detecting circuit
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