Patents
Sitemap › H03 - Basic electronic circuitry › H03J - Tuning resonant circuits; Selecting resonant circuits › H03J 7 - Automatic frequency control; Automatic scanning over a band of frequencies
Patents for H03J 7 - Automatic frequency control; Automatic scanning over a band of frequencies (3,745)
09/1989
09/26/1989US4870492 Television receiver having automatically programmable skip channel list
09/20/1989EP0333194A2 Radio data system receiver
09/19/1989US4868891 Interrupted audio fill-in system for noise reduction and intelligibility enhancement in multi-channel scanning receiver applications
09/19/1989CA1259662A1 Shf receiver
09/12/1989CA1259378A1 A.f.c. system for broad-band fm receiver
09/07/1989DE3905860A1 Spannungsueberlagerungsschaltung fuer einen elektronischen kanalwaehler oder tuner Voltage superposition circuit for an electronic tuner or kanalwaehler
09/05/1989US4864639 Self-test device and method having an amplifier converted into an oscillator
08/1989
08/31/1989DE3901094A1 Motor vehicle broadcast receiver
08/29/1989US4862516 System for automatically tuning the antenna of a miniature portable communications device
08/29/1989US4862515 Frequency dividing arrangements
08/23/1989EP0329525A1 Switchable self-adaptive filter for a transmitter and/or radio receiver apparatus
08/08/1989US4856082 Reception sensitivity control system in a sweeping receiver
08/08/1989US4855835 AFT circuit for CATV receiver system
08/08/1989US4855689 Phase lock loop with switchable filter for acquisition and tracking modes
08/02/1989EP0326527A2 Generating a stop signal of an automatic search procedure for a broadcasting station using an available AFC signal
06/1989
06/27/1989US4843636 Television receiver having an automatic radiofrequency resonant circuit adjustment circuit
06/27/1989US4843634 High power systems and method of tuning same
06/06/1989US4837853 Dual port FM demodulation in phase locked receivers
06/01/1989WO1989004974A1 Crystal controlled magnetron
05/1989
05/30/1989US4835792 Universal FM receiver for mobile communications
05/30/1989US4835492 Voltage controlled oscillator having constant tuning bias voltage
05/24/1989EP0317360A2 Tuner for receiving television signal in frequency division multiplex system and television signal in time division multiplex system
05/24/1989EP0316879A2 Radio with broad band automatic gain control circuit
05/24/1989EP0316543A2 Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication
05/17/1989EP0315686A1 Dual port fm demodulation in phase locked receivers
05/16/1989US4831339 Oscillator having low phase noise
05/03/1989EP0314208A1 Frequency difference detector (FDD)having automatic gain control and a carrier modulated receiver including the FDD
04/1989
04/26/1989EP0313126A1 Frequency difference detector (FDD) and a carrier modulated receiver including such a FDD
04/26/1989EP0313121A1 Method and device for tuning a resonant circuit
04/13/1989DE3832887A1 Schaltungsanordnung fuer fernseh-/ rundfunkempfaenger und/oder videobandaufzeichnungsgeraete Circuit arrangement for tV / rundfunkempfaenger and / or video tape recorders
04/12/1989EP0311505A1 Panoramic receiver for radio signal surveillance
04/12/1989EP0311504A1 Process and arrangement for the automatic detection of radio signal radiation
04/04/1989US4818903 Time constant automatic adjustment circuit for a filter circuit
03/1989
03/28/1989US4817200 Tracking YIG tuned filter-mixer
03/28/1989US4817197 Mobile communication apparatus
03/28/1989US4817195 Channel selection apparatus having automatic frequency compensation for transmission frequency error
03/22/1989EP0307910A2 Signal locating apparatus
03/21/1989US4814887 Automatic frequency control
03/07/1989US4811424 Rapid phase correcting carrier recovery circuit
02/1989
02/28/1989US4809068 Clock signal generating circuit for television receiver
02/28/1989US4809004 Radar system
02/22/1989EP0303715A1 Receiver
02/14/1989US4805230 Tuning method
02/14/1989CA1250023A1 Broadcast signal detected indication system
02/09/1989DE3826150A1 Selbstprogrammierender empfaenger Self programming Ender empfaenger
02/08/1989EP0302290A2 Automatic frequency control system
01/1989
01/25/1989EP0300491A2 An optical apparatus for pulling an intermediate frequency in a predetermined frequency range
01/10/1989US4797636 Radio receiver
01/04/1989EP0297624A2 Automatic frequency sweeping method for controlling a frequency synthesizing type autotuner
01/03/1989US4796102 Automatic frequency control system
12/1988
12/22/1988DE3719650A1 Controller for radio time signal receiver
12/20/1988US4792988 Radio receiving circuit with a search tuning mechanism
12/15/1988WO1988010033A1 Dual port fm demodulation in phase locked receivers
11/1988
11/29/1988US4788547 Static-split tracking radar systems
11/17/1988EP0290825A2 Video recorder with a dynamically tunable tuner
11/08/1988US4783848 TVRO receiver system for locating audio subcarriers
11/01/1988US4782532 Automatic IF tangent lock control circuit
10/1988
10/26/1988CN88101130A Automatic if tangent lock control circuit
10/04/1988CA1242767A1 Automatic frequency and gain control circuit
09/1988
09/07/1988WO1988006820A1 Receiver
08/1988
08/31/1988EP0280389A2 Tranking YIG tuned filter-mixer
08/30/1988US4768219 Cordless telephone
08/25/1988WO1988006383A1 Improved phase lock loop
08/16/1988US4764737 Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication
08/09/1988US4763195 Television tuning system with provisions for quickly locating active cable channels
08/02/1988US4761825 TVRO earth station receiver for reducing interference and improving picture quality
07/1988
07/14/1988WO1988005214A1 Automatic antenna tuning system for portable communication devices
07/06/1988EP0273389A2 Channel selection apparatus having automatic frequency compensation for transmission frequency error
06/1988
06/28/1988US4754235 Frequency synthesizer with low power consumption
06/16/1988DE3738124A1 A circuit controlling the carrier wave of the FM synthesizer for a telephone system
06/15/1988EP0270819A2 Linear power control for ultrasonic probe with tuned reactance
06/01/1988DE3639576A1 Signal receiver
05/1988
05/31/1988US4748683 Electronic tuning type FM receiver
04/1988
04/13/1988CN85102345B Integrated electric filter circuit
04/12/1988CA1235238A1 Radio circuit
04/05/1988US4736458 Receiver provided with an automatic frequency control loop
03/1988
03/15/1988US4731874 Radio receiver having second receiver part for avoiding interference signals
03/15/1988US4731871 Tuning device for liquid crystal television
03/15/1988US4731868 Circuitry in a scanning receiver for speeding up the generation of a reception or non-reception criterion
03/10/1988WO1988001814A1 Broadcast signal detected indication system
02/1988
02/24/1988EP0256877A2 Reception sensitivity control system in a sweeping radio receiver
02/23/1988US4727591 Microprocessor controlled tuning system
02/16/1988US4726071 Microprocessor controlled self-tuning resonant cavity and method
02/11/1988DE3626792A1 Device for stabilising the transmitting and receiving frequency of a transmitting set
02/02/1988US4723319 Signal seeking radio with sensitivity reduction responsive to ambient light related parameter
01/1988
01/20/1988EP0253680A2 Angle modulated signal receiving apparatus
01/07/1988DE3621364A1 Video recorder and method for generating an identification signal in a video recorder
12/1987
12/30/1987WO1987007991A1 Local oscillation apparatus
12/22/1987US4715001 Extremely accurate automatic frequency control circuit and method therefor
12/08/1987US4712241 Broadcast signal detected indication system
12/08/1987CA1230165A1 Receiver circuit
12/01/1987US4710972 SHF receiver
11/1987
11/24/1987US4709408 Phased lock loop synchronous detecting system with an automatic frequency tuning circuit
11/24/1987US4709406 A.F.C. system for broad-band FM receiver
11/19/1987EP0245823A2 Method and circuit arrangement for thee tuning of a car radio
11/11/1987EP0245040A2 Radio beacon receiving method and apparatus
10/1987
10/06/1987US4698632 Radar detector
09/1987
09/30/1987EP0239219A2 High power systems
09/15/1987CA1226925A1 Switching system
09/01/1987US4691377 Automatic frequency and gain control circuit
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