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)
08/1982
08/31/1982US4347628 Rotary tuning mechanism
08/24/1982US4346480 Frequency identification circuit
08/24/1982US4346477 Phase locked sampling radio receiver
08/24/1982CA1130450A1 Phase tracking loop circuit
08/10/1982US4344187 Radio receiver with system for maintaining optimum tuning
08/10/1982US4344186 Tuning circuit
08/10/1982US4344038 Low frequency tone detector
08/03/1982US4343001 Digitally tuned electrically small antenna
08/03/1982CA1129126A1 Tuning system including a memory for storing tuning information with user controls arranged to facilitate its programming
07/1982
07/20/1982US4340864 Frequency control system
07/13/1982US4339829 Automatic tuning system for a narrow bandwidth communication
07/13/1982US4339826 Radio receiver having phase locked loop frequency synthesizer
07/13/1982CA1127782A1 Channel selection apparatus tunable to destined frequency in short time
07/06/1982CA1127330A1 Tuner with aft
07/06/1982CA1127292A1 Synchronizing signal detector particularly for use in television aft
06/1982
06/29/1982US4337486 Synchronizing signal discriminator for use in channel selection apparatus of television receiver
06/22/1982US4336534 Control generator for use in broadcast receiver including improved signal level indicator
06/08/1982US4334318 Broadcast receiver tuning circuit
06/08/1982CA1125444A1 Tuning apparatus
06/08/1982CA1125443A1 Wide window tuning system
06/08/1982CA1125394A1 Process for recovering a modulation signal
06/02/1982EP0052900A1 Signal comparison circuit
06/01/1982CA1124902A1 Memory control circuit
06/01/1982CA1124850A1 Aft circuit
05/1982
05/26/1982EP0052289A2 Voltage follower amplifier
05/25/1982CA1124420A1 Display system for facilitating the setup of a tuning system
05/18/1982US4330867 Channel selection data memory device
05/18/1982US4330866 Arrangement for selectively routing a signal indicative of received signal strength to different portions of a radio receiver in response to different levels of a control signal
05/18/1982CA1123918A1 Frequency counting apparatus
05/05/1982EP0050876A1 Signal detector circuit
04/1982
04/28/1982EP0050392A1 Automatic frequency control system
04/28/1982EP0050239A1 Method of comparing the modulation of two broadcast signals and circuit for carrying out this method
04/28/1982EP0050201A1 Push button unit
04/27/1982CA1122660A1 Automatic fine tuning circuit
04/20/1982US4326296 Tuning system for a color television receiver having a varactor tuner
04/15/1982WO1982001292A1 Mechanical tuner with microphonics elimination circuitry
04/13/1982US4325040 Apparatus for automatic adjustment of an inductor in a tuned circuit
03/1982
03/24/1982EP0048200A1 Tuning-frequency search device for a frequency-modulation radio receiver
03/23/1982US4321624 AFT Circuit
03/16/1982US4320533 Frequency stabilized downconverter facilitating output frequency alteration
03/16/1982US4320530 Channel selecting apparatus employing frequency synthesizer
03/16/1982US4320529 Frequency counting apparatus
03/09/1982CA1119670A1 Continuously synchronized tracking receiver for a priori defined swept carrier
02/1982
02/23/1982US4317225 Channel identification apparatus useful in a sweep type tuning system
02/23/1982CA1118840A1 Center frequency tuning system for radio-frequency signal receiver
02/16/1982US4316108 Tracking filter for FM threshold extension
02/09/1982US4315332 Electronic timepiece radio
01/1982
01/26/1982US4313219 Receiver for high frequency electromagnetic oscillations having a frequency readjustment
01/26/1982US4313214 Electronic tuning radio receiver
01/26/1982US4313212 Electrical circuit arrangements, for example for use with communications receivers
01/13/1982EP0043536A2 Control system to adjust a physical value
12/1981
12/22/1981US4307422 Receiver arrangement
12/15/1981US4306309 Memory control circuit for a television receiver
12/08/1981US4305159 Compressive receiver
12/08/1981US4305157 Tuning circuit using a phase-locked loop
11/1981
11/24/1981US4302778 AFT-wide automatic frequency control system and method
11/24/1981US4302738 Noise rejection circuitry for a frequency discriminator
11/17/1981CA1112724A1 Apparatus for receiving signals in plural frequency bands
11/10/1981US4300238 Control assembly for electronic tuning receivers
11/10/1981US4300165 Dual mode automatic fine tuning
11/04/1981EP0038827A1 Improved tracking filter for fm threshold extension
11/03/1981US4298989 Tuning apparatus
10/1981
10/27/1981CA1111581A1 Tuning system equalized with the slope factor of the tuning curve
10/06/1981CA1110356A1 Mesfet device surface-wave-device channel selector
09/1981
09/29/1981US4292686 Tuning system for receiver of pilot-modulated carrier waves
09/29/1981US4292594 Method and apparatus for carrier regeneration and synchronous amplitude demodulation
09/23/1981EP0036086A1 VHF mobile radio with two receiving sections and with two signal seeking devices
09/22/1981US4291414 Radio receiver operable in station search mode or station select mode
09/22/1981US4291413 Search type tuning system with direct address channel selection apparatus
09/15/1981US4290029 Digital phase control circuit including an auxiliary circuit
09/01/1981US4287599 Multi-channel communication device with manual and automatic scanning electronic channel selection
09/01/1981CA1108322A1 Television tuning system with provisions for receiving rf carrier at nonstandard frequency
09/01/1981CA1108321A1 Frequency counter for a television tuning system
08/1981
08/19/1981EP0034064A2 Adjustable and selective electrical filters and methods of tuning them
08/18/1981US4285066 Receiver having a search tuning circuit
08/18/1981CA1107418A1 Channel selecting apparatus for use with plural tuning devices
08/11/1981US4283792 Automatic fine tuning circuit
08/11/1981US4283739 Color television receivers
08/11/1981CA1106984A1 Electronic tuning system
08/04/1981US4282603 Synthesizer tuner
08/04/1981US4282602 Channel signal detection circuit for scanning receivers
07/1981
07/29/1981EP0032878A2 Radio receiver
07/22/1981EP0032276A1 Signal Processing Apparatus
07/21/1981US4280140 Microcomputer-controlled one-step-back automatic frequency control tuning system
06/1981
06/30/1981US4276654 Scan-lock control of solid state digitally synthesized receivers
06/02/1981US4271533 AFC Interface circuit
06/02/1981US4271532 Receiver with a channel swapping apparatus
06/02/1981US4271530 Receiver having a frequency synthesizing circuit
06/02/1981US4271434 Channel selector
05/1981
05/26/1981US4270219 Channel selection apparatus tunable to destined frequency in short time
05/26/1981US4270213 Sequential channel selector system
05/26/1981US4270209 Digital compressive receiver
05/19/1981US4268915 Universal automotive electronic radio with display for tuning or time information
05/19/1981US4268862 Synchronizing signal detector particularly for use in television AFT
05/12/1981US4267603 Memory control circuit
05/12/1981US4267602 Acquisition delay circuit for a PLL reference oscillator
05/06/1981EP0028100A1 Tuning control apparatus for a receiver
05/05/1981CA1100623A1 Apparatus for shifting a tuning window
04/1981
04/28/1981US4264977 Search type tuning system
04/28/1981US4264976 Tuning control apparatus for digital tuner
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