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)
09/1985
09/17/1985CA1193771A1 Tuning circuit incorporating a frequency synthesizer circuit
09/10/1985US4541110 Circuit for automatic selection between speech and music sound signals
09/10/1985CA1193320A1 Device for detecting the optimum anode load impedance of a tube transmitter in a high frequency transmission chain
09/03/1985US4539712 Delay circuit
08/1985
08/27/1985US4538300 Linear signal strength detector in AM radio
08/13/1985CA1191976A1 Phase locked loop tuning control system
08/07/1985EP0150297A2 Method for the identification of radio transmitters and radio apparatus therefor
08/06/1985US4533880 Tuning circuit with frequency synthesizer using d/a converter
07/1985
07/24/1985EP0149117A2 Method for the automatic search of a transmitter and searching receiver for the realisation of this method
07/17/1985EP0148389A2 Tuning system for a television receiver
07/09/1985USRE31943 Multichannel coherent receiver
07/09/1985US4528698 Tuning system for RF receiver
07/02/1985US4527281 Auto-scan changeover system for two-band radio receiver employing PLL frequency synthesizers
06/1985
06/25/1985US4525866 System for tuning a television receiver
06/25/1985US4525864 Device for generating a tuning frequency set command signal of a tuner system
06/25/1985US4525790 Method for oscillating ultrasonic waves and a microcomputer's built-in ultrasonic wave oscillator circuitry
06/11/1985US4523190 Switching system
06/11/1985CA1188742A1 Fm receiver with subcarrier decoding circuit
05/1985
05/28/1985CA1187944A1 Spectrum surveillance receiver system
04/1985
04/23/1985US4513443 Radio receiver suitable for use in a spaced carrier area coverage system
04/16/1985US4511923 Method for tuning the input stage of a receiver to a desired receiving frequency and circuit arrangement for carrying out the method
04/16/1985US4511869 Radio circuit tuned by adjustably deforming an inductance coil
04/09/1985CA1185359A1 Aft lockout prevention system
04/03/1985EP0135970A2 Receiver comprising a search tuning circuit
04/02/1985US4509204 AM Radio stop detector
04/02/1985US4509203 Auto tuning receiver with a tuning information memory
03/1985
03/19/1985US4506227 Mass spectrometer
03/12/1985US4504973 Electromagnetic wave receiver system
03/06/1985EP0133730A2 Receiver circuit
03/05/1985US4503465 Analog signal comparator using digital circuitry
02/1985
02/19/1985US4501020 Spectrum surveillance receiver system
01/1985
01/29/1985CA1181879A1 Electronic tuning radio receiver
01/29/1985CA1181878A1 Channel selection system for an electronic tuner
01/22/1985US4495651 Broadcast receiver comprising an entirely electronic control device
01/22/1985US4495650 Electronic tuning type radio receivers
01/15/1985US4494238 Multiple channel data link system
01/08/1985US4493102 Process and apparatus for alternately switching radio signals over respective audio channels
01/01/1985US4491976 Wide-band tuner having a temperature-compensated microstrip resonator arrangement
01/01/1985US4491975 Radio receiver of electronic tuning system having automatic presetting circuit
12/1984
12/27/1984CA1180139A Tuner apparatus
12/27/1984CA1180054A Double phase lock loop arrangement
12/18/1984US4489413 Apparatus for controlling the receive and transmit frequency of a transceiver
11/1984
11/27/1984US4485404 Digital aft system which is activated during vertical retrace intervals
11/21/1984EP0125717A1 Broadcast receiver with automatic broadcast station storage
11/20/1984US4484356 Apparatus and method for acquiring and processing radio signals received at different frequencies
11/20/1984US4484291 Comparison circuit for determining the statistical equality of two analog signals
11/20/1984US4484221 Shared counter arrangement for a digital frequency locked loop tuning system for selectively measuring the frequencies of the LO and IF signals
11/07/1984EP0124332A2 A double conversion tuner
10/1984
10/23/1984US4479255 Apparatus for acquiring and collecting radio signals coming from a plurality of stations
10/23/1984US4479249 Apparatus for collecting and processing messages transmitted at different signal frequencies
10/23/1984US4479248 Frequency synthesized tuning system using a microprocessor
10/23/1984CA1176767A1 Receiver provided with a frequency synthesizer capable of storing fine tuning information
10/23/1984CA1176718A1 Amplifier
10/09/1984US4476585 Baseband demodulator for FM signals
10/09/1984US4476584 Digital frequency lock tuning system
10/09/1984US4476583 Electronic tracking for tuners
10/09/1984US4476581 FM Receiver with subcarrier decoding circuit
10/09/1984US4476579 Electronic tuning radio receiver
10/09/1984US4476578 Device for detecting the optimum anode load impedance of a tube transmitter in a high frequency transmission chain
10/02/1984CA1175586A1 Television frequency synthesizer for nonstandard frequency carriers
10/02/1984CA1175491A1 Phase locked loop tuning system including a prescaler conditioned to oscillate at an out-of-band frequency
09/1984
09/26/1984EP0119561A2 Method of tuning the resonant circuits of a radio receiver
09/05/1984EP0117499A2 Circuit arrangement for measuring and detecting a maximum voltage output
08/1984
08/22/1984EP0116350A1 Tunig unit for communication apparatus
08/16/1984WO1984003184A1 Tuning unit for communication system
08/14/1984US4466128 Automatically centered pulsed FM receiver
08/14/1984US4466127 Entry apparatus of digital value in memory
07/1984
07/31/1984CA1171911A1 Signal detector circuit
07/24/1984US4462009 For filtering signals between a signal source and a load
07/24/1984CA1171464A1 Receiver having a search tuning circuit
07/17/1984US4461037 Automatic tuning system for television receiver
07/17/1984US4461034 Unlocking attenuator for automatic tuning receiver
07/03/1984CA1170354A1 Aft circuit
06/1984
06/12/1984US4454484 Phase-locked loop including an amplifier circuit arrangement
06/05/1984US4453136 AFC System for controlling an oscillator according to an input frequency
05/1984
05/29/1984US4451850 Channel selecting device
05/29/1984US4451792 Auto-tuned frequency discriminator
05/22/1984US4450588 Tuning system for a high frequency receiver utilizing a controllable inductor
05/22/1984US4450587 Tuning arrangement for providing relatively uniform automatic fine tuning sensitivity
05/22/1984US4450586 Automatic tuning device for FM receiver
05/22/1984US4450518 Control system for adjusting a physical quantity
04/1984
04/25/1984EP0105932A1 Program-selecting device
04/18/1984EP0105378A1 Up/down counting arrangements
04/10/1984US4442413 Television receiver phase locked loop tuning arrangement
04/04/1984EP0104688A1 Receiver comprising a search tuning circuit
04/03/1984CA1165023A1 Mechanical tuner with microphonics elimination circuitry
03/1984
03/27/1984US4439787 AFT Circuit
03/27/1984CA1164571A1 Digital-to-analog converter useful in a television receiver
03/20/1984US4438528 Channel selection system for an electronic tuner
03/20/1984US4438412 In a circuit arrangement
01/1984
01/31/1984US4429415 Signal-seeking tuning system with signal loss protection for a television receiver
01/24/1984CA1161167A1 Setting circuit
01/24/1984CA1161117A1 Converter circuit for television signals
01/18/1984EP0098634A1 Receiver for FM-signals with transmitter status code storage
01/17/1984US4426734 Arrangement useful in a phase locked loop tuning control system for selectively applying an aft voltage in a manner to improve loop stability
01/03/1984CA1159915A1 Adjustable and elective electrical filters
12/1983
12/07/1983EP0095564A1 Mobile broadcast receiver, such as a car radio or the like
12/06/1983US4419767 Automatic digital control device for exact frequency tuning of a receiver
12/06/1983US4419639 Key assembly
12/06/1983CA1158372A1 Channel identification apparatus useful in a multiband sweep type turning system
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