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)
11/1983
11/22/1983US4417220 Adjustable and selective electrical filters and methods of tuning them
11/22/1983CA1157524A1 Channel selecting system for use in a multi-channel mobile communication system
11/09/1983EP0093205A1 System for transmitting programme or data signals
11/01/1983CA1156385A1 Channel identification apparatus useful in a sweep type tuning system
10/1983
10/27/1983WO1983003726A1 Program-selecting device
10/25/1983CA1155929A1 Channel signal detection circuit for scanning receivers
10/25/1983CA1155928A1 Sequential channel selector system
10/18/1983CA1155570A1 Aft-wide automatic frequency control system and method
10/13/1983WO1983003502A1 Up/down counter control circuit
10/12/1983EP0091067A1 Method of switching over the reproduction of one radio signal to another
10/11/1983CA1155242A1 Digital frequency lock tuning system
10/04/1983US4408351 Directly mixing receiving system
10/04/1983US4408349 Receiver provided with a frequency synthesizer capable of storing fine tuning information
10/04/1983US4408347 High-frequency channel selector having fixed bandpass filters in the RF section
09/1983
09/20/1983US4406018 Automatic FM tuner
09/20/1983US4405947 Dual search mode type tuning system
09/20/1983CA1154098A1 Search type tuning system with direct address channel selection apparatus
09/06/1983US4403349 Intermediate frequency detection circuit
09/06/1983US4403345 Device for detecting the tuning frequency of a frequency modulation radio receiver
08/1983
08/16/1983US4399560 Double phase lock loop arrangement
08/16/1983US4399463 Signal detector circuit
08/09/1983US4398303 Signal-seeking tuning system with automatic bandswitching for a television receiver
08/09/1983CA1151735A1 Broadcast signal receiving system for directly recovering the modulating signal from a received modulated high frequency signal
08/03/1983EP0084876A2 Demodulator arrangement for signals which are frequency-modulated on a carrier wave
08/02/1983USRE31335 Search tuning system for television receiver
08/02/1983CA1151328A1 Aft arrangement for a phase locked loop tuning system
07/1983
07/26/1983CA1150773A1 Receiver having a search tuning circuit
07/20/1983EP0083823A1 Frequency synthesizing circuit
07/20/1983EP0083706A1 Digital-analogue converter
07/19/1983US4394778 Tuning control apparatus of receiver
07/12/1983CA1149978A1 Search type tuning system
07/05/1983US4392254 Mechanical tuner with microphonics elimination circuitry
07/05/1983US4392253 Phase locked loop circuit
07/05/1983US4392249 Electronic channel selection apparatus with surface acoustic wave device
07/05/1983US4392247 Broadcast receiver with search tuning
06/1983
06/28/1983CA1149024A1 Receiver having a frequency synthesising circuit
06/21/1983US4389732 Tuning device for radio receiver
06/15/1983EP0081424A1 Radio receiver with a fully electronic control arrangement
06/15/1983EP0081172A1 Radio receiving device
06/14/1983US4388649 AFT Lockout prevention system
06/08/1983EP0080922A1 Device for the detection of the optimum anode charge impedance of a tube transmitter
06/07/1983US4387401 Carrier detector apparatus useful in a multiband sweep type tuning system
05/1983
05/24/1983US4385315 Phase locked loop tuning control system including a timed sync activated AFT signal seeking arrangement
05/18/1983EP0079097A1 Auto-tuned frequency discriminator
05/11/1983EP0019630B1 Intermediate frequency sensing circuit
05/10/1983US4383333 AM Radio having an automatic fine tuning circuit
04/1983
04/26/1983CA1145490A1 Receiver with a channel swapping apparatus
04/26/1983CA1145402A1 Automatic turn-off apparatus for a radio or television receiver
04/20/1983EP0077248A1 Device for the reduction of the number of false alarms and receiver comprising such a device
04/19/1983US4380826 Control system for channel selection
04/19/1983US4380825 Automatic sweep digital tuning circuit
04/19/1983CA1144989A1 Command signal generator for an automatic channel selection device in a radio receiver which is mobile relative to transmitter stations
04/06/1983EP0076009A1 Tuning circuit incorporating a frequency synthesizer circuit
03/1983
03/30/1983EP0075332A2 Receiver circuit
03/29/1983US4378604 Receiver having a search tuning circuit
03/15/1983US4377004 Setting circuit
03/08/1983CA1142661A1 Manual channel selecting device
03/08/1983CA1142660A1 Electronic tuning radio receiver
03/08/1983CA1142596A1 Intermediate frequency detection circuit
03/02/1983EP0072943A2 Tuning system for high-frequency receivers
03/01/1983CA1142237A1 Radioelectric apparatus for collecting data coming from several stations
02/1983
02/22/1983CA1141827A1 Am broadcast tuner with automatic gain control
02/22/1983CA1141826A1 Automatic frequency control system
02/15/1983US4374437 Variable ramp speed TV tuning system for rapid channel tuning
02/08/1983US4373209 Method and circuitry for controlling the intermediate frequency of an FM receiver to lessen phase distortion
02/08/1983US4373208 Circuit arrangement for tuning into one of a number of radioelectric signals
02/08/1983CA1141050A1 Antenna automatic tuning apparatus
01/1983
01/18/1983US4369417 Circuit for tunable radio-frequency circuits
01/11/1983US4368540 Phase locked loop tuning system including a prescaler conditioned to oscillate at an out-of-band frequency
01/11/1983US4368539 Transmitter detector
01/04/1983US4367559 Arrangement for both channel swapping and favorite channel features
12/1982
12/21/1982US4365347 Channel selecting system for use in a multi-channel mobile communication system
12/14/1982US4364094 Digital arrangement for detecting a correct television synchronization signal output useful in a signal seeking tuning system
12/14/1982US4364026 Digital-to-analog converter useful in a television receiver
12/07/1982US4363134 Channel selection apparatus
12/07/1982US4363133 Converter circuit for television signals
12/07/1982CA1137236A1 Continuous tuning arrangement for a multiband television receiver
12/07/1982CA1137235A1 Continuous tuning arrangement for a multiband television receiver
12/07/1982CA1137234A1 Memory control circuit for a receiver
11/1982
11/30/1982US4361908 Channel search and selection system for television receiver
11/30/1982US4361907 Direct access channel selection apparatus for a digital tuning system
11/30/1982US4361906 Channel selector having a plurality of tuning systems
11/23/1982CA1136222A2 Mesfet device surface-wave-device channel selector
11/16/1982CA1135884A1 Aft circuit
11/09/1982CA1135426A1 Channel selecting apparatus employing frequency synthesizer
11/09/1982CA1135403A1 Aft circuit
11/02/1982US4357712 Radio receiver
11/02/1982US4357632 Search type tuning system with synchronization signal presence transition detector
10/1982
10/26/1982CA1134520A1 Tuning apparatus
10/19/1982US4355414 Automatic gain control system
10/05/1982US4353131 Touch actuated electronically tuned receiver
09/1982
09/28/1982US4352206 Comparison arrangement for a digital tuning system
09/28/1982US4352205 Tuning system
09/21/1982CA1132272A1 Channel selector
09/14/1982CA1131721A1 Hangup corrector useful in locked loop tuning system
09/14/1982CA1131710A1 Automatic frequency control system for single sideband signal receiver
09/07/1982US4348772 Frequency stabilization circuit for a local oscillator
09/07/1982US4348770 Manual channel selection apparatus
09/01/1982EP0058934A1 Radio monitoring system
09/01/1982EP0011646B1 Electronically tuned radio receiver
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