Patents for H03J 7 - Automatic frequency control; Automatic scanning over a band of frequencies (3,745) |
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04/30/1991 | US5012235 Paging receiver with continuously tunable antenna and RF amplifier |
04/16/1991 | US5008955 Receivers with microcomputer controlled tuning |
04/03/1991 | EP0420275A2 Automatic frequency control method and receiving apparatus using thereof |
04/02/1991 | US5004989 Oscillator for controlling a mixer stage in a tuner |
03/26/1991 | US5003621 Direct conversion FM receiver |
03/26/1991 | US5003397 Television receiver including a tuning circuit which comprises a frequency synthesis circuit |
03/06/1991 | EP0415610A2 Radio receiver |
03/05/1991 | US4998217 Sweep generator linearization system and method |
02/21/1991 | DE3926984A1 Car radio and cassette player - monitors radio stations enabling automatic over riding of cassette player |
02/19/1991 | US4995098 Adaptive scanning method |
02/13/1991 | EP0412207A1 Automatic frequency control circuit |
02/06/1991 | EP0411566A1 Automatic optical frequency acquisition and tracking apparatus for optical coherent communication system |
02/02/1991 | WO1991002413A1 Radio receiver frequency control system |
02/02/1991 | CA2064895A1 Radio receiver frequency control system |
01/29/1991 | US4989263 Radio receiver with automatic mode changeover circuit |
01/16/1991 | EP0228433B1 Frequency dividing arrangements |
01/09/1991 | EP0406851A2 Station selecting apparatus |
01/02/1991 | CN1011106B Radio receiver having wide-band automatic gain controlling circuit |
12/30/1990 | WO1991000654A1 Low voltage afc switch |
12/30/1990 | CA2064804A1 Low voltage afc switch |
12/27/1990 | CA1278393C Television receiver |
12/04/1990 | US4975775 Tuner for receiving television signal in frequency division multiplex system and television signal in time division multiplex system |
12/04/1990 | CA1277373C Tweet elimination, or reduction, in superheterodyne receivers |
11/29/1990 | DE4002616A1 Scanning channels for programming memory in VCR or TV - memorising channel frequency when synchronising circuit is detected, and de-tunes circuit if not |
11/13/1990 | US4970473 For tuning video frequencies |
11/07/1990 | EP0396103A2 Channel selecting apparatus |
10/31/1990 | EP0395058A2 Method for automatically controlling optimal tuning point for receiving teletext |
10/23/1990 | US4965853 Radio receiver circuit with tuning feedback control for a tunable bandpass filter |
10/18/1990 | WO1990012457A1 Frequency control apparatus and method for a digital radio receiver |
10/10/1990 | CN1046074A Frequency control apparatus and method for digital radio receiver |
10/03/1990 | EP0389974A1 Frequency control apparatus and method for a digital radio receiver |
10/03/1990 | EP0389493A1 Tvro receiver system with automatic bandwidth adjustment |
09/29/1990 | WO1990011653A1 Paging receiver with continuously tunable antenna and rf amplifier |
09/29/1990 | CA2049969A1 Paging receiver with continuously tunable antenna and rf amplifier |
09/26/1990 | EP0389012A1 Broadcast receiver for radio or television signals, including a memory for storing preset stations |
09/25/1990 | US4959872 Automatic frequency control apparatus for FM receivers |
09/19/1990 | EP0387294A1 Crystal controlled magnetron |
09/11/1990 | US4956711 Automatic balancing system for communications receiver apparatus |
09/05/1990 | EP0385147A2 Apparatus for controlling the reception capacity of radio alarm receivers |
09/05/1990 | EP0315686A4 Dual port fm demodulation in phase locked receivers |
09/04/1990 | US4955078 Frequency difference detector (FDD) having automatic gain control and a carrier modulated receiver including the FDD |
09/04/1990 | US4955077 Radio with broad band automatic gain control circuit |
09/04/1990 | US4955074 AFC apparatus with selection between average value mode and keyed mode |
09/04/1990 | US4955073 Automatic search tuner |
09/04/1990 | US4954785 Auto tracking notch filter using switched capacitors to measure harmonic distortion and noise contained in a signal source |
08/14/1990 | US4949091 Spectrum analysis arrangement and automatic interception receiving station comprising such an arrangement |
07/31/1990 | US4945415 Slew enhancement circuit for an automatic frequency control system |
07/31/1990 | CA1272315A1 Cordless telephone |
07/24/1990 | US4944025 Direct conversion FM receiver with offset |
07/10/1990 | US4941204 Generating a stop signal of an automatic search procedure for a broadcasting station using an available AFC signal |
07/10/1990 | US4941050 An afc arrangement for tuning a television receiving apparatus to a select transmission having an actual carrier frequency which differs from a nominal carrrier frequency |
07/03/1990 | US4939473 Tracking harmonic notch filter |
06/28/1990 | WO1990007233A1 Digital automatic frequency control on pure sine waves |
06/27/1990 | EP0375034A2 Oscillator for supplying a mixer stage in a tuner |
06/20/1990 | EP0373517A2 Digital automatic frequency control on pure sine waves |
06/19/1990 | CA1270582A1 Tracking yig tuned filter-mixer |
06/19/1990 | CA1270529A1 System for automatically tuning the antenna of a miniature portable communications device |
06/14/1990 | WO1990006627A1 A method and a device pertaining to an electro-mechanically controlled resonance module |
06/13/1990 | EP0372430A2 Automatic antenna tuning |
06/13/1990 | CN1043051A 自适应扫描方法 Adaptive scanning method |
06/07/1990 | DE3840707A1 Control circuit for a broadcast receiver |
06/05/1990 | US4932074 Rapid scanning radio with multi-mode local oscillator control |
06/05/1990 | US4932072 Mobile station equipment for a mobile radio telephone system |
05/23/1990 | CN1042460A Satellite radio receiver |
05/17/1990 | WO1990005410A1 Satellite radio receiver |
05/09/1990 | EP0367214A1 Satellite broadcast receiver |
05/08/1990 | US4924300 Method of and device for tuning a resonant circuit coupled to a frequency discriminator |
05/01/1990 | US4921467 Local oscillators for radio receivers |
04/25/1990 | EP0364749A2 Radio receiver |
04/24/1990 | US4919640 Auto tuning apparatus |
04/18/1990 | EP0364035A2 Radio receiver circuit arrangement |
04/17/1990 | CA1267980A1 Television tuning system with provisions for quickly locating active cable channels |
04/05/1990 | WO1990003696A1 Tvro receiver system with automatic bandwidth adjustment |
03/29/1990 | DE3833164A1 Audio-abstimmsystem zum empfangen und abstimmen von adio-zwischentraegersignalen in einem tvro-system Audio-tuning to receive and vote of adio-zwischentraegersignalen in a TVRO system |
03/27/1990 | US4912527 Optical apparatus for pulling an intermediate frequency in a predetermined frequency range |
03/22/1990 | WO1990003069A1 Adaptive scanning method |
03/20/1990 | US4910470 Digital automatic frequency control of pure sine waves |
03/14/1990 | EP0357876A2 Method for the optimisation of the tuning of a transmitter, and arrangement for realising the method |
03/13/1990 | US4908582 AFC circuit for producing a ripple-free oscillator control voltage |
03/07/1990 | EP0148389B1 Tuning system for a television receiver |
02/28/1990 | CN1007030B Receiver provided with an automatic frequency control loop |
02/21/1990 | EP0354986A2 A method and circuitry for automatic control, according to the counter principle, of the frequency of a radio telephone |
02/20/1990 | US4903328 Automatic frequency sweeping method for controlling a frequency synthesizing type autotuner |
01/31/1990 | EP0352853A1 Television receiver including a tuning circuit which comprises a frequency synthesis circuit |
01/30/1990 | USRE33157 Null initiated method and system for monitoring a priority channel |
01/30/1990 | US4897727 Television tuning system allowing rapid response to user initiated commands |
01/02/1990 | US4891708 Voltage superposing circuit for an electronic tuner |
12/20/1989 | EP0346623A2 A circuit for high-efficiency tuning video frequencies |
12/12/1989 | US4887050 Frequency control apparatus and method for a digital radio receiver |
12/06/1989 | EP0344991A2 AFC apparatus |
11/29/1989 | EP0343336A2 Automatic frequency control |
11/23/1989 | EP0342728A1 Television receiving apparatus |
11/23/1989 | EP0342277A1 Tweet elimination, or reduction, in superheterodyne receivers |
11/15/1989 | EP0341238A1 Automatic antenna tuning system for portable communication devices. |
11/07/1989 | US4879757 Tweet elimination, or reduction, in superheterodyne receivers |
11/02/1989 | EP0339647A2 Apparatus for and method of receiving satellite broadcasting |
10/11/1989 | EP0336650A2 Self-programming scanning radio receiver |
10/04/1989 | EP0335370A2 Automatic frequency control circuit |
10/03/1989 | US4872207 Automatic IF tangent lock control circuit |
09/27/1989 | CN1035924A Radio station having wide-band automatic gain controlling circuit |