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Match Document Document Title
7299016 Communication device with an adjustable brightness  
The present invention discloses a communication device with an adjustable brightness that includes a control circuit coupled to a modulating unit, and the modulating unit includes a tuning button d...
7283794 Low voltage digital interface  
A system is disclosed for interfacing a wireless communication device baseband module and a radio frequency integrated circuit. The system accepts a control signal from the baseband module. The con...
7280811 Multimode wireless terminal and wireless transmitter-receiver unit  
A multimode wireless terminal suitable for received level monitoring for a base station serving as an intersystem handover destination includes a first wireless transmitter-receiver unit for GSM, a...
7162214 Energy-saving method for the wireless reception of data modulated on a carrier signal  
An energy-saving method for wireless reception of data modulated on a carrier signal is carried out in a receiver circuit including a first group and a second group of circuit elements. The first g...
7103342 System and method for reducing the effects of clock harmonic frequencies  
A system and a method are provided for reducing the effects of spurious frequencies in a wireless communications device. The system comprises a processor having a reference frequency input and a cl...
7099685 Apparatus and method for providing multimedia service in a mobile terminal  
An apparatus provides a multimedia service in a mobile terminal. A main controller controls a call setup operation between the mobile terminal and a base station. A codec codes an audio signal outp...
6983128 Radio control transmitter and receiver  
Radio control is used for different types of models, e.g. aircraft, cars and boats. Commonly, a number of different radio channels are allocated in a frequency band for use in radio control. If a m...
6954625 Tuner and method of aligning a tuner  
A tuner comprises a first frequency changer with a mixer and local oscillator. The output of the frequency changer is connected to a first intermediate frequency filter, whose output is connected t...
6882691 Fine-frequency offset estimation  
Orthogonal frequency division multiplexing (OFDM) receiver embodiments of the invention demodulate quadrature amplitude modulated (QAM) signals transmitted in the five GHz frequency band and digita...
6834183 VCO gain tracking for modulation gain setting calibration  
Voltage controlled oscillator (VCO) gain tracking is used for programming modulation gain settings to minimize modulation distortion in a phase locked loop of a mobile station ( 10 ). A synthesizer...
6728522 Weather band radio and method of tuning same  
A mobile weather band radio and method of tuning the radio to select a signal channel based on geographic position. The radio has a weather band tuner adjustable for a plurality of radio wave signa...
6424825 Feedforward and feedback control in a radio  
A radio back-end circuit that includes a signal processing unit which receives an intermediate frequency signal containing modulated information. The radio back-end circuit processes the intermedia...
6366768 Circuit and method of frequency synthesizer control with a serial peripheral interface  
A remote wireless communication device ( 10 ) receives messages during windows occurring at predetermined intervals as determined by a communication protocol. The remote wireless communication devi...
5937338 Scanning radio receiver  
A scanning radio receiver of triple conversion superheterodyne tuning, having a CPU and a keyboard. The CPU has a programmable memory to store frequencies received by the scanning radio receiver. A...
5877701 Radio pager reporting frequency band information  
A radio pager of the present invention includes a non-volatile memory storing frequency information for each of a plurality of frequency bands for the confirmation of a frequency band. The frequenc...
5739874 Tuning system for a digital satellite receiver with fine tuning provisions  
An economical tuning system for a digital satellite television receiver includes a phase locked loop (PLL) tuning control IC of the which is normally used in a tuning system of a conventional terre...
5732336 Receiver  
A reception clock signal used for a data sampling unit to sample received data is generated by a reception clock generator based on a reference clock signal, which is generated by a reference clock...
5731741 Receiver frequency synthesizer-tuner providing high speed tuning  
An apparatus for acquiring tuning for a tuning frequency at a high speed. In a receiver, a tuning control unit holds inputted tuning frequency information at a designated address in accordance with...
5712595 Apparatus and method of setting variable dividing ratio and apparatus using the same  
A counter apparatus for setting a dividing ratio given as a sum of a fixed value and a variable value, including an upper-digits-setting circuit for setting upper digits of a series of digits repre...
5628060 Apparatus and method for selecting station using D/A converter to control the local oscillator  
An apparatus and a method for selecting a station are disclosed in which a count section or a comparison section compares/decides a local oscillation frequency, and a digital/analog converter contr...
5575000 Automatic broadcasting channel setting system and the method thereof  
An automatic broadcasting channel setting system and the method thereof for setting automatically a G-code channel, which is different according to respective districts, to a plus channel. Using G-...
5574995 Radio receiver with a high speed and accurate search operation and method thereof  
A controller shifts the frequency of the local oscillator with a frequency shift circuit so that as many channels to be scanned as possible will be included within specified bandwidths, detects a d...
5574985 Radio transmitter receiver for operation in plural radio systems having unequal bands of operating frequencies represented by channel numbers  
A radio device for operation in at least two different radio systems having unequal bands of operating frequencies represented by channels numbers. The device includes a radio transmitter; a radio ...
5552838 Apparatus for tuning offset signals by controlling a tuner based on a difference in frequency of signals tuned by that tuner  
A frequency counter obtains frequency data by measuring the frequency of an optionally offset broadcast signal tuned by a tuner having a VCO. A microprocessor is used to determine the frequency dif...
5552749 Method for automatically compensating for accuracy degradation of a reference oscillator  
A method for automatically compensating for accuracy degradation of the reference oscillator (170) is provided for a communication device (100). The communication device (100) is programmed with a ...
5542095 Frequency Reference Compensation  
The present invention provides a frequency tracking and compensation system and methods for minimizing the frequency offset between remote and local units of a communications system. The system of ...
5507021 Method to input alphanumerical information into a device having a central computer, a memory, and a keypad  
A method is proposed for entering alphanumeric information in an electronic apparatus, in which the entry is effected via an ordinary numerical keyboard. Based on the numbers entered, in which conn...
5483687 Operational transconductance amplifier track and hold system  
A voltage track and hold circuit operates to track a tuning voltage and holding the tuning voltage (404) as a reference voltage (408). In the track mode, the track and hold circuit includes a first...
5430890 Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency  
Digital tuning of a locally generated frequency supplied to a frequency converting mixer, a mobile radio receiver is provided with great economy of components by utilizing the sampling rate oscilla...
5345605 Individual selective-calling receiver with reduced number of switches  
An individual selective-calling receiver is disclosed which includes a switch, a first timer for generating an output signal in a case where the switch is put in an ON-state for a time longer than ...
5327582 Wideband wireless communications receiver  
A wideband transceiver using contiguous overlapping frequency range local oscillators (32, 34) for a high side or a low side local oscillator and an intermediate frequency approaching, within comme...
5263178 Procedure for arranging switch-type control in a radio telephone  
The radio unit of a modern radio telephone comprises a plurality of controlled two-position switches. Each controlled switch most often requires an individual control line from a processor. The gre...
5230094 Method and apparatus for intermediate frequency selection in a heterodyne receiver  
In a heterodyne receiver having more than one selectable receive frequency and having at least one intermediate frequency circuit (102) capable of operation on at least two intermediate frequencies...
5212833 Microcomputer controlled synthesizer-type radio receiver  
An electronic apparatus includes at least a receiver having a synthesizer section for selecting a receiving frequency and providing an information signal corresponding to the selected receiving fre...
5170497 Tuning method and apparatus  
A frequency tuning method and apparatus for a broadcast receiver adapted to receive standard and offset broadcast channel frequencies. Each standard channel frequency is stored in a memory as repre...
5101509 RF filter alignment using digital processor clock  
A variable frequency RF passband filter is calibrated to maximize the sensitivity of a radio receiver using reference frequencies applied based on the clock operation of a digital processor within ...
5014348 Self-programming scanning radio receiver  
Self-programming scanning receiver having superheterodyne circuitry, microprocessor controlled synthesized frequency tuning circuitry, frequency validation means, a learn mode to invoke the frequen...
4959872 Automatic frequency control apparatus for FM receivers  
An automatic frequency control apparatus for an FM receiver. The apparatus includes a local oscillator for generating a local oscillation signal which frequency is controlled in response to a recei...
4956711 Automatic balancing system for communications receiver apparatus  
The individual radio frequency filters are balanced successively by application of an auxiliary frequency at the antenna input. The auxiliary frequency is disposed between the frequency of the pict...
4932072 Mobile station equipment for a mobile radio telephone system  
A mobile station equipment for a mobile radio telephone system uses a voltage-controlled, temperature-compensated crystal oscillator (VC-TCXO) as a reference oscillator for local oscillators in fre...
4905305 Method and apparatus for controlling the frequency of operation and at least one further variable operating parameter of a radio communications device  
The operating frequency of a radio transceiver and at least one further variable operating parameter of the radio transceiver are controlled in accordance with pre-stored information. Transmit oper...
4903328 Automatic frequency sweeping method for controlling a frequency synthesizing type autotuner  
An automatic frequency sweeping method for controlling frequency synthesizing type autotuners for broadcasting receivers comprises a first intermediate frequency counting method in which the interm...
4901036 Frequency synthesizer with an interface controller and buffer memory  
A frequency synthesizer which has at least one programmably characterized phase lock loop circuit includes a buffer memory and an interface controller responsive to operational codes received from ...
4887311 Radio with options board  
A FM mobile radio is disclosed which is capable of future functional expansion due to a unique microprocessor hardware/software control system. The radio includes a control microprocessor which is ...
4868892 Tuning system with provisions for calculating the local oscillator frequency from an aft characteristic  
A television tuning system includes control apparatus for changing the frequency of a local oscillator signal during a search and a comparator arrangement for determining when an AFT signal travers...
4805230 Tuning method  
In a tuning apparatus of frequency synthesizer system comprising an input circuit means including a channel switch and a shift switch, a microcomputer and a phase-locked loop circuit including a pr...
4792989 Tuner circuits and voltage generators therefor  
In a tuner circuit, the relatively high voltage used to control a varactor diode of the circuit is derived using a cascade of resistors and transistors under the control of a reference voltage inpu...
4761825 TVRO earth station receiver for reducing interference and improving picture quality  
A method of reducing terrestrial interference is provided for a TVRO earth station receiver comprising a super-heterodyne circuit including a voltage-controlled oscillator (VCO), a mixer for combin...
4731874 Radio receiver having second receiver part for avoiding interference signals  
A radio receiver has a first radio receiving part which receives the signal of the desired radio broadcasting station, a first receiving field intensity detector which detects the receiving field i...
4727591 Microprocessor controlled tuning system  
A tuning system receives signals from a radio frequency source and supplies an intermediate frequency signal to a signal detector under the control of a microprocessor. The microprocessor reads a c...

Matches 1 - 50 out of 95 1 2 >