Matches 1 - 43 out of 43
Match Document Document Title
7505738 Broadband receiver  
A broadband receiver exhibiting reduced interference to a frequency counter caused by a local oscillator. The broadband receiver is arranged for detecting a radio signal of strong reception...
7426373 Electrically tuned resonance circuit using piezo and magnetostrictive materials  
An impedance tuning system, especially for a cellular telephone system. The system can be used to match the impedance of an antenna element with that of an output stage of a transmitter driving the...
7386065 Voltage controlled oscillator (VCO) suitable for use in frequency shift keying (FSK) system  
A voltage controlled oscillator (VCO), suitable for use in a frequency shift keying (FSK) system. The VCO device comprises a switching varactor unit, having a first terminal and a second terminal,...
7359672 Apparatus and method for frequency conversion  
An apparatus for frequency up conversion and down conversion using frequency multiplier circuits. The frequency multiplier circuits receive a lower frequency signal and are operated in a forward...
7269399 Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section  
A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The...
7248838 Wireless communication system within a system on a chip  
A communication system for transmitting data between cores embedded in an integrated circuit on a silicon chip. Communication system includes transmitter circuitry for wirelessly transmitting data...
7103320 Wireless communication system within a system on a chip  
A communication system ( 8 ) for transmitting data between cores ( 10 ) embedded in an integrated circuit on a silicon chip ( 12 ). Communication system ( 8 ) includes transmitter circuitry ( 24 )...
7095989 Frequency translating devices and frequency translating measurement systems with DC bias added to a mixer diode  
A frequency translating device (FTD) includes at least one mixer diode connected to down-convert a radio frequency (RF) to an intermediate frequency (IF) and to up-convert an IF to an RF and a...
6968168 Variable oscillator  
A variable frequency oscillator comprising: an oscillatory circuit for generating a periodic output dependent on the capacitance between a first node and a second node of the circuit, and having a...
6907234 System and method for automatically tuning an antenna  
An apparatus and method is related to a wireless system with an antenna that is automatically tuned to a desired frequency. The antenna is coupled to an adjustable tuning circuit to form a tuned...
6876401 FM-broadcast-receivable television tuner for preventing adjacent-channel interference  
A trap circuit system includes a first trap portion and a second trap portion. In the first trap portion, a first capacitor is provided in parallel to a first switch diode. A control voltage is...
6490441 Tuning circuit device with built-in band pass integrated on semiconductor substrate together with PLL circuit  
An analog tuning circuit, a phase locked loop and a controller form a semiconductor integrated tuning device, and the analog tuning circuit has a variable band pass filter between a mixer and an...
6438183 Digital audio broadcast receiver and tuning method thereof  
A digital audio broadcast receiver is tuned by performing a sliding correlation on data demodulated from a phase reference symbol, correlating the demodulated data with known data at negative...
6243570 Radio receiver capable of temperature adjustment to tuning frequency of RF tuning circuit  
A variation in tuning frequency of an RF tuning circuit due to temperature changes in a radio receiver is prevented. A tuning frequency of an RF tuning circuit results from a coil (L) and a varicap...
6081700 Radio having a self-tuning antenna and method thereof  
A radio (100) includes a receiver circuitry (106) for use in conjunction with a tunable antenna (101). The radio includes a controller (122) which may be a digital signal processor. The controller...
6064866 Switchable bandpass filter for a multiband tuner  
To achieve a high passband attenuation, a switchable bandpass filter for a multiband tuner, includes at least a capacitance diode for frequency-tuning of at least a resonant circuit of the bandpass...
6021322 AM radio receiver  
In an AM radio receiver, a radio-frequency tuning circuit comprises a tuning coil, and variable capacitance diode elements connected to the tuning coil; a local oscillator circuit comprises an...
5978663 Antenna tuning circuit  
An antenna tuning circuit of a tuner with a band switching device, which can eliminate an image disturbance and a disturbance due to a UHF band frequency at reception of a high band and further...
5715531 Synchronous tracking filter circuit for a broadcast satellite tuner  
A synchronous tracking filter circuit for use in a broadcast satellite tuner that comprises four varactors and a strip-shaped inductor plate or pcb-printed strip line which produces a resonant...
5678212 Electronic tuning circuit for an AM receiver  
An electronic tuning circuit for an AM radio receiver in which a signal of a specific frequency is selected from the input signal from an antenna is provided, this tuning circuit having a tuning...
5678211 Television tuning apparatus  
The invention concerns an arrangement including a microprocessor controller, PROM memory, and a digital to analog converter (DAC) arrangement for generating a plurality of control voltages for...
5548821 Adaptive system for self-tuning and selecting a carrier frequency in a radio frequency communication system  
A system for adaptive self-tuning of a receiver in a radio communication system. Prior to transmission of each data packet from a transmitter to a receiver, the transmitter generates a sequence of...
5438699 Adaptive system for self-tuning a receiver in an RF communication system  
A system for adaptive self-tuning of a receiver in a radio communication system. Prior to transmission of each data package from a transmitter to a receiver, the transmitter generates a sequence of...
5428829 Method and apparatus for tuning and aligning an FM receiver  
A method for tuning and aligning an electronically tuned FM broadcast receiver is described. The system described compensates for the mismatch of component values between the antenna and RF...
5404587 AFC circuit and IC of the same adapted for lower heterodyne conversion and upper heterodyne conversion  
An automatic frequency control circuit comprises a variable reactance element connected to a resonance circuit of a local oscillation circuit of an FM receiver, an inverting amplifier to which a...
5301358 Automatic antenna tuning method and apparatus  
A wristwatch paging receiver is provided with an antenna matching network that automatically retunes the network at the beginning of a listening interval. During the retuning operation, a control...
5263183 Radio antenna tuning circuit  
The present invention provides an antenna or preselector tuning method and circuit that tunes an antenna or preselector in a very short period of time. The circuit of the present invention does not...
4984296 Tuned radio apparatus  
A tuned radio apparatus includes a tuned radio receiver and a tuned antenna apparatus both of which are tuned to the same frequency. The antenna apparatus may include a varactor similar to a...
4921465 Varactor tuned UHF RF signal input circuit  
An RF signal input circuit for a UHF tuner of a television receiver comprises a series-tuned circuit including a varactor diode and an inductance element connected in series, in the order named,...
4837852 Electronic tuning circuit for AM receiver which is easy to effect tracking adjustment  
An electronic tuning circuit for AM receiver is disclosed which is so designed that tracking errors are minimized by increasing the accuracy of constants for tuning coils, oscillation coils and...
4742569 Tuning circuit for AM receiver  
In a tuning circuit for AM receiver, tuning coils, oscillation coils and capacitance elements of an antenna tuning circuit, a radio frequency amplifier circuit, and a local oscillator circuit are...
4381566 Electronic tuning antenna system  
At the feed side of each antenna element having transmitting conductor paths formed in continuous meandering shapes and having distributed constant impedances are electrically connected a variable...
4339827 Automatic tuning circuit arrangement with switched impedances  
Tuning circuitry for a VHF television (TV) antenna tunes such antenna for signals corresponding to the TV channel selected and couples those signals to the tuning system of a television receiver....
4186350 Antenna tuning circuit  
An antenna tuning circuit of the type having a first variable capacitance diode connected in parallel with a coil to form a resonance circuit and a second variable capacitance diode through which...
3876965 UHF-VHF combination tuner  
A UHF-VHF combination tuner is provided with a rotatable turret having a plurality of tuning segments for receiving VHF and UHF signals, respectively, which are sequentially arranged around the...
3646449 INPUT STAGE FOR A RECEIVER, PARTICULARLY FOR THE MEDIUM WAVE  
A receiver input stage for the reception of signals in a broad frequency range comprising an input resonant circuit and an output resonant circuit that is identical to the antenna-input circuit....
3579113 ANTENNA COUPLING CIRCUIT  
A high impedance capacitive antenna is coupled in series with a low impedance resistive load in the form of the input circuit of an RF transistor amplifier through a series-tuned circuit including...
3571719 OVERLOAD COMPENSATION CIRCUIT FOR ANTENNA TUNING SYSTEM  
In an antenna tuning system using a voltage variable capacitor diode in the tank circuit for tuning, the antenna is provided with an overload compensation circuit for the capacitor diode in the...
3571715 OVERLOAD COMPENSATION FOR ANTENNA-TUNING SYSTEM  
A tank circuit for tuning the antenna of a radio receiver includes a voltage variable diode capacitor as the variable tuning element therein. In order to prevent strong RF input signals from...
3571716 ELECTRONICALLY TUNED ANTENNA SYSTEM  
A tank circuit for the aerial of a radio receiver includes a transformer located in a housing positioned at the bottom of the aerial with the primary winding electrically connected to the aerial. A...
3519939 AUTOMATIC TUNING RECEIVER WITH DETUNING MEANS  
3458820 RECEIVING APPARATUS  
3570005 Title is not available  
Matches 1 - 43 out of 43