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8538361 TV tuner and the manufacturing method thereof  
A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a...
8521111 TV tuner and the manufacturing method thereof  
A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a...
8446200 Systems and methods for a continuous, linear, 360-degree analog phase shifter  
Embodiments of the invention may be directed to a continuous analog phase shifter for radio frequency (RF) signals, which can be integrated on a CMOS process or another compatible process where...
8306492 TV tuner and the manufacturing method thereof  
A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a...
8248157 Variable capacitance unit  
Implementations of differential variable capacitance systems are disclosed.
8213890 System and method for tuning-capacitor-array sharing  
A system and method for sharing a switched capacitor array (SCA) by two tuning circuits are disclosed. In a multiple-band radio receiver, there is a need to use multiple tuning circuits for...
8150348 TV tuner and the manufacturing method thereof  
A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a...
8140041 Tunable capacitive device with linearization technique employed therein  
One exemplary tunable capacitive device includes a first tunable capacitive element, a first coupling capacitive element, a first coupling resistive element, and a first specific capacitive...
8000668 Transmit/receive circuit with PIN diodes  
Structurally simple transmit/receive circuits for hearing devices are to be able to be deployed for higher frequencies as well. It is therefore proposed according to the invention that at least...
7983638 Tuner input filter with electronically adjustable response for adapting to antenna characteristic  
A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to...
7852177 Double-tuning circuit of television tuner  
In a double-tuning circuit including a primary tuning circuit having a first inductor and a first variable capacitive element connected in parallel and a secondary tuning circuit having a second...
7668519 Tuner input filter with electronically adjustable response for adapting to antenna characteristic  
A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to...
7620379 Radio frequency tuner  
A radio frequency tuner comprises one or more tracking filters ahead of at least one frequency changer. A controller has a filter alignment mode and a reception mode. Each filter has one or more...
7561865 System and method for determining a resonant frequency in a communications device  
A communications device including communications circuitry, tunable filter circuitry including a node configured to pass a signal between an antenna and the communication circuitry, and control...
7546101 Variable attenuation of broadband differential signals using PIN diodes  
Disclosed herein is a system for the variable attenuation of broadband differential signals. An exemplary system of variable attenuation of broadband differential signals includes attenuation...
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,...
7295251 Television tuner capable of improving image disturbance with receiving UHF band  
The present invention provides to provide a television tuner capable of improving image disturbance when receiving a UHF band television signal. The television tuner comprises a tuning circuit...
7289780 Band switchable type tuning circuit of television signal  
A band switchable type tuning circuit has first switch means interposed between a power supply Vcc and an anode of a switch diode, a first resistor whose one end is connected to a cathode of the...
7283796 Electronic tuning system  
An electronic tuning system includes an electronic tuner for adjusting the predetermined control voltage of a voltage controlled oscillator (VCO) to tune the local frequency signal to radio waves...
7155182 Varactor with extended tuning range  
The invention proposes a device for high-frequency and/or radio-frequency tuning comprising within one IC-package a first variable capacitor (C1) and at least one second capacitor (C2), each of...
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) for...
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...
6973288 Linearizer for a PIN diode attenuator  
Linearizer circuitry is disclosed for providing control signal outputs to operate a controllable attenuator throughout a relatively large dynamic range while maintaining a relatively consistent...
6970056 Filter assembly and communication apparatus  
A filter assembly includes a transmission filter, a reception filter, a change-over switch, and phase circuits. The transmission filter has first and second ends electrically connected to a first...
6957053 Method for selection of a receiver tuning frequency  
Method for tuning the reception of radio broadcast signals to an FM RDS transmitter using program related data and transmitter related data and receiver executing the method, providing a band...
6950152 Television tuner which has leveled a gain deviation in the same band  
A gain deviation is leveled in the same band by using a varactor diode having the same characteristics as that used in an input tuning circuit for coupling the input tuning circuit and a high...
6906596 Oscillation circuit and a communication semiconductor integrated circuit  
A voltage controlled LC resonance oscillation circuit has a plurality of capacitive elements connected to an output node. These capacitive elements are applied with voltages at opposing terminals...
6904271 High-frequency-signal switching circuit suppressing high-frequency-signal distortion  
A high-frequency-signal switching circuit includes a first high-frequency-signal path which includes first and second diodes connected in series with a high-frequency amplifier stage therebetween,...
6711390 Program related data in an FM RDS receiver  
Method for processing transmitter and program related data in an FM RDS receiver and receiver executing the method, providing a band scanning search for detecting FM RDS transmitters exceeding a...
6583826 Intermediate frequency circuit in television tuner with large attenuation of audio if signal in adjacent channel  
The present invention resides in the provision of an intermediate frequency circuit in a television tuner capable of enlarging the attenuation of a audio IF carrier in an adjacent channel without...
6466114 Resonator with variable resonance frequency  
The invention relates to a resonator (200,300) with variable resonance frequency, intended for connection to an amplifier, thus forming an oscillator, said resonator comprising a resonator circuit...
6226503 Double-tuned circuit  
Between one end of a high-band tuning coil in a primary tuning circuit and one end of a high-band tuning coil in a secondary tuning circuit, a first switch diode and a second switch diode...
6160572 Tuner for cable modem  
Input CATV signals are received by a PIN diode where the signals are high frequency signals of a plurality of frequency bands including UHF band, VHFHIGH band and VHFLOW band, the respective...
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...
5752179 Selective RF circuit with varactor tuned and switched bandpass filters  
A selective RF circuit for a double conversion tuner includes three sections: low and mid band double tuned bandpass sections and a high band double tuned bandpass section. Each section includes...
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...
5715528 Converting capacitance to inductance in a floating resonant  
An improved tuner for a varactor-tuned local oscillator in a radio receiver includes a winding of a pair of magnetically coupled inductors, preferably constructed in the form of a transformer....
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...
5548829 PLL circuit having a low-pass passive filter coupled to a varactor diode  
A low-pass passive filter is inserted in the phase locked loop of a voltage-controlled oscillating circuit having a varactor diode. The filter has a first resistor, a capacitor and a second...
5524288 Tuning of a radio receiver  
The present invention relates to a method of tuning a radio receiver to a desired frequency. The frequency of each tuning circuit in the radio receiver is controlled by controlling the capacitance...
5438690 Tuner circuit substrate having a jack attachment plate electrically connected with an earth pattern  
In a tuner for converting antenna input signal into audio signals, tuner circuit components are mounted on a tuner circuit substrate. Of the tuner circuit components, FM wave front end circuit...
5428828 Television receiver tuning circuit  
A signal selecting circuit including a first, second and third inductors coupled in series in the order named, a fourth inductor coupled between an output terminal of the third inductor and a...
5285179 Double tuned circuit with balanced output and image trap  
Conversion of an RF signal amplifier from an unbalanced signal configuration to a balanced signal configuration is provided while including an image trap for both sides of the balanced circuit....
5179726 Automatic tuning method and apparatus of double conversion tuner  
This invention relates to an automatic tuning method and apparatus in which tuning voltage corresponding to picture/sound carrier wave difference of channel selected by double conversion tuner is...
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...
4771332 Tuning apparatus for the VHF band of a television receiver  
A channel selection circuit selects signals of a desired frequency from television signals. A channel interpretation circuit determines whether or not the signals thus selected are low-band or...
4710973 Varactor diode tuner with band switched coils and lines  
A tuner in which a band switching signal corresponding to a channel selected from a plurality of UHF and VHF bands is generated to enable the formation of a suitable resonant circuit for receiving...
4555808 Tuner apparatus  
A television tuner comprises a voltage controlled variable capacitance diode provided in common to the UHF band, the VHF high band and the VHF low band. A tuning voltage provided from a channel...
4424594 Extended range tunable resonant circuit for a VHF television receiver tuning system  
An extended range tunable resonant circuit for use in a VHF television receiver tuning system comprises a bandswitchable inductive network connected to a low series resistance gallium arsenide...
4365348 Tuning voltage generating apparatus of voltage synthesizer type  
A tuning voltage generating apparatus of a voltage synthesizer type comprises a voltage converter which converts into a reference voltage a voltage level of an input pulse signal having a pulse...

Matches 1 - 50 out of 86 1 2 >