Matches 1 - 29 out of 29
Match Document Document Title
7447529 Modular communications devices  
A set of parts for assembly into a reconfigurable communications device has at least an earpiece ( 16 ) a microphone ( 20 ) and a press-to-talk switch ( 24 ). These parts can be assembled together...
7414676 Integrated programmable tuner  
An integrated tuner is programmable to optimize its components for either analog signal reception or digital signal reception. Power to the components is increased for analog operation and...
7403756 Highly-integrated MEMS-based miniaturized transceiver  
The present invention is directed to a highly-integrated MEMS-based miniaturized transceiver. The transceiver utilizes a low band front-end to direct sample low band signals and a high band...
7366487 Receiving band switching circuit with reduced signal loss upon switching receiving band  
A receiving band switching circuit includes a first high frequency circuit through which a first frequency band signal passes, a second high frequency circuit through which a second frequency band...
7319849 Radio-frequency tuner with differential converter  
A system for tuning a radio-frequency signal includes a first input path, a second input path, a common reference generator, a selector, a mixer, and a filter. The first input path and the second...
7146143 Communication semiconductor integrated circuit device and wireless communication system  
The invention provides a communication semiconductor integrated circuit device (RF IC) capable of pulling in the frequency of a PLL circuit to a desired set frequency at high speed even in the case...
7113744 Adaptive radio transceiver with a power amplifier  
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
7088984 Electronic tuner  
An electronic tuner of the present invention is arranged such that between an input part of the amplifying circuit and the ground serially connected are a coil and a diode, and a capacitor is...
7079815 Monolithic microwave integrated circuit transceiver  
A transceiver having a transmit/receive switch. The transmit/receive switch includes: a common port adapted for coupling to an antenna element; a transmit port; a receive port and a matched port....
7072685 Digital/analog broadcast receiver  
When a digital broadcasting channel and an analog broadcasting channel, over which the same program is currently being transmitted, are provided by a broadcasting station, upon each depression of a...
7050772 Circuit arrangement for switching a mobile radio transmitter between two modulation modes  
A circuit is provided for regulating operation of a transmitter of a mobile communication terminal, which runs in the EDGE and GMSK modulation modes. The inventive circuit includes a power...
6993356 Frequency generating system for a mobile radio dual-band transceiver  
In a frequency generating system, a triple/single local-oscillator concept for receiving and transmitting in the lower frequency band, transmitting in the upper frequency band, and receiving in the...
6937846 Pin diode circuit arrangement  
A PIN diode switching system is provided, particularly for the transmission stage of a mobile radio telephone, in which, when the PIN diode switching system is in a reverse-bias state, a PIN diode...
6864924 Television tuner input circuit having satisfactory selection properties at high band reception  
The present invention provides a television tuner input circuit having satisfactory selection properties free from influence by half of signal frequencies to be received. The television tuner input...
6864925 Television tuner having less distortion  
A television tuner includes an input tuning circuit and an interstage tuning circuit. Each of the tuning circuits comprises a band-switching tuning circuit having a tuning inductor and a switching...
6799022 Input circuit for FM/AM radio receiver  
An input circuit for an AM/FM radio receiver having an FM intermediate frequency rejection circuit and an AM image frequency rejection circuit, an FM input circuit for receiving frequency-modulated...
6704555 Apparatus and method for calibrating local oscillation frequency in wireless communications  
According to a disclosed embodiment, a receiver comprising a digital rotator in combination with a frequency error discriminator in a digital automatic frequency control loop is used to arrive at...
6317168 Digital TV receiver for performing channel selection using stored channel information and method performing the same  
Disclosed is a digital TV receiver performing a channel selection using stored channel information and a method for selecting a channel. With respect to a broadcasting signal which is not being...
6246866 Dual band receiver  
A receiver (100) provides dual band features by providing two signal paths (106, 108) off an antenna (102), one for UHF operation (106) and one for VHF operation (108). The two signals paths (106,...
5268712 Apparatus and method for search tuning of satellite television sound carriers  
Apparatus and method for frequency-tuning the frequency-modulated sound carriers of multichannel sound transmission signals in a satellite television receiver. By utilizing digital signal...
5243431 Audio bandpass filter adaptive to differing television standards  
A filter equipment comprises a plurality of filters, which are connected in cascade or in parallel. Characteristics of each filter are controlled according to an applied current. Desired...
4905306 Filter switching arrangement for a tuner  
In a tunable filter including first and second inductors, a varactor diode, and a bandswitching diode connected intermediate the inductors to select the inductor configuration for first and second...
4802238 Radio receiver  
In a radio receiver which can be switched between at least two waveranges, the coil winding (33) of the oscillator circuit (31) has a further coil winding (36) inductively coupled to it with which...
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...
4326295 Television tuner circuit  
A television tuner comprises a VHF tuner section and a UHF tuner section and is configured in the two tuned modes of VHF high band and VHF low band between which the input tuning circuit of the VHF...
4115737 Multi-band tuner  
A tuner for receiving signals broadcast on two spaced bands, each divided into several channels, has two fixed bandpass filters, one to pass all of the channels in the lower band between the lowest...
3596183 MULTIBAND TUNING CONTROL SYSTEM WIGH PROGRAMMABLE ELECTRONIC SWITCHING  
Tuning of a television receiver capable of receiving signals in the UHF and VHF bands of frequencies is controlled by an electronic ring counter circuit, the outputs of which are supplied through...
3376508 U.h.f. and v.h.f. tuner for receivers  
2812433 Plural band frequency converter with intermediate frequency trapping means  
Matches 1 - 29 out of 29