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7392026 |
Multi-band mixer and quadrature signal generator for a multi-mode radio receiver
A multi-band high gain mixer and quadrature signal generator allows a receiver system to receive signals at multiple frequency bands without requiring significant hardware duplication. A single...
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7383024 |
Multi-band handset architecture
Architectures for a class of multi-band handsets are described. These architectures separate linearity requirements from isolation requirements and reduce the number of throws on switches requiring...
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7343140 |
Tuner
A tuner is provided for selecting, independently of each other, a plurality of radio frequency channels for simultaneous reception. The tuner comprises a plurality of up converters whose outputs...
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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...
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7315730 |
Architecture for a receiver front end having dual output low noise amplifier driving separate pre-selectors coupled to a transformer for single ended output
An architecture for a receiver front end utilizes a dual output low noise amplifier ( 102 ) driving separate, fixed preselectors ( 104, 106 ) coupled to a transformer ( 108 ) to generate a single...
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7305250 |
Apparatus and method for simultaneously performing a TV reception function and a calling function in a mobile phone
A method and apparatus is provided to simultaneously perform a TV reception function and a calling function in a multimode mobile phone supporting two or more communication services. The apparatus...
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7286794 |
Method and system for joint broadcast receiving and cellular communication at mobile terminal or device without service control
Methods and systems for communicating information via a plurality of different networks are disclosed herein. Aspects of the method may comprise receiving broadcast information in a mobile terminal...
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7224948 |
Transmitter and radio communication terminal using the same
There are provided a transmitter and a wireless communication terminal apparatus using the same for solving a problem of undesired spurs due to harmonics of an output signal of a frequency...
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7218900 |
Radio transmitter and receiver
A broadband signal radio communication device which is capable of transmitting audio signals in a frequency band wider than a normal transmission band from 0 to 4 kHz in a radio system such as...
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7181184 |
Band edge amplitude reduction system and method
A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of...
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7164894 |
Receiver capable of switching between digital and analog broadcasting signals
A receiver includes an FFT analysis result/group delay characteristic determining unit for determining whether or not a group of carrier signals of a digital broadcasting signal satisfies...
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7158764 |
System and method for sending high fidelity sound between wireless units
A system and method for sending high fidelity sound between wireless units include the capability to receive audible sounds at a wireless unit and generate signals that represent the audible...
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7069510 |
In-vehicle audio browser system having a common usability model
An in-vehicle audio browser includes a first set of buttons that are configured to select a preset item. A second set of buttons move forward and backward through a list of items in the audio...
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7006805 |
Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver...
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6996384 |
Receiver and radio communication terminal using the same
Disclosed is a small-size receiver that exhibits high sensitivity when used with a plurality of frequencies or a plurality of radio communication systems. To provide a small-size, high-sensitivity,...
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6920316 |
High performance integrated circuit regulator with substrate transient suppression
A regulation circuit, incorporated in a single integrated circuit with a first circuit load, which as an input coupled to a power supply which produces a source voltage, and a first output coupled...
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6864926 |
Channel tuning apparatus
A channel tuning apparatus which improves operability by eliminating a need for a user to select a CATV mode and allows reliable channel tuning without misjudging the presence or absence of signals...
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6856797 |
Programmable radio receiver bandpass filter for cordless/wireless systems
A programmable band-pass filter in a radio-frequency receiver. The band-pass filter has a bandwidth substantially covering a channel bandwidth. Once the appropriate channel in use is determined,...
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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...
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6795714 |
Multiband antenna switcher
A multiband antenna switch is disclosed in which a matching pad ( 3 ) effects an open-circuit operation of the receiving branch at a circuit node (A) with respect to at least one higher-frequency...
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6775528 |
Control method for a phase-locked loop
The information delivered on the output of a detector linearly varies with the detection error only if this error lies in a certain range. To recover larger errors, oscillators are used which cover...
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6760079 |
TV tuner unit having a resonance network
A TV tuner unit uses a frequency-selective element before or after the resonance stage of either a UHF or VHF tuner for separation of UHF signals from VHF signals. Thus, performance is preserved...
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6745046 |
Integrated antenna coupler element
Integrated antenna coupler element, in particular for a multiband terminal of a mobile radio system, with an operating voltage connection, an antenna input/output, a transmit signal input, a...
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6738604 |
Programmable IF bandwidth using fixed bandwidth filters
A programmable IF bandwidth is achieved in either a transmitter or receiver using fixed bandwidth filters. A minimum of two IF frequencies are used. A fixed bandwidth filter that is equal to or...
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6734804 |
Automatic channel memory and selection method for a television set
An automatic channel memory and selection method for a TV set for automatically memorizing each channel having a broadcast signal with a single input of an automatic channel set-up key regardless...
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6731349 |
Tuner with at least a first and a second frequency band
The invention relates to a tuner with at least a first and a second frequency band and with means for effecting a switch-over between the frequency bands, which tuner comprises a signal input...
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6631255 |
Multi-carrier receiver for a wireless telecommunication system
A receiver ( 10 ) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received...
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6556630 |
Dual band telemetry system
A dual band telemetry system useful for monitoring patients in a care unit of a health care facility. The system includes an antenna system with a first antenna tuned to receive a signal in a first...
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6538704 |
NTSC tuner to improve ATSC channel acquisition and reception
Reduction in the time required for an Advanced Television Standards Committee (ATSC) digital television tuner to equalize, converge, and acquire a digital television signal suitable for viewing,...
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6487391 |
Method and apparatus for selectively receiving a satellite broadcast signal or a cable television signal
The present invention provides an improved receiver capable of receiving either a satellite broadcast signal or a cable TV signal associated with a TV. The inventive receiver comprises a first BPF...
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6484013 |
Dual-band transceiver and control method therefor
A dual-band transceiver operable in two different bands is disclosed. A local oscillator generates a fundamental frequency and a second harmonic frequency. A receiving circuit receives a...
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6466768 |
Multi-band filter system for wireless communication receiver
A filter system comprising three or more filters, each having different passbands, and an impedance adjusting network coupled between a filter system ports and each of the ports of at least two of...
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6456832 |
Antenna circuit
An antenna circuit which is improved the deterioration of amplitude characteristic in a strong electric field, an antenna circuit for AM broadcasting which can surely inhibit and damp FM-band...
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6393264 |
Radio terminal apparatus
A portable radio terminal apparatus for transmitting and receiving signals in different frequency ranges which has an apparatus for switching the radio terminal apparatus over into a respective...
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6307600 |
Tuning with diode detector
A tuner, for example, for a television receiver, includes a UHF and a VHF section and a mixer oscillator stage. It is known that the VHF frequency band has to be split in at least two parts to...
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6259902 |
Dual channel superheterodyne receiver
A dual channel receiver (100) includes a front end bandpass filter (120) that has a front end bandwidth, a first mixer (130), a second mixer (135), and two essentially identical receiver back ends...
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6252633 |
Television signal receiver
To simplify the circuitry in a television signal receiver having a radio-frequency tuner (1) and at least two subsequent surface-acoustic wave filters (2, 3), in which the radio-frequency tuner (1)...
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6239675 |
Tuning circuit having switchable capacitor controlled by a selection circuit
An electronic system 8 is disclosed herein. The system includes circuitry 10 for processing a signal and a plurality of antennas 12a-12b. A plurality of switches 22a-22b are also included. Each of...
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6201952 |
Radio communication apparatus
A first local signal required for a downconverter of a reception system and an upconverter of a transmission system in a first band is generated by a synthesizer for generating a variable high...
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6175746 |
Multiband mobile unit communication apparatus
A multiband mobile unit communication apparatus is disclosed which comprises: an antenna for receiving L FRQ bands of M radio wave SIGs modulated by N modulating methods, M>L, M>N, N≥L; a...
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6163222 |
Buffer amplifier with frequency selective mechanism
A buffer amplifier to be connected to an oscillator for outputting an oscillation signal, comprising an amplifier circuit for amplifying the level of the oscillation signal and frequency selective...
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6151488 |
Multi-tuner receiver for concurrent reception of mutually different signals
In a receiver, two tuners (TUN1,TUN2) provide concurrent reception of mutually different signals. The two tuners are merged into one module (MOD). This may give rise to mutual interference....
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6134452 |
Multiple band mixer with common local oscillator
A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The...
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6125269 |
TV FM receiver for multimedia applications
A receiver for receiving both first-type reception signals, for example TV signals, and second-type reception signals, for example, FM-radio signals. The receiver may be used in multimedia...
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6094564 |
Mobile communication apparatus operable in different formats and pairing I-F band pass filter type with I-F amplifier characteristics
A radio communication apparatus is designed for a plurality of different radio communication formats, one of which can be selected. The radio communication apparatus includes a fixed-gain IF...
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6085075 |
Communication system, a communication device and a frequency synthesizer
A radio device has an antenna for receiving a radio frequency signal, and a radio frequency mixer for down-converting the received radio frequency signal to an intermediate frequency signal. The...
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6075996 |
Intermediate frequency selecting device for use in dual band cellular telephone and method thereof
A dual band cellular telephone includes an antenna, a power amplifier, RF transmission and reception chains, first and second local oscillators, and IF transmission and reception chains. In order...
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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...
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6029052 |
Multiple-mode direct conversion receiver
A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than...
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6014547 |
System for enhancing the performance of a CATV settop terminal
A system for use with a CATV settop terminal measures the input RF carrier signal power level at several frequencies within the CATV RF input bandwidth upon system power-up. The system utilizes...
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