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7606542 |
Simplified high frequency tuner and tuning method
A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator...
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7587224 |
Reconfigurable topology for receiver front ends
The method and apparatus of the present invention provide for a configurable radio front end topology that allows selectable operation in a single balanced mode and in a double balanced mode of...
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7558548 |
Method and apparatus for receiving and/or down converting high frequency signals in multi mode/ multi band applications, using mixer and sampler
A method and apparatus to receive and down convert high frequency radio signals to low frequency or base band frequency is disclosed. A mixer used with a sampler produces a multi mode/multi band...
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7548726 |
Adaptive radio transceiver with a bandpass filter
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...
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7535976 |
Apparatus and method for integration of tuner functions in a digital receiver
A receiver to process a RF input signal having a plurality of channels includes a direct down conversion circuit, a demodulation circuit, and a local oscillator circuit. The direct down conversion...
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7519100 |
Method and device for transmission/reception with frequency hopping
A method and device for transmitting data in the form of a series of blocks in which each block of data is subjected to a frequency conversion in order to be transmitted at a carrier frequency. The...
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7512395 |
Receiver and integrated AM-FM/IQ demodulators for gigabit-rate data detection
This disclosure addresses providing gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for...
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7509104 |
Method and apparatus for tuning radio frequency
A double conversion RF tuner includes an up-conversion unit and a down-conversion unit. The up-conversion unit up converts a received radio frequency (RF) signal corresponding to a first frequency...
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7463868 |
Adaptive radio transceiver with offset PLL with subsampling mixers
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...
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7447493 |
Tuner suitable for integration and method for tuning a radio frequency signal
A tuner ( 200 ) includes a direct digital frequency synthesizer ( 206 ) and a mixer ( 220 ). The direct digital frequency synthesizer ( 206 ) has an output terminal for providing a digital local...
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7437133 |
Radio frequency tuner front end and tuner
A front end for a radio frequency tuner, for example for connection to a cable distribution network, including an input connected to a signal path comprising an LNA connected via an AGC stage to a...
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7409199 |
Direct conversion receiver with DC offset compensation
A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of...
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7394874 |
Up/down conversion circuitry for radio transceiver
A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for...
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7389087 |
Adaptive radio transceiver with filtering
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...
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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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7321751 |
Method and apparatus for improving dynamic range in a communication system
An apparatus for improving dynamic range includes a frequency down-conversion module that receives an input signal and a bias circuit. The bias circuit includes a first resistor and a second...
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7292835 |
Wireless and wired cable modem applications of universal frequency translation technology
Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency...
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7274919 |
Radiofrequency transmitter and/or receiver
The invention provides a simple solution for a broadband transmitter/receiver for which the working bandwidth is split into at least two non-contiguous sub-bands. The invention uses a filtering...
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7259800 |
Television signal receiver with a universal output for surface-acoustic wave filters of different types
The invention relates to a television signal receiver comprising a radio-frequency tuner ( 1 ) and at least one subsequent surface-acoustic wave filter ( 2 ), in which the radio-frequency tuner ( 1...
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7251466 |
Television receiver including an integrated band selection filter
A tuner circuit includes a band selection filter coupled to receive an input RF signal and provide a band selected output signal where the band selection filter includes a bank of band pass...
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7239854 |
Frequency-doubling circuit arrangement, and mobile radio having that circuit arrangement
One or more aspects of the present invention are directed to a frequency-doubling circuit arrangement that doubles the frequency of a signal applied to its input, and presents that doubled...
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7184724 |
System and method for frequency translation using an image reject mixer
Frequency translation, such as frequency up conversion of a video baseband or intermediate frequency to a desired frequency division broadcast channel, is provided utilizing a single sideband or...
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7136622 |
Adaptive radio transceiver with noise suppression
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...
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7130579 |
Adaptive radio transceiver with a wide tuning range VCO
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...
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7095454 |
Broadband single conversion tuner integrated circuits
A tunable receiver is disclosed including a plurality of select filters to perform an initial band selection, a variable-gain low noise amplifier (LNA) whose gain is controlled to prevent its...
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7092687 |
Five-port topology for direct down-conversion
An apparatus for a direct down-conversion of modulated RF signals, the device including: a first power detector connected between an input port for the modulated RF signal and ground, which outputs...
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7039375 |
Up/down converter
The invention provides an up/down converter with low phase noise. Signals from a first local oscillator are fed through a power splitter to first and second mixers. Signals from a second local...
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6975838 |
Adaptive radio transceiver with noise suppression
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...
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6925289 |
Broadcast receiver and channel scanning method
A channel scanning method in a multi-channel digital broadcast is provided for enabling a user to identify the broadcast contents of a channel being currently received with accuracy during the...
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6901249 |
Complementary bipolar harmonic mixer
A 3-terminal harmonic mixer which solves the conversion gain, port impedance and isolation problems associated with known harmonic mixers. In particular, the 3-terminal harmonic mixer in accordance...
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6895190 |
Switchable bandwidth lowpass filter
A novel transceiver is provided which allow for either a transmitter or receiver to be dynamically switched between two different frequency bands by use of a novel switchable lowpass filter.
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6823169 |
Low cost interoperable satellite digital audio radio service (SDARS) receiver architecture
A system and method for simultaneously receiving first and second ensembles. The first ensemble includes a first signal from a first satellite, a first signal from a second satellite and a first...
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6804261 |
Multi-band receiver having multi-slot capability
A dual-band receiver for a wireless communication device having multi-slot capability. A first oscillator generates a relatively high frequency traffic LO signal. A second oscillator generates a...
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6788922 |
Radio FM receiver having a frequency 2-divider and a frequency 3-divider for alternatively dividing a VCO signal for down-converting a received radio signal
A radio FM receiver is provided with a voltage-controlled oscillator which can be connected via a frequency 2-divider to a quadrature combination circuit for transforming down the frequencies of...
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6754281 |
Programmable digital demodulator for OFDM modulations
The invention relates to a digital demodulator whose architecture is adapted to multicarrier modulations (radio wave transmissions), but which remains suitable for use for monocarrier modulations...
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6591093 |
Circuit and method for frequency translation
A mixer circuit ( 21 ) includes first ( 31 ) and second ( 32 ) transconductance amplifiers, a switching circuit ( 34 ), and an oscillator processing stage ( 36 ). The transconductance amplifiers (...
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6564045 |
Broadband frequency multiplier
An LO generation circuit generates an LO signal by doubling and quadrupling the frequency of a VCO signal. The frequency doubling and quadrupling provides high VCO-RF isolation as well as...
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6535722 |
Television tuner employing micro-electro-mechanically-switched tuning matrix
A tuning circuit, as for a television receiver or video recorder, employs switchable tuning circuits including micro-electronic electro-mechanical switches for selecting the ones of an array of...
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6359940 |
Method and apparatus for downconverting signals transmitted using a plurality of modulation formats to a common intermediate frequency range
A receiver that downconverts input signals modulated using first, second, third and fourth modulation formats to a common intermediate frequency range. The first and second modulation formats are...
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6356599 |
AFC device and method of controlling reception frequency in a dual-mode terminal
An AFC (Automatic Frequency Control) device and a method of controlling reception frequency in a dual-mode terminal. When a dual-mode terminal uses one or two AFC devices, the time required for...
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6356748 |
Spectrum control for direct conversion radio frequency reception
A method and apparatus for passband communication using direct conversion avoids 1/f and DC-offset noises by shaping the spectrum of the signal so that it has little energy near zero frequency....
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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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6236847 |
Receiver and filter arrangement comprising polyphase filters
In a receiver the input signal is converted by a mixer into two quadrature IF signals. The quadrature IF signals are amplified by an amplifier and filtered by a filter. A polyphase filter...
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6052569 |
Radio receiver having a first tuner circuit for receiving signals in a first and a second frequency range, and a second tuner circuit for receiving signals in the first and a third frequency range
A radio receiver includes a first tuner circuit (1) for receiving radio signals of a first and a second frequency range, and a second tuner circuit (2) for receiving radio signals of a third...
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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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6016170 |
Double conversion television tuner
A double conversion television tuner capable of receiving analog and digital telecasts and having a reduced number of frequency conversion stages with fewer oscillators to minimize beat...
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5991597 |
Converter for a satellite signal receiving antenna
A converter for a satellite signal receiving antenna, comprising a input terminal for inputting a signal in a frequency band other than the output frequency band of the IF signal converted from the...
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5983088 |
Wide frequency spectrum television tuner with single local oscillator
A tuner includes a conversion (or heterodyning) stage, including a local oscillator and a mixer, for converting an RF signal corresponding to a selected channel to an IF signal. The local...
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5966646 |
Dual-band radio receiver
A simplified structure is disclosed for a dual-band, double-conversion superheterodyne receiver. All mixer-injection signals are generated by combining the outputs of two phase-locked frequency...
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