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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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7379727 |
RF front-end receiver
An RF front-end receiver comprises a low noise amplifier and a local oscillator driver, which are connected to respective input ports of a mixer which comprises a first and second transistor with...
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7376403 |
Terahertz radiation mixer
A terahertz radiation mixer comprises a heterodyned field-effect transistor (FET) having a high electron mobility heterostructure that provides a gatable two-dimensional electron gas in the channel...
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7369837 |
Frequency-mixing method and frequency-mixing device using the same
A frequency-mixing method includes a step of generating a first quadrature signal having a predetermined frequency, a second quadrature signal having a phase difference of about 180 degrees with...
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7340233 |
Integrated circuit and methods for third sub harmonic up conversion and down conversion of signals
An integrated circuit may include a receiver and/or a transmitter that performs third order sub-harmonic conversion. The integrated circuit may include a Gilbert cell active mixer with three or...
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7327406 |
Methods and apparatus for implementing a receiver on a monolithic integrated circuit
A monolithic integrated circuit includes a tuner and a SAW filter function. The tuner receives a radio frequency (RF) television signal that has a range of fundamental frequencies from 55 mega...
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7324793 |
Wireless transmission device capable of transmitting media from multiple channels
A wireless transmission device capable of transmitting media from different channels concurrently. The transmitter of the device places the inputted TV signals and an audio/video signal on...
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7308230 |
Device and method to locally fill gaps in spotbeam satellite systems with frequency re-use
Systems and methods for transmitting and receiving diverse signals across regions using a minimum of frequency capacity and maintaining compatibility with the heritage system. A system of the...
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7305217 |
Low cost planar double balanced mixer
A double balanced mixer includes a local oscillator balun, a radio frequency balun and four diodes. The local oscillator balun has a transmission line, a half wavelength transmission line and a...
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7269424 |
Mobile terminal implementing a ranging signal receiver and method
Mobile terminal implementing a ranging signal receiver and method. Means are provided to incorporate ranging signal reception capability into a mobile terminal (such as a UMTS terminal)...
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7266352 |
Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators
Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected...
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7262815 |
Harmonic mixer based television tuner and method of processing a received RF signal
A first local oscillator operating at a first frequency provides a first reference signal and a second reference signal. The second reference signal is the first reference signal phase shifted by...
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7236756 |
Tuning signal generator and method thereof
A front end tuning system includes a tuning signal generator. The tuning signal generator includes a digital-to-analog converter (DAC) to receive a pre-conditioned tuning signal at a reference...
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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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7181186 |
Mixer and frequency conversion apparatus for improving phase-mismatching
A frequency conversion apparatus having a mixer eliminates phase miss-matching between two intermediate frequency (IF) signals having the same frequency and a 90 degree difference in phase. The...
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7171184 |
Method and apparatus for a gain controlled mixer
A gain controlled mixer for an integrated CMOS transceiver. Accuracy of the controlled gain may be relatively invariant over temperature, manufacturing process, and other variations attendant to...
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7164905 |
High frequency module
Heretofore, a plurality of packages were used in a high frequency module in which a plurality of waveguide terminals were positioned resulting in problems, such as degradation of characteristics in...
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7142809 |
Device and method to locally fill gaps in spotbeam satellite systems with frequency re-use
Systems and methods for transmitting and receiving diverse signals across regions using a minimum of frequency capacity and maintaining compatibility with the heritage system. A system of the...
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7142808 |
Satellite broadcast receiver apparatus intended to reduce power consumption
A satellite broadcast receiver apparatus includes a plurality of signal conversion units provided corresponding to a plurality of signals transmitted from one or more satellites, each signal...
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7139329 |
Receiver in a radio communication system
A receiver has a low spurious level and a high frequency precision without increasing power consumption of a local oscillator. The receiver comprises first and second local oscillators; a phase...
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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...
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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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7091828 |
Interrogators, methods of operating a coherent interrogator, backscatter communication methods, interrogation methods, and signal processing methods
The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides a...
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7088979 |
Triple conversion RF tuner with synchronous local oscillators
An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to generate an upconverted signal in response to an input signal and a first...
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7075585 |
Broadband receiver having a multistandard channel filter
A television (TV) receiver includes a multi-standard channel filter with a programmable intermediate frequency adapted to receive television signals in a variety of television standards and...
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7072649 |
Multiple purpose antenna system
A multiple purpose antenna system for installation on a highway truck to receive and transmit signals. The system includes an antenna for communication of electromagnetic frequency signals having...
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7046960 |
Relay apparatus
While a spectrum waveform of an output signal from a subtracter ( 207 ) is visibly monitored, an operator controls a variable phases shifter ( 208 ) based upon a second control signal (CL 2 ) so...
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7023948 |
Frequency converter arrangement
A frequency arrangement with at least two successive heterodyne stages, one of which converts an input signal with an adjustable first frequency of a superposition oscillator that can be set in...
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7016662 |
Method and apparatus for up-conversion of radio frequency (RF) signals
This patent describes a method and system which overcomes the LO-leakage problem of direct conversion and similar RF transmitters. To solve this problem a virtual LO™ signal is generated within...
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6909470 |
Digital broadcast recorder
A digital broadcast recorder capable of recording digital television (TV) signals includes a first frequency converter which converts a received digitally modulated TV signal into a first...
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6847808 |
Ultra-high linearity RF passive mixer
A CMOS implemented passive mixer circuit for improving linearity performance in wireless communication systems is described, including dual pairs of NMOS FETs and dual pairs of PMOS FETs. Each NMOS...
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6842610 |
Tuner
A tuner includes an input terminal, first to fourth band-pass filters, an automatic gain controller, first to third amplifiers, first and second mixers, first and second voltage controlled...
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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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6737945 |
Digital broadcast receiving tuner suitable for miniaturization by placing tuner units on oppos surfaces on a board
A low-priced digital broadcast receiving tuner suitable for miniaturization will be provided. According to the present invention, it is possible to provide a low-priced digital broadcast receiving...
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6731906 |
Method and system for determining the phase and amplitude of a radio occultation signal
The present system for determining the phase and amplitude of a radio occultation signal modifies the traditional Open Loop tracking process to maximize the signal-to-noise ratio, minimize the...
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6657678 |
Digital broadcasting receiver
A digital broadcast recorder capable of recording a digital television (TV) signals, includes a first frequency converter which converts a received digitally modulated TV signal into a first...
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6603391 |
Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides a...
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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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6545728 |
Digital television receivers that digitize final I-F signals resulting from triple-conversion
Receiving apparatus for digital television signals digitizes a final intermediate frequency signal supplied from a triple-conversion radio receiver and synchrodynes the digitized final intermediate...
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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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6437631 |
Analog multiplying circuit and variable gain amplifying circuit
A first analog differential signal V 1 p and a first analog differential signal V 1 n are applied to the respectively commonly-connected bases of two sets of differential pairs which are...
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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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6308048 |
Simplified reference frequency distribution in a mobile phone
A mobile radio telephone having a simplified architecture including a reduced number of integrated circuits and a reduced number of RF connections. A dual band, dual mode mobile phone can be...
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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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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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6134427 |
Using a single low-noise amplifier in a multi-band wireless station
A wireless communication device, such as a dual-mode cellular phone, receives radio frequency (RF) signals in either of two communication bands. Each received RF signal is passed to two bandpass...
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6131023 |
Cable modem tuner with an up-stream and a reception circuit in the same casing
A cable modem tuner includes, in the same casing, an up-stream circuit to transmit an up-stream data signal to a CATV station, and a reception circuit for receiving a down-stream signal via a HPF...
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6125268 |
Tuning bandwidth minimization for low voltage dual band receiver
A mobile radio telephone having a minimized tuning bandwidth, based on limiting intermediate frequencies at the highest and lowest expected receive frequencies in each band. A dual band, dual mode...
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6118499 |
Digital television signal receiver
A first mixer outputs a TV signal of a first intermediate frequency (the first IF) by up-converting an input signal. A second mixer outputs a TV signal of the second intermediate frequency (the...
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