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8184681 |
Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting
Systems, methods and apparatus for improving the coverage of a wireless network based on frequency shifting scheme. A wireless signal in a frequency band is shifted to another distinct band, and...
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8185368 |
Mixed-domain analog/RF simulation
A simulation environment is disclosed wherein both analog and RF signals are simulated in a single flow by a mixed-domain simulator. The simulator includes a simulator kernel with an analog solver...
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8185067 |
Modulation method and apparatus
A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty...
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8180304 |
Efficient power amplifier
A technique for efficient power amplification includes providing multiple baseband signals to an amplifier. The signals may be converted to RF and combined through one or more impedance inverters.
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8175552 |
Filter circuit, wireless transmitter, and wireless receiver
A filter circuit is constructed of a passive mixer and a frequency response device. The passive mixer generates a frequency-converted signal by mixing an input signal transmitted through a...
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8165541 |
Radio transmitter for modulating a carrier wave
A radio transmitter for modulating a carrier wave in a predetermined frequency with given information to transmit the modulation signal through an antenna having a predetermined resonance frequency...
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8160502 |
System of communication using microwave signals over wireline networks
The present invention provides a system for wide-range microwave communications over wireline networks. In an exemplary embodiment, a wide-range transceiver is made having pre-calibrated modular...
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8160516 |
Low flicker noise active mixer and method thereof
A low flicker noise active mixer comprises a trans-conductance section, a switching quad, and a load section. The trans-conductance section converts a voltage signal pair into a first current...
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8160533 |
Self-calibrating mixer
Mixer circuits (1) comprise mixers (2) for receiving input signals and oscillation signals and for outputting output signals. By providing the mixers (2) with loads (3) having adjustable load...
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8155592 |
Method for transmitting low-frequency data in a wireless intercom system
A wireless communication system including a transmitter and a receiver. The transmitter includes a first mixing module, a phase-locked loop module, reference oscillator, and a second mixing module....
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8150339 |
Switchable-level voltage supplies for multimode communications
Switchable voltage level supplies for circuitry in a multi-mode communications chipset are disclosed. In an embodiment, a first voltage level is supplied to TX circuitry operating in a first mode...
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8145155 |
Passive mixer and high Q RF filter using a passive mixer
A passive mixer include a switching architecture configured to generate differential in-phase (I) and differential quadrature-phase (Q) signals using differential components of the in-phase (I) and...
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8145181 |
Electric power transmission system for communications with noise elimination arrangement
An electric power transmission system for communications includes on/off switches; high-voltage power assemblies; groups of high-voltage devices each being powered by the high-voltage power...
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8140044 |
Mixer circuit and method of operation
A mixer circuit to mix a RF (Radio Frequency) signal with a LO (Local Oscillator) signal to generate an IF (Intermediate Frequency) signal including a dummy branch connected in parallel of a mixing...
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8116690 |
Adaptive radio transceiver with floating mosfet capacitors
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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8116677 |
Adaptive radio transceiver
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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8111183 |
Systems and methods for digital upconversion for digital signals
Systems and methods for digital upconversion of digital signals are provided. In one embodiment, the system includes a digital frequency adjustment system and a digital to analog conversion system....
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8112044 |
Transceiver system and method of using same
A transceiver is provided for wireless communication. The transceiver can include a bias source, a transformer including a primary side and a secondary side, and a switching device. During a...
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8099058 |
Enhanced wideband transceiver
A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the...
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8095103 |
Upconverter and downconverter with switched transconductance and LO masking
An upconverter and a downconverter having good performance are described. In one design, the upconverter includes first, second, and third sets of transistors. The first set of transistors receives...
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8095082 |
Dual band radio frequency transmitter
A transmitter includes a transformer and a transformer tuning circuit. The transformer transforms a differential radio frequency (RF) signal to a single-ended RF signal. The transformer tuning...
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8090318 |
Digital data processing circuit
A digital data processing circuit includes: an output unit configured to output to an audio signal processing circuit change data for changing a receiving frequency of a FM receiving device as a...
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8086189 |
Phase-to-frequency conversion for polar transmitters
The present invention relates to a polar transmission method and a polar transmitter for transmitting phase and amplitude components derived from in-phase (I) and quadrature-phase (Q) components of...
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8086188 |
Transceiver
The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider...
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8081927 |
Digital data processing circuit
A digital data processing circuit comprising: a setting unit configured to set setting data on an audio signal processing circuit configured to generate an FM modulated signal based on the setting...
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8077803 |
Quarter duty cycle pulse generator for interleaved switching mixer
An integrated transmit circuit includes a voltage controlled oscillator (702) for generating an input frequency signal (e.g., VCO) that is provided to a divide by two quadrature generator circuit...
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8068557 |
IQ-modulator pre-distortion
An IQ-modulator pre-distorter includes an iteratively updated digital filter (gQ0, gQ1) for filtering one of the branches of an IQ-signal to compensate for IQ-modulator generated amplitude errors....
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8064856 |
Modulation system and method for switched amplifiers
A power amplifier includes a baseband modulator configured to receive a baseband amplitude component and generate a baseband modulated pulse string, an oscillator configured to receive a baseband...
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8055218 |
Wireless transmitter circuit and transceiver using the same
This invention provides a wireless transmitter circuit for mobile communication apparatus and this circuit can be configured with fewer components and is suitable for downsizing. A single PLL...
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8045935 |
High data rate transmitter and receiver
A high-speed transmitter and receiver are provided. In one embodiment, a transmitter comprises a baseband processor structured to receive data and to convert the data into a multiplicity of high...
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8046621 |
Method and system for generation of signals up to extremely high frequencies using a delay block
Aspects of a method and system for generation of signals up to extremely high frequency using a delay block are provided. In this regard, a first signal may be delayed, via at least a portion of a...
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8045938 |
Discrete filter, sampling mixer, and radio device
Provided is a discrete filter capable of increasing degree of freedom of design including a DC gain. A sampling mixer (100) includes: a control signal generation unit (104) which generates a...
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8041314 |
Signal amplifier structure for radio transmitter
There is provided a modular amplifier structure that includes a plurality of parallel amplifier sub-units. Each amplifier sub-unit is configured to amplify a received payload signal under control...
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8035483 |
Oscillator tuning system and oscillator tuning method
An oscillator tuning system and an oscillator tuning method are provided. The system includes a determination unit which determines whether a power which is used in an RFID tag having an RFID...
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8036611 |
Polar transmitter, method and apparatus for phase modulation
A phase modulation method with a polar transmitter. A target frequency is first designated by comparing the RF signal with a reference frequency and the phase sample. An oscillator control word is...
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8032105 |
Multistage frequency conversion
A receiver for frequency down converting a radio frequency signal (10) using a multistage frequency (down) conversion. The radio frequency signal (10) having a center frequency that is comprised in...
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8032094 |
Discrete filter, sampling mixer, and radio device
Provided is a discrete filter capable of adjusting the number of notches and the notch frequency and easily eliminating a particular frequency component. In a sampling mixer (100), a control signal...
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8031019 |
Integrated voltage-controlled oscillator circuits
Techniques for providing voltage-controlled oscillator circuits having improved phase noise performance and lower power consumption. In an exemplary embodiment, a voltage controlled oscillator...
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8019291 |
Method and system for frequency down-conversion and frequency up-conversion
A method and system is described wherein a signal with a lower frequency is up-converted to a higher frequency. In one embodiment, the higher frequency signal is used as a stable frequency and...
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8019290 |
Two-step channel selection for wireless transmitter front-ends
A reconfigurable multimode transmitter is disclosed, operating in accordance with a two-step channel selection. The first step provides for a fine channel selection and upconversion of a desired...
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8019301 |
Calibration techniques for frequency synthesizers
In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of...
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8014724 |
System and method for signal limiting
Methods and systems for processing a signal with a corresponding noise profile are disclosed. Aspects of the method may comprise analyzing spectral content of the noise profile. At least one noise...
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8010055 |
Method and apparatus for RF communication system signal to noise ratio improvement
The signal to noise ratio performance of a RF communication system can be improved by providing resistance to transmitter self-jamming and eliminating or reducing the need for a transmit rejection...
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8005444 |
Multiple die integrated circuit assembly
An integrated circuit (IC) includes a first die, a second die, a packaging substrate, and coupling circuit. The first die includes first circuitry and the second die includes second circuitry. The...
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8005437 |
Fully integrated micro-strip VCO
A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a...
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7995969 |
Millimeter wave power conversion
A translation transceiver device consistent with certain embodiments has a 60 GHz band receiver for receiving SD type device compatible transmissions. A demodulator demodulates the SD type...
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7991368 |
Integrated RF-IF converter
A frequency conversion apparatus includes a frequency generation circuit, which is based on a first semiconductor material having a first elemental composition and is coupled to generate one or...
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7986926 |
Integrating an FM transmitter into a cellular telephone
A system includes a cellular radio and an FM transmitter that are fabricated in the same semiconductor. The FM transmitter includes at least one mixer, a filter and an antenna tuning network. The...
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7986754 |
Method and/or apparatus for stabilizing the frequency of digitally synthesized waveforms
An apparatus including a first circuit, a second circuit, a third circuit, and a fourth circuit. The first circuit may be configured to generate a demodulated signal in response to a modulated...
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7979036 |
Fully integrated ultra wideband transmitter circuits and systems
Disclosed is a novel design of a fully integrated UWB transmitter. The transmitter includes a pulse generator, a pulse modulator, and an ultra-wideband drive amplifier. A new low voltage low power...
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