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Patent # Description
US-8,138,856 High-frequency acoustic wave device
An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said...
US-8,138,855 Device with an electroacoustic balun
A device has an electroacoustic interface between interfaces for balanced electrical signals and unbalanced electrical signals (i.e. a balun) includes a film of...
US-8,138,854 Filter, branching filter and communication apparatus
A filter includes: a converter circuit, provided with a single-type common terminal and two balanced terminals, for performing conversion between a balanced...
US-8,138,853 Front-end architecture of RF transceiver and transceiver chip thereof
An RF front-end architecture is operated in either a transmitting or a receiving mode. The RF front-end architecture comprises an antenna, an impedance match...
US-8,138,852 Duplexer and transceiver
A duplexer according to the present invention includes a first port, a second port and a third port for external input/output, a first path formed between the...
US-8,138,851 High bandwidth programmable transmission line equalizer
A transmission line equalizer includes multiple signal paths connected in parallel between an equalizer input signal and an output amplifier where each signal...
US-8,138,850 Feeding apparatus for a semi-circular shape waveguide with feeding segments offset from the midpoint of the...
A feeding apparatus is utilized for a waveguide. The waveguide includes an opening and a bottom periphery around the opening. The bottom periphery includes a...
US-8,138,849 Transmission lines applied to contact free slip rings
A non-contacting rotary interface has a first core with a first pair of balanced transmission lines coupled to the first core and a second core moveable in...
US-8,138,848 Circulator/isolator with an asymmetric resonator
The present invention is directed to a circulator device that includes a housing defining an interior three-dimensional volume. The housing includes a plurality...
US-8,138,847 Temperature and/or voltage independent voltage controlled oscillator with programmable gain and/or output...
An apparatus comprising a transconductance control circuit, a boost control circuit, a current computation circuit and an oscillator circuit. The...
US-8,138,846 Precision, temperature stable clock using a frequency-control circuit and a single oscillator
A frequency-control circuit, which is configured to receive a first signal having a first untuned frequency from a first oscillator, and to alter one or more...
US-8,138,845 Method and apparatus for auto-frequency calibration for multi-band VCO
A method and apparatus for auto-frequency calibration for multi-band VCO have been disclosed where a VCO is first adjusted to a major frequency band and then...
US-8,138,844 System and method for crystal oscillator frequency tuning
An oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, a first switched capacitor coupled to a first...
US-8,138,843 Gated ring oscillator for a time-to-digital converter with shaped quantization noise
Described is a compact, lower power gated ring oscillator time-to-digital converter that achieves first order noise shaping of quantization noise using a...
US-8,138,842 PLL frequency synthesizer
A frequency synthesizer includes a voltage-controlled oscillator, a frequency range tuning circuit which detects a frequency control code that sets a...
US-8,138,841 Apparatus and method for controlling the output phase of a VCO
A method and apparatus controlling the output phase of a VCO (Voltage Controlled Oscillator). The apparatus has a phase locked loop 20 having a first input 21...
US-8,138,840 Optimal dithering of a digitally controlled oscillator with clock dithering for gain and bandwidth control
A digital phase locked loop (DPLL) and method include an adjustable delay line configured to receive a reference clock as an input and to output a dithered...
US-8,138,839 Wideband CMOS gain stage
A CMOS gain stage includes biasing circuitry configured to insure saturation of a subsequent stage without a source follower circuit. The CMOS gain stage is...
US-8,138,838 Electron beam switch
The present invention is directed to an electron beam crossbar switch for interconnection between communication units. The crossbar switch includes an array of...
US-8,138,837 Efficient power amplifier
A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail,...
US-8,138,836 Emitter-follower type bias circuit
An emitter-follower bias circuit supplying a bias voltage to the base of an amplification transistor includes: a depletion mode FET boosting a reference...
US-8,138,835 Wide band LNA with noise canceling
Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise...
US-8,138,834 Current control circuit, class AB operational amplifier system and current control method
A current control circuit for controlling a bias current of a class AB operational amplifier includes: a low current source, for generating a low bias current;...
US-8,138,833 Common-mode feedback amplifier
A circuit is provided for use with a reference voltage. The circuit includes a voltage source, a common-mode feedback amplifier and a feedback impedance...
US-8,138,832 Class-D amplifier
Class D amplifier is provided. The class D amplifier includes at least a block; each block includes an input circuit, an integrator, a comparator, a driving...
US-8,138,831 Low noise amplifier
A method for low noise signal amplification includes modifying a signal by way of a first amplification stage and conveying the modified signal to a second...
US-8,138,830 Variable gain instrumentation amplifier
Techniques for providing an instrumentation amplifier having a plurality of selectable gain settings. In an exemplary embodiment, a gain adjustment block for...
US-8,138,829 Segmented power amplifier with varying segment activation
Various apparatuses and methods for varying segment activation in a segmented power amplifier are disclosed herein. For example, some embodiments provide a...
US-8,138,828 Active mute scheme for an amplifier
Conventional muting circuitry for amplifiers (which usually uses clamps) generally has about 20-30 dB of attenuation. Here, an integrated circuit or IC is...
US-8,138,827 Filter compensation for switching amplifiers
Embodiments of the present invention provide methods and systems for limiting bipolar current flow in a switching amplifier. Embodiments of the present...
US-8,138,826 Apparatus and method for complete elimination of input coupling capacitors in signal amplification
A circuit and method for signal amplification is provided. The circuit includes an amplifier including an input amplifier that is arranged to receive an input...
US-8,138,825 Multi-chip stack structure and signal transmission method thereof
A multi-chip stack structure and a signal transmission method are disclosed in specification and drawing, where the multi-chip stack structure includes first...
US-8,138,824 Recursive demodulation apparatus and method
A recursive demodulation apparatus is provided. Therecursive demodulation apparatus, including: a segment generation unit dividing data symbols with a residual...
US-8,138,823 Voltage generating circuit and ultrasonic diagnosing device
A voltage generating circuit generates a voltage for driving an ultrasonic oscillator, and includes a multi-stage connected power supply circuit without a...
US-8,138,822 Circuits and methods for calibrating switching current sources
In one embodiment the present invention includes circuits and methods for calibrating switching current sources. A difference between a source current and a...
US-8,138,821 High voltage pumping circuit
A swing width control circuit and a high voltage pumping circuit using the same are disclosed. The swing width control circuit includes a swing width controller...
US-8,138,820 Peak power reduction methods in distributed charge pump systems
A distributed charge pump system uses a delay element and frequency dividers to generate out of phase pump clock signals that drive different charge pumps, to...
US-8,138,819 Driving transistor control circuit
A control circuit controls a driving transistor connected in series with an electrical load between a power supply voltage and a ground. The control circuit...
US-8,138,818 Gate drive apparatus
A gate drive apparatus including a constant-current-pulse gate drive circuit which creates a gate signal for a switching device as a constant-current output, a...
US-8,138,817 Passive harmonic-rejection mixer
An electronic device comprising a passive harmonic-rejection mixer. The passive harmonic rejection mixer has an input connected to several sub-mixer stages, and...
US-8,138,816 Digitally controlled high Q factor capacitor
A control circuit and a conversion circuit. The control circuit may be configured to generate an analog control signal in response to a digital control signal....
US-8,138,815 Level converter
A level converter for providing an output signal at a circuit output based on an input signal includes an output coupling circuit formed to provide an output...
US-8,138,814 High signal level compliant input/output circuits
A signal driver for an interface circuit has a first stage level shifter to accept input signals and output signals at a first signal level. The signal driver...
US-8,138,813 Interface circuit
An interface circuit according to one aspect of the present invention may include a receiving circuit operating on a supply voltage lower than a high-level...
US-8,138,812 Device for generating clock in semiconductor integrated circuit
Various embodiments of a semiconductor integrated circuit. According to one exemplary embodiment, a semiconductor integrated circuit includes a multi-phase...
US-8,138,811 Key press detecting circuit
A key press detecting circuit for detecting the status of the key is provided. The key press detecting circuit comprises a discharging circuit which discharges...
US-8,138,810 Method and apparatus for pulse width modulation
An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. A circuit according to aspects of the present...
US-8,138,809 Periodic signal delay apparatus, systems, and methods
Apparatus, systems, and methods are disclosed that operate to delay a periodic input signal in one or more delay elements of a group of delay elements to...
US-8,138,808 Circuit for detecting phase imbalance of signals
A circuit for detecting a phase imbalance of signals includes a conversion block and a comparator coupled to the conversion block. The conversion block...
US-8,138,807 Power-on detecting circuit and level converting circuit
When a low supply potential has risen while a high supply potential has not risen, a logical value "0" is output as an output signal by applying a ground...
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