Matches 1 - 50 out of 312 1 2 3 4 5 6 7 >
Match Document Document Title
7636002 Clock multiplier and method of multiplying a clock  
A clock multiplier for multiplying an input clock by N includes a phase/frequency detector, a clock selector, and a voltage-controlled delay line. The phase/frequency detector generates a first...
7602386 Reference clock signal generation circuit, power supply circuit, driver circuit, and electro-optical device  
A reference clock signal generation circuit for generating a reference clock signal for a charge-pump operation which raises or lowers a voltage includes a clock signal generation circuit which...
7598782 Circuit for changing a frequency  
A circuit is provided for multiplying a frequency by a cascade formed of a transadmittance having a transfer characteristic and a transimpedance having a transfer characteristic. The...
7579884 Frequency doubler device  
A frequency doubler circuit includes first and second arrangements of switches connected to the positive and negative inputs of a comparator, respectively, and arranged in such a way that first and...
7577418 Sub-harmonic mixer and down converter with the same  
A sub-harmonic mixer and a down converter with the sub-harmonic mixer are provided. The sub-harmonic mixer includes a differential amplifying unit, a current buffer unit, and a switching unit. The...
7551742 Acoustic signal-processing apparatus and method  
A band-dividing unit is operable to extract a low frequency component from an input signal in order to generate overtones based on the extracted low frequency component, and is further operable to...
7529533 Configurable homodyne/heterodyne radio receiver and RFID reader employing same  
The embodiments of the present invention provide a configurable homodyne/heterodyne RF receiver including first and second mixers. The configurable homodyne/heterodyne RF receiver functions as a...
7509107 Method and apparatus for extending the lower frequency operation of a sampler based VNA  
Circuitry is provided to drive a step recovery diode (SRD) ( 8 ) in a sampler based vector network analyzer (VNA) that allows harmonic samplers ( 10, 11 ) to operate over many octaves. The circuit...
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...
7495496 Method and circuit for producing spread spectrum and/or over clock signal  
The present invention is to provide a method and circuit for producing spread spectrum and over clock, which includes a primary circuit and a secondary circuit, wherein the primary circuit uses a...
7495484 Programmable frequency multiplier  
A programmable frequency multiplier device which includes a frequency doubler section configured to receive an input signal having a frequency f, and to output doubled signals, each of the doubled...
7486124 Current-controlled CMOS logic family  
Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C 3 MOS) logic fabricated in conventional CMOS process technology. An entire family of logic...
7466786 Rational number frequency multiplier circuit and method for generated rational number frequency  
A rational number frequency multiplier circuit and a method for generating rational number multiple frequency are disclosed. The circuit receives a plurality of input signals having the same...
7459946 Circuit arrangement for generating a reference signal  
In a circuit arrangement for generation of a reference signal with an oscillation generator, a phase-controlled filter and a frequency multiplier are arranged downstream from the oscillation...
7456666 Frequency-doubling delay locked loop  
A frequency multiplier circuit comprising a delay line receiving at one end thereof a reference clock for generating clock tap outputs from respective ones of a plurality of period matched delay...
7447511 Method and device for equalizing mode selection  
A method and a device for equalizing mode selection are disclosed. The method comprises steps of: providing first sampling pulses in response to an equalized signal; providing second sampling...
7436166 Direct digital synthesizer producing a signal representing an amplitude of a sine wave  
The invention is directed to a digital phase detector that comprises a splitter and phase shifter to receive a signal of a device under test and produce a first signal that is substantially...
7414443 Frequency multiplier  
A device is provided for multiplying the pulse frequency of a pulse train signal. The device includes input means for the signal and means for accessing the signal at points with a predetermined...
7394299 Digital clock frequency multiplier  
A digital clock frequency multiplier ( 100 ) for increasing an input frequency of an input clock signal includes a generator ( 102 ) that receives the input clock signal and a high frequency...
7388412 Clock multipliers using filter bias of a phase-locked loop and methods of multiplying a clock  
A clock multiplier includes a phase-locked loop (PLL), a bias generator, a counter, a selection circuit, a flip-flop, a phase comparator, a delay controller and a variable delay circuit. The...
7373113 Frequency generation apparatus and method for data transmission  
A reference frequency generation method and apparatus for communication systems that transmit and receive data by use of an ultra wide band of at least two frequency groups having at least two...
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...
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...
7295048 Method and apparatus for generating spread spectrum clock signals having harmonic emission suppressions  
A method for generating spread spectrum clock signals having harmonic emission suppressions is disclosed. A set of delayed clock signals is initially generated by delaying a high-speed clock signal...
7271631 Clock multiplication circuit  
A clock multiplication circuit simple in configuration, easy to adjust the characteristics thereof, and capable of shortening lockup time. The circuit delivers an output clock signal at a frequency...
7253842 Locking display pixel clock to input frame rate  
To match the output frame rates to the input frame rates, a display clock signal is generated that has a frequency locked to the frequency of a reference clock signal. To generate the display clock...
7245164 Radio frequency doubler  
When a signal of a double frequency is generated from the original signal, conventionally a 90-degree phase-shift circuit is necessary to suppress an output of a DC component and efficiently obtain...
7236058 Low frequency doubler  
A circuit and corresponding method for doubling the frequency of an input signal, even when the input signal is of low frequency or a square wave. The input signal is applied to a phase-shifting...
7218156 Supply tracking clock multiplier  
A circuit for and method of operating a supply tracking clock multiplier is provided. An embodiment of the present invention may permit a less power consuming portion of an integrated circuit to...
7212045 Double frequency signal generator  
A double frequency signal generator to which a synchronization signal having a duty cycle of 1% to 999% is inputted. The synchronization signal is used for triggering of a switching component at...
7196560 Clock frequency multiplier and method for multiplying a clock frequency  
A clock frequency multiplier is provided. The clock frequency multiplier comprises a tracking circuit, a pulsing circuit, and a shaping circuit. The tracking circuit receives a clearing signal and...
7187917 Current interpolation in multi-phase local oscillator for use with harmonic rejection mixer  
A circuit provides a reduced harmonic content output signal OUTA and/or OUTB that is modulated according to an input signal 231 . The circuit has an oscillator circuit 210 and a harmonic...
7180340 Frequency multiplier capable of adjusting duty cycle of a clock and method used therein  
Provided is a frequency multiplier including a delay circuit, an XOR gate, and a control circuit and a method of operating such a frequency multiplier to adjust the duty cycle of a clock signal....
7161394 Digital phase mixers with enhanced speed  
Digital phase mixers with enhanced speed are provided. A phase mixer generates a signal having a phase between the phases of two input signals based on select signals. The propagation delay of the...
7133484 High-frequency clock generator with low power consumption  
A high-frequency clock generator with low power consumption is made up of a single phase-locked loop and a serially-connected sampling circuit coupled thereto. The phase-locked loop includes a...
7123063 Supply tracking clock multiplier  
A circuit for and method of operating a supply tracking clock multiplier is provided. An embodiment of the present invention may permit a less power consuming portion of an integrated circuit to...
7091757 Frequency generator and communication system  
The object of the invention is to provide a frequency generator which is composed of an oscillator and a frequency doubler and in which difference in amplitude between differential outputs of the...
7078940 Current comb generator  
The current comb generator periodically applies current spikes to a power supply signal in the time domain to produce a series of current spikes at different frequencies in the frequency domain.
7061285 Clock doubler  
A clock doubler including clock doubling circuitry for generating from a system clock a clock signal having a frequency substantially double that of the system clock and also having a pulse width...
7039383 Quadrature mixer circuit including three-input local mixers  
In a quadrature mixer circuit for receiving a radio frequency signal to generate first and second quadrature output signals, a first three-input mixer receives the radio frequency signal, a first...
7031372 Multiple user reconfigurable CDMA processor  
A circuit consistent with certain embodiments of the present invention has a source of N reference clock frequencies ( 230 ), where N is an integer greater than one. N frequency extender circuits (...
6999747 Passive harmonic switch mixer  
A passive harmonic switch mixer is shown that is immune to self mixing of the local oscillator greatly reducing leakage noise, pulling noise, and flicker noise when used in a direct conversion...
6982583 Current-controlled CMOS circuit using higher voltage supply in low voltage CMOS process  
Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C 3 MOS) logic fabricated in conventional CMOS process technology. An entire family of logic...
6980036 Semiconductor device comprising frequency multiplier of external clock and output buffer of test data and semiconductor test method  
In a frequency multiplier and a method of multiplying a frequency of an external clock signal, a data output buffer, and a semiconductor device including the frequency multiplier and the data...
6977536 Clock multiplier  
A clock multiplier capable of modulating the duty cycle of the output clock comprises a first clock multiplication circuit, an inverter, a first low pass filter, a second low pass filter and an...
6937082 Information processing apparatus with clock generating circuit and information processing apparatus with clock delaying circuit  
A multiplication circuit and a phase synchronization circuit as components of a digital PLL circuit adjust an oscillation frequency and a phase, respectively, of a multiplied clock by adjusting a...
6937073 Frequency multiplier with phase comparator  
A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be...
6927639 Method and apparatus for generating high frequency signals by a plurality of low frequency signals with multiple phases  
Method and related apparatus for realizing frequency-multiplication by generating a high frequency signal according to a plurality of low frequency signals. The method includes: according to a...
6876236 Clock multiplier circuit  
A clock multiplier circuit which generates a multiple clock having a stable frequency from a reference clock without using analog devices. The clock multiplier circuit includes ring oscillator...
6864727 Pulse generator with polarity control  
An integrated clock doubler and polarity control circuit are described. The circuit provides high speed response between an input signal and an output signal, achieving clock doubling by passing...
Matches 1 - 50 out of 312 1 2 3 4 5 6 7 >