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7612629 Biased nonlinear transmission line comb generators  
Comb generators include a nonlinear transmission line (NLTL) having one or more NLTL sections. Each NLTL section includes one or more nonlinear elements and transmission line portions that provide...
7576616 Phase controlling apparatus, frequency controlling apparatus, oscillating apparatus, phase controlling method, and frequency controlling method  
A phase controlling apparatus is disclosed. The phase controlling apparatus controls phases of signals which are output from a plurality of signal sources corresponding to first phase information...
7570120 Multichannel memory-based numerically controlled oscillators  
A multichannel numerically controlled oscillator is provided. The multichannel numerically controlled oscillator has a dual port memory. An output function generation lookup table in the dual port...
7557619 Digital frequency synthesis  
Method and apparatus for digital frequency synthesis are described. A frequency synthesizer has an accumulator, an adder, and a predictive filter. The adder is configured to subtract a predicted...
7498852 Phase error correction circuit for a high speed frequency synthesizer  
Circuits, methods, and apparatus for adjusting an NCO output in order to provide a signal that is phase-locked to a reference signal. This is particularly beneficial where the frequencies of the...
7385543 Systems and methods for asynchronous triggering of an arbitrary waveform generator  
A system and method for asynchronous triggering in a waveform generator comprising a DAC sample clock for generating DAC sample clock signal. The system includes a sequencer clock for generating a...
7382202 Apparatus and method to provide a local oscillator signal from a digital representation  
An apparatus provides a local oscillator signal based on a selected channel of an RF input signal. For example, the apparatus can set a frequency of the local oscillator signal based on the...
7345619 Generating event signals in a radar system  
A radar system having a transmit signal path and a receive signal path and an event generator which is responsive to command signals provided by a digital signal processor (DSP) is described. The...
7242225 Direct digital frequency synthesizer  
A frequency synthesizer according to the direct digital synthesis method is provided. The frequency synthesizer includes a phase accumulator for the cyclical incrementation of a phase signal by a...
7224884 Design method for a video signal processing integrated circuit and integrated circuit and video signal processing apparatus thereby  
A video signal processing apparatus and a design method therefor are provided, and more particularly, a design method for a video signal processing integrated circuit (IC), in which to solve the...
7202709 Waveform output device and drive device  
A waveform output device includes a data reception unit which receives at least a part of a waveform pattern generation program transmitted from an external device connected to the data reception...
7193449 Method and apparatus for generating multi-phase signal  
A multi-phase signal generating apparatus is provided for readily generating multiple phase signals. The multi-phase signal generating apparatus comprises a signal data storage which stores a...
7154431 Signal synthesizer and method therefor  
A digital synthesizer includes a digital radio frequency memory (DRFM) for storing phase values and corresponding digital signals. The digital synthesizer includes a digital processing circuit...
7154346 Apparatus and method to provide a local oscillator signal  
An apparatus provides a local oscillator signal based on a selected channel of an RF input signal. For example, the apparatus can set a frequency of the local oscillator signal based on the...
7126862 Decoder for memory device  
A decoder for a memory device includes driving devices each applying a respective line voltage to a respective line of the memory device when turned on. The decoder also includes a control device...
7109808 Polyphase numerically controlled oscillator and method for operating the same  
A polyphase numerically controlled oscillator (PNCO) is defined to include a plurality of sub-numerically controller oscillators (SNCO's). Each SNCO is capable of receiving a clock signal at a...
7103622 Direct digital synthesizer with output signal jitter reduction  
A method and apparatus for reducing unwanted harmonics in direct digital synthesizer (DDS) output. The method comprises the steps of providing a set of k phase-shifted clock signals, examining, in...
7079143 Waveform drawing system and method  
A waveform drawing routine is disclosed that includes receiving an array of predecessor image data points, wherein the predecessor image data points form a predecessor line that has a predecessor...
6985701 Frequency synthesizer and multi-band radio apparatus using said frequency synthesizer  
There is disclosed a frequency synthesizer having an HF synthesizer for generating a first reference frequency signal having a variable frequency in a high-frequency band as a unit synthesizer, an...
6947334 Semiconductor memory device capable of calibrating data setup time and method for driving the same  
There is provided a synchronous memory device, in which a data input setup timing is calibrated. The synchronous memory device includes: a data input unit for calibrating a timing of data inputted...
6922089 Digital frequency synthesizing circuit and system thereof using interpolation and linear feedback shift register (LFSR)  
The present invention provides an all-digital frequency synthesizer circuit using interpolation technique and Linear Feedback Shift Register (LFSR). This synthesizer adaptively outputs two...
6890046 Driving waveform generator and method of generating driving waveform  
The present invention provides a technique that prevents a shift of a driving waveform due to accumulation of errors in a process of generating the driving waveform to drive driving elements on a...
6876261 Phase lock for synthesizer phase reference oscillator  
A phase lock for a synthesizer phase reference oscillator that is used in conjunction with a conventional DDS circuit to synthesize an RF output frequency includes a second DDS circuit that is...
6862483 Apparatus for changing pulse width modulation at desired timing  
A device generating a pulse signal includes at least one first register which stores waveform data therein, a pulse signal generation unit which generates a pulse signal in accordance with the...
6847235 Bus driver  
An output driver includes a predriver circuit coupled to a complimentary MOS transistor pair. Third and fourth complimentary MOS transistors are coupled between a source-drain pair of the first and...
6825729 Frequency synthesizer with sigma-delta modulation  
A frequency synthesizer, especially for mobile radio base stations, transforms a digital input signal having a first frequency rapidly into a digital output signal having a second frequency....
6822487 Method and apparatus for synthesizing and utilizing waveforms  
A method is provided for synthesizing an arbitrary waveform that approximates a specific waveform. The method includes specifying respective frequencies of component waveforms to be used to...
6785345 Frequency dithering for DDS spectral purity  
A frequency dither technique is used for reducing spurs due to phase increment errors in a direct digital synthesizer output sinusoid. The spurs for a desired output frequency are calculated and,...
6781473 High-speed low-power implementation for multi-channel numerically controlled oscillator (NCO)  
Method and apparatus for generating sinusoidal signals in quadrature. A numerically controlled oscillator includes a phase accumulator configured to generate a periodic multi-bit signal at a given...
6731757 Multichannel digital signal generation method and apparatus  
A method of and apparatus for digitally generating a broadband signal comprising a plurality of CW or quadrature modulated signals having incrementally related frequencies wherein said plurality of...
6711518 Method for electronically aligning the frequency of an infrared transmitter  
A method is provided for aligning the center frequency of an infrared transmitter. The method comprises the steps of: (a) providing a voltage-controlled oscillator for driving the infrared...
6664819 Frequency synthesizer for improving a unique DDS characteristic  
A frequency synthesizer that improves a unique DDS characteristic, while maintaining a circuit scale (ROM size) of a direct digital synthesizer (DDS). A first digital signal generator generates a...
6650150 Numerically controlled oscillator in particular for a radiofrequency signal receiver  
The numerically controlled oscillator ( 8 ) is mounted in particular in a radiofrequency signal receiver which further includes means ( 3 ) for receiving and shaping the radiofrequency signals, a...
6625765 Memory based phase locked loop  
A circuit comprising a phase detector/correction circuit, at least one column of memory cells, a control circuit and a sense amplifier. The control circuit may be configured to read a sequence from...
6611156 Waveform data generation apparatus  
A first waveform data storage portion stores sine wave data or cosine wave data in either of the angular sections on both sides of a zero-crossing point of a sine wave or a cosine wave, each of the...
6597208 Digital synthesizer with coherent division  
A direct digital frequency-synthesis device includes a modulo-M coherent accumulator that generates a first phase law from a frequency-control word. A table, addressed by a second phase law derived...
6587516 Subscriber unit producing a modulated digital frequency  
A subscriber unit has a processor. The processor provides an output phase signal corresponding to a selected output digital frequency. A tuning register buffers the phase signal. A lookup table has...
6564334 Programmable output generator  
A memory mapped programmable output generator, capable of producing events such as creating complex waveforms, triggering analog to digital and digital to analog conversions, and generating...
6556051 Apparatus for providing both supports including synchronous dynamic random access memory (SDRAM) module and double data rate (DDR) DRAM module  
An apparatus for providing both supports including synchronous dynamic random access memory module and the double data rate dynamic random access memory module is provided. A motherboard can...
6518802 Circuits and methods for generating an accurate digital representation of a sinusoidal wave  
A numerically controlled oscillator that generates an accurate digital representation of a repeating waveform such as a sinusoidal wave. Based on the desired output frequency, multiple samples are...
6483388 Direct digital frequency synthesizer and a hybrid frequency synthesizer combining a direct digital frequency synthesizer and a phase locked loop  
A direct digital frequency synthesizer and a hybrid frequency synthesizer combining the direct digital frequency synthesizer and a phase locked loop is provided. The direct digital frequency...
6459404 DDS spur mitigation in a high performance radar exciter  
A technique is described for providing a pulsed radar exciter signal, in a radar exciter including a direct digital synthesizer (DDS). The DDS is reset pulse-to-pulse to provide a pulsed DDS signal...
6456145 Non-linear signal correction  
Signal correction in a bipolar transistor circuit having a base-emitter voltage and a non-linear output signal corresponding to a detectable characteristic is improved by correcting non-linearity...
6449192 Programmable read-only memory generating identical word-line voltages from different power-supply voltages  
A programmable read-only memory supplied with power at a specified voltage has word-line drivers that drive the word lines of the memory-cell array to the same potential, regardless of whether the...
6429796 Method and device for spectrally pure, programmable signal generation  
A method for generating a waveform at a particular frequency in which a segment RAM depth is determined based on the relationship between the frequency and a variable clock value, a RAM based...
6396314 Arrangement for the warbling (sweeping) of a frequency synthesizer  
For sweeping a frequency synthesizer, which is digitally tunable in frequency in small steps to have a predetermined frequency progression over time, a clock signal of an accumulator generating...
6373314 Clock generator and digital or telephone portable terminal using the same  
A clock generator for a multi-system comprising a TCXO (temperature compensated crystal oscillator) 1 controlled by an AFC (automatic frequency control) circuit 12 and a sub-system operative...
6373294 Microprocessor stabilized frequency source and method for generating a stable-frequency signal  
An apparatus for generating a supply signal at a predetermined frequency comprises a digital synthesizer connected with an oscillator and a processor; and a temperature sensor connected with the...
6366174 Method and apparatus for providing a clock generation circuit for digitally controlled frequency or spread spectrum clocking  
An improved clock generation circuit is provided that operates with a single input clock frequency, and includes a Phase Locked Loop circuit (PLL) with a digital accumulator in the feedback loop,...
6359476 Frequency correction circuit for a periodic source such as a crystal oscillator  
A frequency correction circuit includes a temperature sensor ( 100 ) disposed to measure temperature and produce temperature signals representing sensed temperatures. A data supplier ( 110 ) stores...
Matches 1 - 50 out of 191 1 2 3 4 >