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9013240 Circuit, device and method in a circuit  
A method in a circuit comprises providing a first clock by a resistor-capacitor (RC) oscillator; demodulating a plurality of input signals to form a plurality of demodulated input signals;...
8994565 Analog to digital conversion apparatus with a reduced number of ADCs  
An analog to digital conversion includes a multiplexor circuit for receiving analog input signals and, responsive to a select input, an analog to digital converter circuit to convert a selected...
8415893 Load control device, and lighting device  
Provided is a discharge lamp lighting device, which can control a load precisely while improving the practicability. When the difference of a count number (Nn) becomes a predetermined threshold...
8306147 4X over-sampling data recovery method and system  
A 4× over-sampling data recovery system consists of a charge pump PLL, a 4× over-sampler, a data regenerator and a digital PLL. The charge pump PLL receives a clock signal and generates a...
8295416 Noise-canceling frequency-to-digital converters  
Methods and apparatuses for reducing noise in frequency to digital converters (FDCs). An FDC apparatus includes a first FDC, a second FDC and a combiner. The first and second FDCs are configured...
8077757 Sampling method for a spread spectrum communication system  
Method for decoding a signal sent over a bandwidth-expanding communication system, where both channel estimation and signal detection are carried out on a set of samples generated by sampling the...
7994968 RF magnitude sampler for holographic radar  
A gated peak detector produces phase-independent, magnitude-only samples of an RF signal. Gate duration can span as few as two RF cycles or thousands of RF cycles. Response is linearly...
7785284 Joint for fluid transport lines for medical use  
The joint (36) comprises a tubular body (37) having two connecting zones (38, 39) each connected by an end to a tubular element (40) of a fluid transport line, giving continuity to passage of...
7692501 Phase/frequency detector and charge pump architecture for referenceless clock and data recovery (CDR) applications  
A stream of data may flow over a fiber or other medium without any accompanying clock signal. The receiving device may then be required to process this data synchronously. Embodiments describe...
7358781 Automation device with stored profile  
The invention relates to an automation device, in which a multiplicity of physically distributed functional units communicate with each other by means of a common transmission protocol. The device...
7095353 Frequency to digital conversion  
A technique of processing an input signal having an input signal phase is disclosed. The technique includes determining a number of transitions of the input signal within a period having a start...
7057419 Phase synchronization circuit  
In a phase sync circuit (40) which extracts a clock signal CK from a data signal D in a random NRZ format, particularly in a phase sync circuit (40) of a dual loop configuration including both a...
6535023 Linearized digital phase-locked loop method  
A method of synchronizing a clock signal to a data signal, comprising the steps of (A) detecting a first edge of the data signal, (B) determining a first value indicating a position of the first...
6389548 Pulse run-length measurement for HF data signal by dividing accumulated phase difference between first and second zero-crossings by single-cycle range using multiple cycle range sawtooth waveform  
A system and method for accurately measuring a pulse run length in a high frequency (HF) data signal while utilizing a low analog-to-digital conversion (ADC) sampling rate. Four bits are added to...
6278134 Bi-directional unipolar semiconductor light source  
A bi-directional semiconductor light source is formed that provides emission in response to either a positive or negative bias voltage. In a preferred embodiment with an asymmetric injector region...
6252428 Method and apparatus for detecting a sinusoidal signal  
A method and apparatus for detecting a sinusoidal signal samples a received signal. An error signal generator receives at its inputs two previous samples of the signal and a current sample of the...
6219394 Digital frequency sampling and discrimination  
The present invention, generally speaking, provides a very simple, all-digital method and apparatus for determining the ratio of frequencies of two signals. One of the signal may be a known...
6118306 Changing clock frequency  
A system includes a component (e.g., a processor) that includes a clock generator that generates an internal clock running at a frequency. A controller generates a clock frequency change...
5926042 Precision clock frequency detector having reduced supply voltage dependence  
A clock frequency detector is provided having a precise trip frequency which is insensitive to power supply variations. In one embodiment, the clock frequency detector employs a current source to...
5745002 Low voltage, switched capacitance circuit employing switched operational amplifiers with maximized voltage swing  
A switched capacitance circuit, using a switched operational amplifier structure as an input switch of the switched capacitance, is provided with a new biasing circuit. An additional switched...
5592111 Clock speed limiter for an integrated circuit  
A speed governor for an integrated circuit which prevents the operation of the integrated circuit above a selected frequency. The speed governor generates a frequency reference and compares the...
5537305 Synchronously tuned power converter method and apparatus  
An improved switching power supply includes a variable frequency switching circuit. The frequency of the switching circuit is varied to minimize interaction between generated power supply noise...
5513209 Resampling synchronizer of digitally sampled signals  
A digital resampling system is provided for converting a first digital signal to a second digital signal, where both signals represent the same analog signal but sampled at two different clock...
5491453 Narrow-band filter having a variable center frequency  
In a narrow-band filter for filtering an input signal having a predetermined frequency and comprising first through n-th low-pass filters (13-1 to 13-n) which are connected in parallel to one...
5416435 Time measurement system  
A time measurement system for measuring time accurately with an inaccurate clock, in which two clock oscillators are compared and the momentary error of the slower clock oscillator is measured....
5175449 Circuit for testing the frequency of a clock in an electronic system  
A clock frequency tester circuit for determining whether the frequency of a clock (FB) is comprised within a predetermined range (FA-FA/n, FA+FA/n) centered around a reference frequency (FA), is...
5105192 Method and apparatus for detecting a sampling-period sync signal from an output signal of a digital-to-analog converter  
In a method and an apparatus for detecting a sampling-period sync signal from an output signal of a digital-to-analog converter, sampling-period components are extracted from the output signal of...
5008630 Stationary probability integrator system  
A stationary probability integrator system for facilitating spectral anals of detected signals by suppressing random frequency background noise, such as ocean disturbances and marine life, and by...
4983978 Multi-frequency comb generator for radar and the like  
A multi-frequency comb generator (2-4; FIG. 1) for radar and the like using a feedback loop through a frequency multiplier, such as for example, a doubler (3). A reference or master oscillator...
4982165 Set-on oscillator  
A fast and inexpensive set-on oscillator is disclosed. According to the invention, the input signal is processed in two paths. In the first path, a coarse estimate of the input frequency is made....
4961014 Filter circuit utilizing reversible counter for generating a satisfactory hysteresis  
A filter circuit uses a reversible counter to eliminate noise from an input signal which changes between high and low levels. The input signal is sampled in response to a clock signal of selected...
4924189 Two-port switched capacitor filter netowrk with linearized phase/frequency response  
A two-port switched capacitor filter network of the type comprising two input terminals (4, 6), two output terminals (8, 10) and at least three integrator circuits (12, 14, 16) connected...
4908579 Switched capacitor sampling filter  
This filter circuit comprises at least one basic cell (2) arranged as a switched capacitor sampling filter, together with a clock suitable for defining two different states for controlling...
4890248 Method and apparatus for reducing aliasing in signal processing  
A method and apparatus for reducing the introduction of alias frequencies in the processing of signals. A sequence of jittered pulses is provided, each pulse occurring during one of a sequence of...
4763025 Frequency discrimination circuit  
In a frequency discrimination circuit, a first retriggerable monostable multivibrator is triggered in response to the period of a signal to be measured to produce a first pulse output having a...
4677322 Frequency comparator circuits  
A voltage comparator (10) includes two sampled input networks connected in arallel between an input reference voltage (Vref) and the inverting input (16) of an integrator (12,14), the other input...
4622481 Digital envelope detection circuit  
This circuit provides a digital output indicating the presence or absence of the infrared (IR) carrier signal. The incoming IR signal is sampled by a clock at a frequency which is about 4 times...
4585997 Method and apparatus for blanking noise present in an alternating electrical signal  
A noise blanking circuit for eliminating evidence of noise present in an incoming alternating electrical control signal, such as a shaft encoder or tachometer signal in a servo control circuit, is...
4540946 Variable characteristic filters  
A variable characteristic filter is described in which output signals are frequency analyzed by means of a frequency-to-voltage converter to derive a control signal. Variable impedance elements in...
4531106 Switched capacitor circuits  
A switched capacitor biquadratic filter (10; 20) includes means for dynamically shifting the level of the input voltage (VB, VD ; VX, VY,) of the amplifiers (12, 14), so that the need for a level...
4509016 Signal detecting circuit  
A signal detecting circuit detects the presence in an input signal of a component of a predetermined frequency fp. The circuit includes a sampling arrangement for sampling the input signal at...
4437066 Apparatus for synthesizing a signal by producing samples of such signal at a rate less than the Nyquist sampling rate  
A digital memory system is provided wherein a received radio frequency signal is separated into a pair of quadrature signal channels, the signals in each one of the channel being sampled and...
4370632 Multiple function operational amplifier circuit  
An operational amplifier capable of selectively performing a variety of circuit functions is provided. A single operational amplifier utilizes switched capacitors for sampling and holding an input...
4358737 Digitally controlled bandwidth sampling filter-detector  
An improved sampling filter detector circuit for sampling input signals of different frequencies and providing a detect signal when the input frequency has a desired predetermined value. The...
4329599 Switched-capacitor cosine filter  
A switched-capacitor cosine filter for a sampled-data system functions to reject extraneous frequency components of an incoming analog signal around the sampling frequency, thereby avoiding...
4307355 Method and circuit arrangement for the operation of recursive filter circuits or analog storage circuits constructed according to the charge coupled device (CCD) principle  
The invention relates to a method for operating recursive filter circuits or analog storage circuits constructed according to the charge coupled device principle and relates to a circuit...
4241311 Digital majority noise filter for bi-level data reception  
Apparatus for filtering high frequency noise pulses from alternating analog data of a frequency F, which includes means to convert the analog signal to a square wave bi-level signal, sampling the...
4197502 Digital signal detector  
A digital signal detector is disclosed that detects a serial bit stream transmitted at a predetermined bit frequency. Bit transitions are totallized in a counter over a predetermined time...
4145660 Frequency activated circuit  
Frequency-activated channel selector having means to increase and to decrease the lower boundary frequency of a selected channel. When the channel selector couples an input signal to a particular...
4127824 Sampling filter-detector  
A sampling filter-detector receives input signals of different frequencies and provides an output, or detect signal, only when the input frequency has a predetermined value essentially equal to...

Matches 1 - 50 out of 97 1 2 >