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Class 708/818 - Having tapped delay line


Subclass of Class 708 - Electrical computers: arithmetic processing and calculating
Definition: Subject matter utilizing a tapped delay line.
No. of patents: 46
Last issue date: 04/01/2008


1    
NumberTitleIssue Date
7352826Analog delay circuit
An analog delay circuit to impart a group delay to an analog input signal is described. The analog delay circuit may comprise a capacitor to impart at least a portion of the group delay to the analog output signal and a buffer circuit coupled between the capacitor a...
04/01/2008
6967988Filter for determining cross-correlation, receiver, and method of equalizing signals
A filter for determining the cross-correlation of optically transmitted signals is disclosed which comprises a ladder structure of amplifier cells 3 and multipliers 4. Such a filter structure is integrated into a receiver for optical signals, the recei...
11/22/2005
5430876Remote procedure callback system and method
A method is provided for executing an application on a compute server of a computer network or other computer system that includes the compute server and at least one client system. The client system makes a remote procedure call to the compute server, an...
07/04/1995
5249293Computer network providing transparent operation on a compute server and associated method
A method is provided for executing an application on a compute server of a computer network that includes the compute server and at least one client system, the method comprising the steps of: activating a process and a server thread running on the comput...
09/28/1993
5182530Transversal filter for parabolic phase equalization
An equalizer (10) for removing parabolic phase distortion from an analog signal (3), utilizing a pair of series connected transversal filters. The parabolic phase distortion is cancelled by generating an inverse parabolic approximation using a sinusoidal ...
01/26/1993
5173790Adaptive filter with correlation weighting structure
An adaptive filter having a correlation weighting structue having a single Bragg cell, acting as a tapped delay line and having an input and an output, the Bragg cell intensity modulating a write laser beam for computing correlation values, and modulating...
12/22/1992
5155779Optical circulating shift register
An all-optical circulating shift register encodes a received optical clock signal with a value derived from an encoded optical signal received at a control port thereof. A data input to the shift register is used to modify an encoded optical signal. The r...
10/13/1992
5032010Optical serial-to-parallel converter
An optical serial-to-parallel converter constructed from at least two optical shift registers connected in cascade, each optical shift register having a 1×2 optical switch connected to its output. Each optical shift register in the sequence is optically ...
07/16/1991
5030930Surface-acoustic-wave convolver
A strip coupled type convolver includes an aluminum nitride (AlN) layer and a semiconductor layer both provided on a single sapphire substrate, and includes many metal strips extending across a surface wave propagating path on a surface of the AlN piezoel...
07/09/1991
4805158Acoustic signal optical correlator using a light emitting diode array
An optical correlator using a light emitting diode array, in which analog gnals from two spaced sensors are correlated in order to locate and track a target. One signal is clipped and digitized and clocked through a shift register, and the other signal is...
02/14/1989
4783640Simultaneous-delay correlator apparatus
A correlator apparatus that simultaneously delays two time-varying input signals using just a single transmission line, with the signals being connected to opposite ends of the line. Directional couplers spaced along the transmission line extract delayed ...
11/08/1988
4707839Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform
In a spread spectrum communications system employing cyclic code shift keying as its primary modulation, the transmission waveform is spread for transmission security by modulo-2 adding a pseudo-noise sequence to the CCSK data symbols prior to phase modul...
11/17/1987
4605913Transversal filter having an analog shift register
A transversal filter has an analog shift register exhibiting a series input and a plurality of parallel outputs which are connected to a summing and/or subtracting circuit. A simple realization of signal weighting circuits assigned to the stages of the sh...
08/12/1986
4588255Optical guided wave signal processor for matrix-vector multiplication and filtering
An array (48, 49, 50, 51) of fiber optic couplers coupling an input (45) and an output (46) waveguide. The output waveguide (46) is routed among the couplers of the array such that either backward or forward coupling exists. With backward coupling, energy...
05/13/1986
4562312Subsampling delay estimator for an echo canceler
An estimate of delay (Ɗ) in a communication circuit is obtained by subsampling (via 110-114) signals incoming (X(K)) to and outgoing (Y(K)) from the communication circuit, obtaining a cross correlation (via 120, 121) of the subsampled signals and process...
12/31/1985
4547864Correlation detecting device
The present invention relates to a correlation detecting device which has an analog shift register consisting of a pair of minor loops, a difference detection circuit to form signals for difference between corresponding bits thereof, and a major analog sh...
10/15/1985
4543640Analog-to-digital correlator with programmable coefficients with values of +1, -1 or 0
This invention concerns an analog-to-digital correlator with programmable coefficients with values of +1, -1 or 0. This correlator comprises a charge-transfer shift register to receive samples of the analog input signal for correlation, and two programmable ...
09/24/1985
4519046Signal processing apparatus and method
Signal processing, particularly correlation and auto-correlation, is effected using a "light panel". The light panel consists of (a) an array of two-terminal light-emitting or light-modulating elements (10), the optical state of each element being changed...
05/21/1985
4475170Programmable transversal filter
A programmable transversal filter utilizes a plurality of programmable multiplying means. The result of each multiplication is summed by a summing circuit, thus providing an output signal. The delay network comprises a plurality of signal sample and hold ...
10/02/1984
4472786Analog Gaussian convolver
An analog Gaussian convolver for performing high speed convolutions of arrary functions (e.g. image arrays) with masks or operators which uses two units of 2-dimensional Gaussians G(u,v) and the like. The output of the two units are subtracted to obtain ...
09/18/1984
4470126Programmable transversal filter
A programmable transversal filter (10) utilizes a plurality of programmable multiplying means (M1 -M4). The result of each multiplication is summed by a summing circuit (7), thus providing an output signal (y(t)). The delay network o...
09/04/1984
4446532Surface charge signal processing apparatus
A plurality of charge storage cells, each including first and second storage regions and corresponding first and second electrodes insulatingly overlying the storage regions are provided in a semiconductor substrate. Means are provided for introducing int...
05/01/1984
4412301Digital data correlator
A digital data correlator is provided which detects the presence of a particular sequence, or correlating pattern, of binary data bits in a serial binary data stream, is tolerant of data errors, and is adjustable to accept different numbers of data errors...
10/25/1983
4403299Surface charge correlator
The correlator includes a plurality of charge storage cells, each including first and second storage regions and corresponding first and second electrodes insulatingly overlying the storage regions. Into each of the first charge storage regions a respective qu...
09/06/1983
4398274Within-pulse doppler scanning
The invention concerns a method and apparatus for detecting Doppler-shifted waveforms in electrical signals. A replica is derived from the waveform prior to Doppler shift and stored in a storage device as a non-uniform profile having progressively increas...
08/09/1983
4347580Array convolver/correlator
An array convolver and/or correlator comprises first and second two-dimennal shift registers defined by N rows and M columns, corresponding columns, the first, the second, etc., of the two registers being aligned. N and M are generally in the range of 4 ...
08/31/1982
4313175Linearized multiplier device for triple product convolvers
The output signals of a number of variable transconductant multipliers are inerized so as to enable a triple product convolver to calculate Fourier transforms or produce beam forming of signals more accurately. Each of the multipliers includes a differenti...
01/26/1982
4298953Programmable zero-bias floating gate tapping method and apparatus
A method and an apparatus for selectively summing the time-varying components of a plurality of electrical voltages are disclosed. The electrical voltages can each be characterized by a quiescent bias component and a time-varying small signal information ...
11/03/1981
4295204Programmable correlator
A programmable correlator correlates a sampled information signal with a programmable reference signal. The correlator utilizes a plurality of stages. Each stage includes an information register, a multiplier, and a reference register. The correlator in s...
10/13/1981
4267580CCD Analog and digital correlators
A charge-coupled device (CCD) analog and digital correlator comprises identical modules, each of which is a simple analog CCD correlator with digital input and output. Circuits are included: (1) for injecting charges proportional to the voltage sequences s(n) ...
05/12/1981
4161033Correlator/convolver using a second shift register to rotate sample values
Circular correlator/convolver for discrete sample signals having a first shift register to receive the sample signals in series and a second shift register to receive the sample signals, in parallel, from the first register to circulate these signals in t...
07/10/1979
4107550Bucket brigade circuits
The underlying concept of the invention disclosed is the use of charge partitioning for providing a precision weighted tap in a bucket brigade circuit. At the drain node of a charge conducting element in a bucket brigade device, the signal path is split i...
08/15/1978
4103333Charge coupled correlator device
A charge coupled correlator device with two pairs of registers connected in parallel, each register comprising a succession of stages through which charges pass and in each stage at least one phase and output electrode. The electrodes of the second regist...
07/25/1978
4097844Output circuit for a digital correlator
An analog output circuit for a digital correlator that may be completely integrated with the digital correlator on a single CMOS/LSI chip. The output circuit includes a compensating arrangement so that its output voltage is substantially unaffected by int...
06/27/1978
4079238Dual-CCD, real-time, fully-analog correlator
The proposed general-purpose, fully-analog device is capable of such functions as auto-correlation, cross-correlation, convolution, transversal filters, etc. at high speeds (one megahertz typical sample rates) with no analog-to-digital or digital-to-analo...
03/14/1978
4058716Surface charge signal processing apparatus
A plurality of charge storage cells, each including first and second storage regions, are provided in a semiconductor substrate. Means are provided responsive to a scanning signal for introducing into each of the cells a respective quantity of charge prop...
11/15/1977
4058717Surface charge signal processing apparatus
A plurality of charge storage cells, each including first and second storage regions, are provided in a semiconductor substrate. Means are provided responsive to a scanning signal for introducing into each of the first charge storage regions a respective ...
11/15/1977
4035802Method and apparatus for wind measurement
A wind measuring system utilizing a very low frequency (VLF) radio navigation system including an observation station, at least three transmitting stations for sending out the VLF signal, and a sounding device positioned in the atmosphere for receiving th...
07/12/1977
4035666Analogue shift register correlators
Semiconductor charge devices are defined to effect a serial-to-parallel conversion of analogue signal information. In one aspect of the invention, a digital signal is extracted from an analogue noise environment by a shift register correlator comprising a...
07/12/1977
4034156Apparatus for the identification of feedback tapes in a shift register generator
A shift register generator feedback tap identification system in which a received code is fed to a register which detects when the code contains all 1's at which time a bit position counter and a variable tap shift register generator are reset and a null-...
07/05/1977
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