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7277540 |
Arithmetic method and apparatus and crypto processing apparatus for performing multiple types of cryptography
An arithmetic apparatus for performing a long product-sum operation includes an integer unit arithmetic circuit, a finite field GF(2^m) based unit arithmetic circuit logically adjacent to the...
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7240204 |
Scalable and unified multiplication methods and apparatus
Scalable and unified multipliers for multiplication of cryptographic parameters represented as elements of either of the prime field (GF(p)) and the binary extension field (GF(2m)) include...
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6636828 |
Symbolic calculation system, symbolic calculation method and parallel circuit simulation system
The coefficient matrix, corresponding to the simultaneous linear equations to be solved, is divided into a plurality of row sets. The row sets as divided are processed in a parallel fashion, and...
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6424925 |
Circuit and method for detecting a tone signal
A tone detector includes at least one circuit (hereinafter “single phase reference matcher”) that not only performs a convolution of an input signal with a reference signal, but also compares the...
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6366944 |
Method and apparatus for performing signed/unsigned multiplication
An apparatus for performing signed and unsigned multiplication is presented comprising a computation cell to generate a plurality of product terms, a compressor, coupled to the computation cell,...
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6278724 |
Receiver in a spread spectrum communication system having low power analog multipliers and adders
A signal reception apparatus in the spread spectrum communication system requires only a small amount of circuitry and consumes a small amount of electric power. A quadrature detector decomposes...
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6064740 |
Method and apparatus for masking modulo exponentiation calculations in an integrated circuit
Circuitry which performs modular mathematics to solve the equation C=Mk mod n and n is performed in a manner to mask the exponent k's signature from timing or power monitoring attacks. The modular...
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5952685 |
Signal processing applications of massively parallel charge domain computing devices
The present invention is embodied in a charge coupled device (CCD)/charge injection device (CID) architecture capable of performing a Fourier transform by simultaneous matrix vector multiplication...
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5907496 |
Multiplication and addition circuit
A multiplication and addition circuit multiplies each of a plurality of analog voltages by a corresponding digital multiplier and then adds up the products. First, each bit corresponding to each of...
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5841684 |
Method and apparatus for computer implemented constant multiplication with multipliers having repeated patterns including shifting of replicas and patterns having at least two digit positions with non-zero values
A method for designing a constant multiplier system comprises identifying a repeated pattern in a minimal signed digit expression of a multiplier, designing a first accumulator stage to compute the...
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5835387 |
Multiplication circuit
Multiplication is performed including accumulation at high speed by a small quantity of hardware. Analog voltage Xi corresponding to each element of the first input data string is input to...
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5757977 |
Fuzzy logic filter for reducing noise and sharpening edges of digital image signals
A filter achieving noise reduction and digital signal image edge enhancement includes two noise reduction circuits designed to enhance an image edge. The noise reduction circuits comprise both...
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5748510 |
Multiplication circuit with serially connected capacitive couplings
A multiplication circuit includes a plurality of switches which receive a common analog input voltage and a reference voltage and which alternatively output the input voltage or the reference...
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5701260 |
Multiplier using charge transfer device
A multiplier using a charge transfer device, broadly applicable to analog signal processing, digital-to-analog (D/A) conversion, or parallel image processing. The multiplier includes a charge...
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5563812 |
Filter device including analog and digital circuitry
A filter circuit switches a switching mechanism based on multipliers held in a data register DATA RGST as a digital data. Based on the output data of data register DATA RGST, a multiplication...
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5555200 |
Charge domain bit-serial multiplying digital-analog converter
A single chip adaptive filtering system including an FIR filter and circuitry for calculating updated weighting coefficients for use in associated multiplying digital-to-analog converters. The...
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5490099 |
Method of multiplying an analog value by a digital value
A method for directly multiplying an analog and a digital data without converting from analog-to-digital or digital-to-analog. An analog input voltage is provided to a plurality of switches. A...
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5448506 |
Multiplication operational circuit device
An operational circuit device for calculating a plurality of bit data includes, an input unit for inputting a plurality of bit data, a constant current source provided for each of the plurality of...
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5424965 |
Multiplication circuit for multiplying analog values
A multiplication circuit for multiplying analog values. The multiplication circuit receives a plurality of input voltages and selects one of the input voltages. The multiplication circuit also...
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5420806 |
Multiplication circuit for multiplying analog signals by digital signals
A multiplication circuit for controlling an analog input voltage by the use of a switching signal created by a digital voltage so as to either generate an analog output or to cut-off the output. A...
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5420807 |
Multiplication circuit for multiplying analog inputs by digital inputs
A multiplication circuit for multiplying an analog input by a digital input. The digital input has a plurality of bits. The circuit has a circuit input terminal for receiving the analog input and a...
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5412565 |
Electronic synapse circuit for artificial neural network
An electronic synapse circuit is disclosed for multiplying an analog weight signal value by a digital state signal value to achieve a signed product value as a current which is capable of being...
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5408422 |
Multiplication circuit capable of directly multiplying digital data with analog data
A new and unique multiplication circuit solves the problems associated with digital multiplication circuits which operate on digital operands only. The multiplication circuit according to the...
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5396447 |
Multiplier circuit and method of operation therefor
A multiplier circuit for obtaining the product of two input signals has a modulator for modulating a first input signal to produce an intermediate pulse train whose pulse density is dependent on...
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5381352 |
Circuit for multiplying an analog value by a digital value
A multiplication circuit directly multiplying an analog and a digital data without converting analog/digital or digital/analog converting. An analog input voltage is controlled by a switching...
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5361219 |
Data circuit for multiplying digital data with analog
A multiplication circuit for directly multiplying analog and digital data without converting the analog data into digital data or the digital data into analog data. The multiplication circuit...
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5321639 |
Dual-scale topology optoelectronic matrix algebraic processing system
A parallel architecture matrix algebraic processing system exhibits patterns of arrayed (i) light transmitters and (ii) light receivers that are identical, but at differing scales. Planar arrays of...
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5311454 |
Digital multiplier-accumulator
A digital multiplier accumulator for performing the sum of products operation on two or more signal groups is described. The signal groups may be digitally coded and weighted. The multiplier...
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5258934 |
Charge domain bit serial vector-matrix multiplier and method thereof
A charge domain bit serial vector matrix multiplier for real time signal processing of mixed digital/analog signals for implementing opto-electronic neural networks and other signal processing...
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5227987 |
Digital signal processor for executing multichannel processing of analog inputs and outputs
A multichannel digital signal processor includes a plurality of sets of analog-to-digital (A/D) and digital-to-analog (D/A) conversion portions. Predetermined ones of the plurality of A/D and D/A...
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5150324 |
Analog arithmetic circuit that can perform multiplication division expansion and compression by using delta sigma modulator
An analog arithmetic circuit for executing multiplications, divisions, compressions, expansions and combinations thereof. The arithmetic circuit is provided with a ΔΣ modulator comprising an A/D c...
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5089983 |
Charge domain vector-matrix product processing system
A charge domain vector-matrix product processing system. The system includes a charge coupled device tapped delay line, an array of digital parallel shift register memory devices, and a signal...
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5034905 |
Divider circuit using analog-digital converter
A circuit arrangement for dividing an input signal A by a signal B, for eple for use in localizing radiation detection, has a dividing analog-to-digital converter receiving an addition signal...
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4896284 |
Semiconductor integrated circuit for multiplying analog and digital values
A semiconductor integrated circuit so arranged that selection is made out of output signals of a decision circuit which determines the levels of analog values inputted as an object for...
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4752731 |
Electronic type electric energy meter
An electronic type electric energy meter comprising an analog adder and an analog subtracter by which signals proportional to a voltage and a current of a circuit to-be-measured are respectively...
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4752900 |
Four-quadrant multiplier using a CMOS D/A converter
A four-quadrant multiplier uses a CMOS digital-to-analog converter (DAC) and just one operational amplifier. The back gates of the CMOS switches in the DAC are biased in the "off" condition during...
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4704702 |
Systolic time-integrating acousto-optic binary processor
An optical processing system performs matrix-matrix, matrix-vector, and vector-vector multiplication. Element product formation is accomplished by the time integration of a detector array which...
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4697247 |
Method of performing matrix by matrix multiplication
The general purpose of the present invention is to provide a optimized procedure for performing matrix by matrix multiplication in a parallel architecture computer, either digital or optical, that...
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4692885 |
Optical floating-point matrix-vector multiplier
A digital multiplication by analog convolusion algorithm is extended by a brid combination of both floating and fixed-point arithmetic. An acousto-optical time-integrating architecture uses a...
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4686647 |
Numerical division of two arrays by optical processing
Apparatus for performing a division of a dividend intensity array by a divisor intensity array on a pixel-by-pixel basis, to yield a quotient intensity array, wherein optical feedback principles...
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4684922 |
Temporal averaging using a voltage mode D/A converter
A digitally programmable infinite impulse response (IIR) filter particularly useful as a temporal averager. The filter comprises a voltage mode multiplying digital/analog converter (12) and two...
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4667300 |
Computing method and apparatus
An optical computing apparatus and method for high speed multiplication of numerical array, wherein the arrays to be multiplied are arranged according to a systolic processing or engagement...
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4654815 |
Analog signal conditioning and digitizing integrated circuit
An analog signal conditioning and digitizing integrated circuit is provided having a multiplying digital to analog converter means (MDAC) including a gain capacitor array and an offset capacitor...
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4625293 |
Parallel programmable charge domain device
Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting,...
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4616334 |
Pipelined programmable charge domain device
Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting,...
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4603398 |
Matrix-matrix multiplication using an electrooptical systolic/engagement array processing architecture
A electrooptic systolic array architecture performs matrix-matrix multiplication using incoherent light. The incoherent light is collimated and passed through a polarizing beamsplitter and onto a...
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4602133 |
Adaptive echo cancelling system and method utilizing linear code spacing
An improved adaptive echo cancelling system and method is disclosed. The system and method utilizes linear code spacing and is particularly well suited for echo cancellation of full scale signals....
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4592004 |
Electrooptical matrix multiplication using the twos complement arithmetic for improved accuracy
The improved electrooptic signal processing relies upon matrix-matrix multiplication using twos complement arithmetic. A source of pulse collimated light illuminates two two-dimension spatial light...
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4584657 |
Charge transfer multiplier and filter
The signal processing apparatus includes a plurality of multiplying or charge splitting stages connected in series. A plurality of pairs of control words are provided, one word of each pair being...
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4500973 |
Electronic devices
An electronic watthour meter for connection in a two-wire power distribution circuit comprises a shunt connected in one of the wires and an electronic circuit comprising a transconductance...
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