USA As Represented by Secretary of the Navy

Westinghouse Electric Corporation

Ingham A Mack

Francis J Kub

Marvin H White

Donald R Lampe

John Bradley Boos

Nicolas A Papanicolaou

Harry B Dietrich

Gordon W Anderson

Keith K Moon

David I Ma

An improved programmable analog voltage multiplier circuit means (PAVMCM) cluding various embodiments thereof that are operable in linear/nonlinear fashion. The PAVMCM is generally made up of multiplier circuit means, at least one switch means and at least one capacitor means. The switch means is connected to a programmable analog voltage (PAV) input and the capacitor means. The circuit means is composed of a high impedance analog voltage (HIAV) programming input, an analog voltage input and current source output means. The capacitor means is connected to the switch means and the HIAV programming input. The capacitor means receives and dynamically stores a PAV input when the switch is closed and then applies the dynamically stored PAV input to the HIAV programming input of the circuit means when the switch is opened. The product of the PAV input and the analog voltage input for a circuit means provides the multiplied current output of the output means thereof. Because of the high impedance of a FET gate means, it may be used where its gate means is the programming input of the PAVMCM means. PAVMCM means can be formed using FET multiplier and differential amplifier multiplier circuit means. The PAVMCM can be arranged to form embodiments of analog vector-vector and analog vector-matrix multiplier circuit means. One of the advantages of the PAVMCM when configured as a vector-matrix multiplier circuit means is that it is useful in an artificial neural network as well as for pattern recognition.

Programmable analog voltage multiplier circuit means

An integrated, planar, single-channel, photodetector-amplifier device is disclosed. The single-channel device includes a photodetector layer and an amplifier layer above the photodetector layer. The photodetector layer is low-doped to give a low dark current and is sufficiently thick to give a high quantum efficiency. The amplifier layer is of a smaller thickness and is a more highly doped material than the photodetector layer, to provide an amplifier having high gain. An insulating layer is included between the photodetector and amplifier layers for electrically isolating the photodetector and amplifier layers. The layers are fabricated on a substrate. Isolation regions are also included for electrically laterally isolating a photodetector, amplifier, and other circuit components comprising the single channel device from each other. An integrated multi-channel photodetector-amplifier array is also disclosed which array comprises a plurality of single-channel photodetector-amplifier devices fabricated on the same substrate with isolation regions created by proton bombardment to electrically laterally isolate the individual circuit channels from each other. The photodetector-amplifier array may be a linear or an area array.

Monolithic multichannel detector amplifier arrays and circuit channels

An adaptive analog processor incorporating a analog shift register having a plurality of taps, multipliers at each tap for multiplying the tap value times a weight value, a first adder for summing the output of the multipliers, a second adder for subtracting the output of the adder from a second analog signal, means for incrementing the weights in response to the magnitude and polarity of the error signal and the polarity of the data signal. The invention overcomes the problem of building monolithic multitap adaptive filters utilizing the clipped-data least mean square error algorithm.

Adaptive analog processor

A charge control circuit for bidirectionally transferring metered amounts of charge, selectively, through a transfer channel of a four gate electrode charge coupled device (CCD) is disclosed. The bidirectional charge control circuit is used primarily to increment and decrement metered amounts of charge respectively to and from a charge storage medium. More specifically, five electrical signals are generated to have varying potentials in accordance with predetermined time sequences. These signals are applied to the four gate electrode CCD in a selected one of two states to either increment or decrement a metered amount of charge therethrough to or from the charge storage medium respectively, in a predetermined number of five segments. One of the generated signals governs the metering of charge for each increment or decrement operation.

Bidirectional charge control circuit

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Laurel, MD, United States of America

Ingham A Mack