Title: Four quadrant analog by digital multiplier

Abstract: A four quadrant analog by digital multiplier includes an amplifier gain network in which the digital sign bit controls the polarity of the gain of an amplifier to determine the product of the digital sign and the analog value, and in which the digital magnitude bits control a multiple of resistor steps of a resistance network to determine the product of the digital magnitude and analog value as previously multiplied by the digital sign bit in the amplifier gain network.

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Inventors: Mattern, John (Catonsville, MD, US)

Application Number: 637549
Filing Date: 1975-12-04
Publication_date: 1977-04-12
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 708/103 341/127, 341/133, 341/153
Other Classes:
US Patent Ref:

2966302	Dec, 1960	Woolf et al.	235/150.
3309508	Mar, 1967	Witt	235/150.
3469080	Sep, 1969	Schmid et al.	235/150.
3484589	Dec, 1969	Jernakoff	235/150.
3633005	Jan, 1972	Leighton	235/150.
3683165	Aug, 1972	Grobert et al.	235/150.

Other Refs:
Primary Examiner: Ruggiero, Joseph F.
Assistant Examiner:
Attorney: Brodahl; R. G.