The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1976
Filed:
Sep. 12, 1974
Larry R Hite, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A four quadrant multiplier in which a semiconductor chip has a pair of MOSFET differential amplifiers formed with MOSFET current sources for both amplifiers. Currents through the differential amplifiers are modulated 180.degree. out of phase in response to first multiplier input voltages. Currents through one FET of each said amplifier and a second FET of each said amplifier are modulated in response to second multiplier input voltages 180.degree. out of phase. Active MOSFETs form a load connected to the drains of the first FET of both amplifiers while other active MOSFETs form a load connected to the drain of the second FET of both amplifiers to produce a product voltage across at least one of the load FETs.