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:
Dec. 25, 1984
Filed:
Jul. 02, 1982
John Dimeff, San Jose, CA (US);
Mark Telephone Products, Inc., Sunnyvale, CA (US);
Abstract
A differential amplifier suitable for use with a transducer network, such as a Wheatstone bridge, for measuring small signal voltages while eliminating common mode voltage contributions applied to the input of the amplifier. A potentiometer is connected across the output terminals of a pair of amplifiers whose positive input terminals receive the common mode voltage components and induced signal voltages from the transducer network. The shiftable terminal of the potentiometer is connected to the negative input terminals of one of the two amplifiers and adjusted to control the gain of the amplifier pair. The output signals of the differential amplifier are proportional to the induced signal voltages and devoid of the common mode voltage.