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:
Sep. 30, 1997
Filed:
Jun. 06, 1995
Carl W Moreland, Greensboro, NC (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A gain compensating differential reference circuit that is used to match the gain of an input differential amplifier, and track and hold circuit at the input of an analog-to-digital converter. The gain compensating differential reference circuit includes a single-to-differential converter to convert a V.sub.REF signal into a V.sub.REF+ and a V.sub.REF- signals whose difference equals the full-scale range of the differential analog input to the A/D converter, a gain matching differential amplifier to process to the differential output of the single-to-differential converter, and a gain matching track and hold circuit to process the output of the differential amplifier. The output of the gain matching track and hold circuit has the same gain and full-scale range as the analog signals processed by the input circuitry of the A/D converter along the analog path.