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:
Feb. 09, 1999
Filed:
Apr. 17, 1996
Patrick H Mawet, Snohomish, WA (US);
Mitutoyo Corporation, Kawasaki, JP;
Abstract
A fast, open-loop amplifier for an electronic measuring system is formed by a folded, differential, open-loop amplifier. This amplifier includes a differential common-source portion, a current mirror portion and a load portion. The current mirror portion is connected between the differential common-source portion and the load portion. The load portion is connected to a common voltage supply portion. The fast, open-loop amplifier can include multiple stages, where each stage includes the folded, differential, open-loop amplifier. In this case, each stage can have its own common voltage supply portion. Alternatively, a single common voltage supply portion can be shared between the stages. All the transistors of the differential common source portion and the load portion have the same type of doping, while all the transistors of the current mirror are the same type of doping, but of a type which is different than that used in the differential common source amplifier portion and the load portion.