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:
Apr. 12, 1994
Filed:
Apr. 01, 1992
James R Hellums, Plano, TX (US);
Henry T Yung, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A CMOS on chip mid-rail voltage generation circuit is provided for an analog ground reference. A voltage divider establishes a current path between the high and low rail, and supplies a mid-level voltage to one input of a differential amplifier. A pair of series connected field effect transistors are also connected between the high and low voltage rails, with their common connection providing the input to the other input of the differential amplifier. A pair of open loop output transistors are also coupled in series between the high and low voltage rails, and each has their gate coupled to one of the series connected pair, and is also matched to that pair.