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. 12, 2009
Filed:
Mar. 02, 2007
Maziar Tavakoli Dastjerdi, Waltham, MA (US);
Kristiaan B. Lokere, Westford, MA (US);
Maziar Tavakoli Dastjerdi, Waltham, MA (US);
Kristiaan B. Lokere, Westford, MA (US);
Linear Technology Corporation, Milpitas, CA (US);
Abstract
A differential amplifier with a rail-to-rail input stage includes a feedback circuit that maintains the output common mode voltage of the amplifier within a narrow range of an externally supplied value. To reduce harmonic distortions and to further stabilize the output common mode voltage of the amplifier, current is controllably drawn from a biasing circuit coupled to an intermediate stage of the amplifier. Optionally, to reduce harmonic distortions and to further stabilize the output common mode voltage of the amplifier, current is controllably supplied to the intermediate stage of the amplifier.