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. 15, 2011
Filed:
Sep. 22, 2009
John F. Ewen, Rochester, MN (US);
John F. Ewen, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An analog error amplifier includes an amplifier circuit and a replica bias circuit that together produce an output signal representing a difference between an input signal and a reference signal. The amplifier circuit produces the output signal in response to the input signal and a bias signal provided by the replica bias circuit. The bias signal may establish a reference threshold of a basic amplifier in the amplifier circuit. The replica bias circuit produces the bias signal in response to the reference signal and drives the bias signal to be equal to the reference signal. The replica bias circuit may include a plurality of amplifier stages. The bias signal produced by a single replica bias circuit may be provided to a plurality of amplifier circuits to provide a plurality of error amplifiers for a single reference signal.