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:
Aug. 02, 2016
Filed:
Nov. 07, 2014
Applicant:
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Assignee:
LATTICE SEMICONDUCTOR CORPORATION, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/26 (2006.01); H03F 1/02 (2006.01); H03F 3/21 (2006.01); H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0205 (2013.01); H03F 3/21 (2013.01); H03F 3/26 (2013.01); H03F 3/45076 (2013.01); H03F 2200/129 (2013.01); H03F 2203/45332 (2013.01);
Abstract
A Class AB amplifier has a control stage and a push-pull stage. The control stage has a programmable resistor that allows a floating constant voltage to applied to the push-pull stage such that the quiescent current of the amplifier is relatively low. The configuration enables the amplifier to operate properly at relatively low power-supply voltage levels. The amplifier can be configured as the output driver for an operational amplifier (op-amp) with a Miller compensation configuration that replaces the conventional Miller compensation resistor with a transistor that is part of the op-amp.