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. 11, 2010
Filed:
Mar. 21, 2008
Hyunjoong Lee, Seoul, KR;
Young Sik Kim, Seoul, KR;
Suhwan Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
An operational amplifier including an input amplifier configured to amplify at least one differential input signal, a first common mode feedback amplifier configured to amplify a first common mode voltage, a cascode amplifier configured to cascode-amplify output signals from the input amplifier and the first common mode feedback amplifier, a first common mode voltage generator configured to generate a central voltage of the output signal from the cascode amplifier and input the central voltage to the first common mode feedback amplifier, and a frequency compensator configured to feedback the output signal of the cascode amplifier to the first common mode feedback amplifier so as to compensate a frequency of the first common mode feedback amplifier.