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:
Jan. 26, 2010
Filed:
Nov. 02, 2008
Chia-hung Lin, Hsinchu, TW;
Jr-ching Lin, Kao-Hsiung, TW;
Yung-cheng Lin, Hsinshu County, TW;
Tsung-hau Chang, Hsinchu, TW;
Chia-Hung Lin, Hsinchu, TW;
Jr-Ching Lin, Kao-Hsiung, TW;
Yung-Cheng Lin, Hsinshu County, TW;
Tsung-Hau Chang, Hsinchu, TW;
NOVATEK Microelectronics Corp., Hsinchu Science Park, Hsin-Chu, TW;
Abstract
A rail-to-rail operational amplifier capable of reducing current consumption includes an amplification stage circuit including a first compensation output terminal and a second compensation output terminal, for generating an amplified signal according to an input signal, an output stage circuit coupled to the amplification stage circuit, for outputting the amplified signal, and a compensation circuit coupled to the amplification stage circuit and the output stage circuit. The compensation circuit includes a first voltage generator for generating a first voltage, a second voltage generator for generating a second voltage, a first compensation capacitor, a second compensation capacitor, and four switches named from a first switch to a fourth switch, wherein the first voltage is approximately a steady state voltage of the first compensation output terminal and the second voltage is approximately a steady state voltage of the second compensation output terminal.