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:
Nov. 02, 2004
Filed:
Mar. 27, 2001
Masahiko Tsuchiya, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A first differential amplifier circuit includes a first P-type transistor and a second P-type transistor which constitute a current mirror circuit, and operates based on an input voltage V . A second differential amplifier circuit includes a first N-type transistor and a second N-type transistor forming a current mirror circuit and operates based on the common input voltage V . A third P-type transistor operable based on a first signal S from the first differential amplifier and a third N-type transistor operable based on a second signal S from the second differential amplifier are provided. A voltage between these third P-type and third N-type transistors becomes an output voltage V . The first differential amplifier circuit has a fourth N-type transistor that is connected in series to the first P-type transistor and a fourth N-type transistor connected in series to the second P-type transistor, wherein a driving ability difference is provided between a pair of transistors forming a first differential pair.