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:
Oct. 07, 2003
Filed:
Mar. 27, 2001
Masahiko Tsuchiya, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A differential amplifier comprises first and second differential amplifier circuits. The first differential amplifier circuit includes a first N-type transistor and a second N-type transistor for constituting a differential pair, and operates based on a first input voltage V . The second differential amplifier circuit includes a first P-type transistor and a second P-type transistor making up a differential pair, and operates based on a second input voltage V . There is also provided a third P-type transistor operable based on a first signal S coming from the first differential amplifier circuit and a third N-type transistor operable based on a second signal S from the second differential amplifier circuit, wherein a voltage between these third P- and N-type transistors becomes an output voltage V .