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:
Feb. 10, 2004
Filed:
Jun. 26, 2002
Applicant:
Inventor:
Masanori Koizumi, Suwa, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/700 ;
U.S. Cl.
CPC ...
H03K 1/700 ;
Abstract
A chopper type comparator is equipped with an input switching circuit that switches between an input voltage V and a reference voltage V , a capacitor C , and an amplification circuit that is formed from amplifiers (CMOS inverters) . The input switching circuit is provided with a switch CT that turns on and off the input voltage V , and a switch CT that turns on and off the reference voltage V . Rising and falling of control signals to the P channel and N channel transistors of the switches CT and CT are simultaneously conducted, and an intersection of the rising and falling sections thereof coincide with a center of the amplitude of the drive signals.