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. 16, 1999
Filed:
Mar. 23, 1998
Katsuji Kaminishi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A peak hold circuit includes an error amplification circuit having a first transistor section receiving an input voltage and a second transistor section constituting a differential error amplifier together with the first transistor section. The second transistor section has a plurality of transistors connected in parallel so as to operate individually. The peak hold circuit also includes a switching circuit having a plurality of switching transistors operated in accordance with an operation voltage of each of the transistors of the second transistor section, a charging circuit including a capacitor, for charging the capacitor stage by stage in accordance with a switching operation of each of the switching transistors of the switching circuit, and an output circuit for outputting a charging potential of the capacitor as a peak value signal of the input voltage.