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:
May. 22, 2012
Filed:
Apr. 14, 2010
Shigeki Mabuchi, Tama, JP;
Atsushi Watanabe, Tama, JP;
Makoto Seino, Tama, JP;
Nagayoshi Dobashi, Tama, JP;
Shigeki Mabuchi, Tama, JP;
Atsushi Watanabe, Tama, JP;
Makoto Seino, Tama, JP;
Nagayoshi Dobashi, Tama, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
An image signal input circuit includes an input terminal configured to receive an image signal, a clamp circuit configured to hold a sink chip voltage contained in the image signal to be a constant value, a level shift circuit that includes a first emitter follower having a first transistor and a first current source, and a second emitter follower having a second transistor and a second current source, a base of the second transistor being connected to an emitter of the first transistor, and that is configured to shift a level of the sink chip voltage which is held constant, and an electric current source configured to attract a base current of the first transistor.