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. 01, 2002
Filed:
Jun. 28, 2000
Hiroyuki Taguchi, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An input buffer having a differential amplifier includes a protection circuit located between an input terminal and the differential amplifier. The protection circuit serves to protect a MOS transistor constituting the differential amplifier when a high voltage is applied to the input terminal of the input buffer. The protection circuit is an N-channel type MOS transistor with a drain electrode connected to the input terminal, a source electrode connected to a gate terminal of the MOS transistor constituting the differential amplifier and a gate terminal supplied with a power source voltage Vcc. In this configuration, the input buffer prevents occurrence of an unnecessary through current.