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:
Aug. 12, 2003
Filed:
Jan. 30, 2002
Tsuneo Tsukagoshi, Tokyo, JP;
Shuichi Nitta, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A power supply noise sensor includes a noise sensing section A to sense impulse noise applied to a power supply line and an output holding section B to hold a sense output from the noise sensing section A. The noise sensing section A includes a time constant circuit to gradually vary a power supply voltage including impulse noise. When a peak value of the impulse noise reduces after the peak value exceeds a predetermined value, a direction of a current flowing through the time constant circuit is inverted to hold a noise output from the output holding section B also after the impulse noise disappears. Therefore, the impulse noise in the forward direction and the impulse noise in the reverse direction superimposed onto the power supply system of the sensor can be sensed in a simple configuration.