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:
Apr. 05, 1994
Filed:
Feb. 04, 1993
Masahiko Sayama, Himeji, JP;
Toshiro Hara, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Each channel of an input interface circuit for suppressing noise contained in input signals to a CPU (microcomputer) of an automobile includes: a level determining circuit for shaping the waveform; a clock circuit for generating sampling clock pulses; a sequential memory circuit, clocked by the clock pulses, for sampling the output levels of the level determining circuit and storing at least two successive output levels; and a resetting circuit which is set when all the levels stored in the sequential memory circuit are high, and which is reset when all the levels stored in the sequential memory circuit are low. The noise pulses contained in the output of level determining circuit are thus effectively removed.