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:
Dec. 06, 1994
Filed:
Jul. 16, 1993
Isao Ihara, Takatsuki, JP;
Yoshiaki Sone, Setsu, JP;
Shinichi Tashiro, Osaka, JP;
Takeshi Fujita, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A counter circuit includes counting stages of n bits where n is a natural number. The counter circuit also includes a logic decoding circuit for determining the inputs of the counting stages, a logic circuit for adjusting the number of simultaneous changes so that the number of simultaneous changes of the logic decoding circuit can be made uniform, and a logic circuit for adjusting the load capacitance of the counting stages so that the load capacitance can be made uniform. The counter circuit may also include a test logic circuit for creating a test wave form on the basis of the outputs from the logic circuits for adjusting the number of simultaneous changes and the logic circuits for adjusting the load capacitance. Accordingly, it is possible to detect a failure of the logic circuits for adjusting the number of simultaneous changes and the logic circuits for adjusting the load capacitance which does not effect the counting output.