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. 29, 1991
Filed:
Mar. 27, 1990
Koji Katsuragi, Hirakata, JP;
Yoshiaki Yanagida, Hirakata, JP;
Soichi Matsuyama, Kyoto, JP;
Yoshihisa Ikuta, Toyonaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
A semiconductor integrated circuit constructed on a single chip. Either one of a signal inputted to a clock signal input terminal and a signal obtained by dividing the frequency of the clock signal inputted to the clock signal input terminal is selected by a selecting circuit responsive to a selection signal supplied from the exterior of the chip to be supplied to a control circuit. Consequently, the frequency dividing circuit can be bypassed in response to the selecting circuit. Accordingly, it is possible to easily provide operation at a high frequency exceeding the maximum operating frequency of component devices forming the semiconductor integrated circuit. This can be done by connecting an external circuit having the same function as that of the circuit bypassed and capable of higher-speed operation.