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. 18, 1988
Filed:
Jul. 18, 1986
Fujitsu Limited, Kawasaki, JP;
Abstract
In a master-slave type flip-flop circuit including a normal function in a normal mode for flip/flop operation and a scanning function in a scanning mode for testing an integrated circuit, the master-slave type flip-flop circuit comprises: a master stage having a first pair of differential transistors for taking in data, a second pair of differential transistors for latching data taken in to the first pair of differential transistors, a third pair of differential transistors for taking in scanning data, and a fourth pair of differential transistors for activating the second and third pair of differential transistors in the scanning mode; and a slave stage having a first pair of differential transistors for taking in data from the master stage, a second pair of differential transistors for latching data taken in to the first pair of differential transistors, a third pair of differential transistors for latching scanning data, and a fourth pair of differential transistors for activating the first and third pair of differential transistors in the scanning mode.