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:
Nov. 12, 1991
Filed:
Aug. 01, 1990
Applicant:
Inventors:
Joseph A Thomsen, Chandler, AZ (US);
Richard W Ulmer, Tempe, AZ (US);
Assignee:
VLSI Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307269 ; 307471 ; 328110 ; 377111 ; 377114 ;
Abstract
A self-configuring clock interface circuit automatically configures itself according to the type of clock input signals applied to two input terminals interconnected with the interface circuit. The system includes a pair of counters connected to the input terminals and having their outputs connected to the two inputs of an Exclusive NOR gate which acts as a control device for the system. The output of the exclusive NOR gate is coupled to a 2:1 multiplex to control the interconnection of one or the other of two inputs to the multiplex circuit with a clock output for the interface circuit.