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. 12, 2010
Filed:
May. 25, 2007
Peter Wohl, Williston, VT (US);
John A. Waicukauski, Tualatin, OR (US);
Sanjay Ramnath, San Jose, CA (US);
Rohit Kapur, Cupertino, CA (US);
Thomas W. Williams, Boulder, CO (US);
Peter Wohl, Williston, VT (US);
John A. Waicukauski, Tualatin, OR (US);
Sanjay Ramnath, San Jose, CA (US);
Rohit Kapur, Cupertino, CA (US);
Thomas W. Williams, Boulder, CO (US);
Synopsys, Inc., Mountain View, CA (US);
Abstract
A scan-based circuit includes a selector that is implemented by multiple observation logics. Each observation logic is coupled to a scan chain to receive data to be supplied to a combinational compressor. Each observation logic is also coupled to a single input line in a corresponding group of input lines of the combinational compressor, to selectively supply data from the coupled scan chain. Each observation logic may be coupled to additional input lines (if present) in the corresponding group. The selector is operable on a per-shift basis in (a) transparent mode wherein data is supplied to all input lines and (b) several direct modes wherein data from only one scan chain is supplied at each compressor output without overlap.