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.

Date of Patent:
May. 23, 2017

Filed:

Mar. 21, 2014
Applicant:

Altera Corporation, San Jose, CA (US);

Inventors:

Nima Safari, High Wycombe, GB;

Volker Mauer, Princes Risborough, GB;

Shahin Gheitanchi, Maidenhead, GB;

Assignee:

Altera Corporation, San Jose, CA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/10 (2006.01); H03K 5/14 (2014.01);
U.S. Cl.
CPC ...
H03K 5/14 (2013.01);
Abstract

Circuitry that efficiently implements loop functions in an integrated circuit is provided. The circuitry combines a feed-forward circuit with a feedback loop that includes a unit delay element in a feedback path. The feedback path may couple the output of a processing element to the input of the processing element. The processing element may implement a function that satisfies commutative, associative, and distributive properties. Combining the feedback loop with the feed-forward circuit may allow for register retiming in the feedback loop and for register pipelining with optional register retiming in the feed-forward circuit. The circuitry may thus trade off an increase in throughput and clock frequency for additional resources.


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