High speed configuration independent programmable macrocell

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5502403
SERIAL NO

08360469

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A user configurable circuit contains clock logic, a switching element and a data path circuit. Input data is received in the switching element, and the switching element and the data path circuit constitute the entire data path for the circuit. A plurality of user configurable inputs are received to configure the circuit for a particular user application. The clock logic and the switching element implement a logic function that is configurable by the user configurable inputs. The logic function is pre-processed in the clock logic so that minimal delay occurs in the data path. In addition, the propagation delay through the switching element and the register is independent of the user configurable inputs. The user configurable circuit of the present invention has application for use as a macro cell for a programmable logic device permitting the user to configure the circuit as a D-type flip-flop, a T-type flip-flop. In addition, the user selects the polarity for the output circuit.

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Patent Owner(s)

  • CYPRESS SEMICONDUCTOR CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ansel, George M Starkville, MS 20 259
Douglass, Stephen M Saratoga, CA 23 656
Hunt, Jeffery S Ackerman, MS 5 83
Liu, Lin-Shih Fremont, CA 26 279
Nazarian, Hagop San Jose, CA 117 1721
Raza, Syed B Sunnyvale, CA 2 50

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