Richard J Wiley

US Patent:

57969850, Aug 18, 1998

Filed:

Apr 29, 1996

Appl. No.:

8/639393

Inventors:

Peter R. O'Brien - Austin TX
Richard Paul Wiley - Round Rock TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G06F 1750

US Classification:

395500

Abstract:

A data processing system which calculates timing delays in a circuit having a switching device (3). A computer processor (22) receives input describing a circuit and calculates the timing delays for each switching device (3) or stage. To perform each calculation the computer processor (22) models the circuit incorporating effective resistance R. sub. eff (24), Miller capacitance C. sub. mu. (7), and an associated Miller coefficient. The Miller coefficient is a defined by the behaviour of the model. The model is then reduced to a set of equations, the variables are determined, and the timing delay calculated. In one embodiment, successive stages are calculated to locate timing violations in circuit design. In alternate embodiments, models such as CRYSTAL (4) or the Sakurai model are enhanced by Miller capacitance considerations, however many other models may be used.

Address:

8403A Cima Oak Ln, Austin, TX 78759

VIN:

2B3KA43GX7H669972

Make:

DODGE

Model:

CHARGER

Year:

2007