Abstract: A system and method for providing a static mode for logic circuits with dynamic latches. The invention provides a reliable static mode for testing of the logic circuit, prevents "through current" power consumption when docks to the logic circuit are stopped, and allows the circuit to be powered down when idle. The system includes a circuit for forcing clock phases to an active state, a circuit for breaking feedback paths within the logic circuit, and an optional clock loss detector for detecting clock inactivity and automatically initiating the static mode.
Type:
Grant
Filed:
November 29, 1999
Date of Patent:
December 19, 2000
Assignee:
Graychip, Inc.
Inventors:
Gary John Bazuin, Joseph Harold Gray, Lars Morten Jorgensen
Abstract: A system and method for providing a static mode for logic circuits with dynamic latches. The invention provides a reliable static mode for testing of the logic circuit, prevents "through current" power consumption when clocks to the logic circuit are stopped, and allows the circuit to be powered down when idle. The system includes a circuit for forcing clock phases to an active state, a circuit for breaking feedback paths within the logic circuit, and an optional clock loss detector for detecting clock inactivity and automatically initiating the static mode.
Type:
Grant
Filed:
April 6, 1998
Date of Patent:
June 20, 2000
Assignee:
Graychip, Inc.
Inventors:
Gary John Bazuin, Joseph Harold Gray, Lars Morten Jorgensen
Abstract: A signal processing system and method for stabilizing cascaded integrator-comb (CIC) interpolation filters. The signal processing system includes an overflow detection circuit and reset circuitry. The overflow detection circuit monitors the output of the CIC interpolation filter for an overflow condition which is indicative of filter instability. When an overflow condition is detected, the reset circuitry automatically resets the filter, thereby eliminating the instability.
Type:
Grant
Filed:
November 20, 1996
Date of Patent:
March 9, 1999
Assignee:
Graychip Inc.
Inventors:
Joseph Harold Gray, Lars Morten Jorgensen