Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1998-04-17
2000-08-22
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327287, 327404, H03H 1126
Patent
active
061078549
ABSTRACT:
A speed path circuit includes a reference circuit and adjustable drive components that can be turned on or off to vary the speed path in order to meet minimum delay specification for the circuit. In an embodiment, one or more differential amplifiers are used to detect the strength of example circuit elements and generate a reference signal. An optional embodiment includes a mechanism for disconnecting the reference circuit to avoid any DC current drain. The invention may be used in a wide range of integrated circuits and may also be used in a programmable logic device (PLD). Reference circuits may be disconnected from a power source by using programmable logic elements.
REFERENCES:
patent: 5260611 (1993-11-01), Cliff et al.
patent: 5453709 (1995-09-01), Tanimoto et al.
patent: 5589785 (1996-12-01), Garavan
patent: 5668488 (1997-09-01), Sharpe-Geisler et al.
Patel Rakesh H
Turner John E.
White Thomas H.
Wong Wilson
Altera Corporation
Callahan Timothy P.
Nguyen Minh
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