Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Slope control of leading or trailing edge of rectangular or...
Reexamination Certificate
2008-02-05
2009-11-24
Cox, Cassandra (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Slope control of leading or trailing edge of rectangular or...
C327S134000
Reexamination Certificate
active
07622972
ABSTRACT:
A system for generating an ideal rise or fall time includes: a first current source, for providing a first current; an adjustable capacitive component, coupled to the first current source, for generating an output signal according to a total capacitance controlled by a comparison signal; a signal conversion circuit, coupled to the adjustable capacitive component, for restoring charges stored in the adjustable capacitive component to a predetermined value when a voltage level of the output signal reaches a reference value to generate a clock-like signal; and a comparison circuit, coupled to the signal conversion circuit and the adjustable capacitive component, for comparing a period of the clock-like signal with a reference period of a reference clock signal and generating the comparison signal to adjust the total capacitance of the adjustable capacitive component when periods are not the same.
REFERENCES:
patent: 5883535 (1999-03-01), Kato
patent: 5969513 (1999-10-01), Clark
patent: 2006/0164142 (2006-07-01), Stanley
Chapmen Dave Eugene
Dale Bret Roberts
Daudelin Darin James
Jurasek Ryan Andrew
Cox Cassandra
Hsu Winston
Nanya Technology Corp.
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