Oscillators – Relaxation oscillators – Output supplied to another discharge device circuit
Reexamination Certificate
2007-12-11
2007-12-11
Lee, Benny T. (Department: 2817)
Oscillators
Relaxation oscillators
Output supplied to another discharge device circuit
C324S548000, C324S658000, C324S678000
Reexamination Certificate
active
11273708
ABSTRACT:
An apparatus that may be used to sense capacitance, as well as other functions. The apparatus includes a comparator circuit with hysteresis, a capacitor, and a current driver. The comparator circuit with hysteresis includes a first input and an output. The capacitor is coupled to the first input of the comparator circuit with hysteresis. The current driver is coupled to the output of the comparator circuit with hysteresis and to the capacitor. The current driver reciprocally sources and sinks a drive current through a terminal of the capacitor to oscillate a voltage potential at the terminal of the capacitor between a low reference potential and a high reference potential. The current driver is responsive to the output of the comparator circuit with hysteresis.
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Sedra, Adel S. et a
Ess David Van
Snyder Warren S.
Cypress Semiconductor Corporation
Gannon Levi
Lee Benny T.
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