Setting a discharge rate and a charge rate of a relaxation oscillator circuit
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United States of America Patent
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Nov 15, 2011
Grant Date -
Jul 31, 2008
app pub date -
Jan 30, 2007
filing date -
Jan 30, 2007
priority date (Note) -
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Abstract
An apparatus and method for setting a ratio of a discharge rate to a charge rate for measuring a capacitance on a sensor element of a sensing device. The apparatus may include a sensor element of a sensing device, a relaxation oscillator having a first and a second programmable current source, and a ratio decoder to receive a ratio of a discharge rate to a charge rate, and to set the first and second programmable current sources based on the received ratio.
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