Setting a discharge rate and a charge rate of a relaxation...

Details Setting a discharge rate and a charge rate of a relaxation... Setting a discharge rate and a charge rate of a relaxation...

2007-01-30

2011-11-15

Hjerpe, Richard (Department: 2629)

Oscillators

Solid state active element oscillator

Transistors

C345S177000, C341S033000, C178S018060

Reexamination Certificate

active

08058937

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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