Charge signal converting amplifier

Details Charge signal converting amplifier Charge signal converting amplifier

2006-11-28

2006-11-28

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C330S009000

Reexamination Certificate

active

07142034

ABSTRACT:
Positive charges of a sensor element are stored in a capacitor for converting a voltage, are converted into a positive voltage by an amplifier, and then are outputted. When the polarity of the charges of the sensor element are inverted to be negative, the charges inversely flow from the capacitor for converting the voltage and feed back to an equivalent capacitor of the sensor element. The output of the amplifier reduces and returns to a zero-point. An automatic correcting circuit makes an FET conductive and the charges are discharged in order to prevent the fluctuation of the zero-point level due to the negative drift.

REFERENCES:
patent: 4596956 (1986-06-01), Gardner
patent: 4760345 (1988-07-01), Busser et al.
patent: 4806875 (1989-02-01), Schaffer
patent: 5563587 (1996-10-01), Harjani
patent: 6426663 (2002-07-01), Manlove et al.
patent: 6952130 (2005-10-01), Kuyel et al.
patent: 3123798 (1993-07-01), None

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