Peak voltage detector with ferroelectric element

Details Peak voltage detector with ferroelectric element Peak voltage detector with ferroelectric element

1992-10-02

1994-07-26

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324 72, 324457, 365191, 365145, G01R 104

Patent

active

053329627

ABSTRACT:
A peak voltage detector to measure the peak output voltage of light sensors, heat sensors and the like without the need for a reference voltage. In a ferroelectric element, the ferroelectric body is positioned between PT electrodes. The ferroelectric body has a thickness that progressively varies from one end to the other. A D.C. voltage dependent upon the direct current power supply is applied to generate a maximum spontaneous polarization Pr. The output voltage from light sensors, heat sensors and the like is of a reverse polarity with respect to that of the power supply. The output voltage is applied to the ferroelectric element. Depending on this external voltage, reverse polarization will be generated in either one part, certain parts, or all of the ferroelectric element. By measuring this reverse polarization with the polarization measuring circuit, the peak value of the external voltage is measured.

REFERENCES:
patent: 4106107 (1978-08-01), Goodman
patent: 5055897 (1991-10-01), Canepa et al.
patent: 5151877 (1992-09-01), Brennen

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