Circuit for detecting leakage voltage of MOS capacitor

Details Circuit for detecting leakage voltage of MOS capacitor Circuit for detecting leakage voltage of MOS capacitor

1996-12-26

1998-10-06

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 50, 327530, 327 94, 365222, G11C 700

Patent

active

058182683

ABSTRACT:
A circuit for detecting leakage voltage of a MOS capacitor, the detecting circuit including a timing control signal generator for generating a timing control signal; a sample/hold circuit for sampling and holding a first voltage, the sample/hold circuit comprising a switching circuit switched by an output of the timing control signal generator and being operatively coupled to a MOS capacitor; a monitoring capacitor for monitoring a leakage voltage of the MOS capacitor operatively coupled to the sample/hold circuit; a monitoring capacitor precharge circuit for holding a second voltage in the monitoring capacitor; and a leakage voltage detecting portion for detecting when a leakage voltage of the monitoring capacitor is below a predetermined value. The leakage voltage detecting portion is also capable of detecting what value the leakage voltage of the monitoring capacitor is, for example, when the leakage voltage is below the predetermined value.

REFERENCES:
patent: 4682306 (1987-07-01), Sakurai et al.
patent: 5117426 (1992-05-01), McAdams

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