Dose rate event protection clamping circuit

Details Dose rate event protection clamping circuit Dose rate event protection clamping circuit

2005-07-20

2008-12-16

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S309000

Reexamination Certificate

active

07466181

ABSTRACT:
A novel system for protecting one or more circuits during a dose rate event is presented. A clamping circuit is utilized that outputs a voltage signal that may be used to control prevent circuits from receiving input signals during a dose rate event. The clamping circuit comprises a photocurrent generating device that creates a current as a function of dose rate event strength. This current is used to control a grounding switch, which pulls the clamping circuit output to ground when a substantial current is created by the photocurrent generating device. The clamping circuit output may control a coupling switch that permits external input signal current flow when the clamping circuit output is above a threshold voltage level, and may prevent current flow when the output is grounded. The photocurrent generating device may be a PMOS device, while the coupling switch and clamping switch may be realized by NMOS devices.

REFERENCES:
patent: 5705940 (1998-01-01), Newman et al.
patent: 7286393 (2007-10-01), Hynes et al.

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