Timothy George Nash

US Patent:

20050134323, Jun 23, 2005

Filed:

Dec 23, 2003

Appl. No.:

10/745124

Inventors:

Timothy Nash - Riverview FL, US

International Classification:

H03D013/00

US Classification:

327040000

Abstract:

A R-C low pass filter is used in series with a Schmitt-trigger to form a mask for single event transients (SETs) in a comparator. Transients are masked to logic devices attached to an output of the comparator. A mask time is determined in part by the time constant of the R-C filter, and in part by hysteresis trip points of the Schmitt-trigger input. An inverter provides a stable logic level edge rate, which may have been affected by the R-C filter. In a further embodiment, a reverse biased diode is positioned to bypass the filter when the comparator output is low.