Tuan M Phan

US Patent:

7286333, Oct 23, 2007

Filed:

Oct 28, 2004

Appl. No.:

10/975858

Inventors:

Ronald A. Kubinski - Mission Viejo CA, US
Tuan T. Phan - Arcadia CA, US
Gregory H. Smith - Placentia CA, US
Huan N. Nguyen - Garden Grove CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01V 1/06

US Classification:

361247

Abstract:

Switch card apparatus are disclosed. In one embodiment, a circuit includes a first portion having a first switch adapted to be coupled to a first voltage, a second portion including a second switch, and a third portion including a third switch. The first portion activates the first switch to couple the first voltage to the second portion. Similarly, the second portion activates the second switch in response to a second input signal and the first voltage to couple a second voltage to the third portion. Finally, the third portion activates the third switch in response to a third input signal and in response to the second voltage from the second portion to couple a control voltage to a load. Embodiments of the invention provide the desired reliability suitable for a variety of electrical systems, including arming and firing applications over a wide voltage and wide current range.