NASA Office of Logic Design

NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.


Mercury Laser Altimeter
Detector Card (Engineering Model)


detector_top.jpg (140693 bytes) detector_bottom.jpg (147446 bytes) Post-Coat and Stake
February 12, 2003


Mass ~51 g
+5 VDC: 138 mA
-5 VDC: 92 mA
550 VDC: 18.3uA
Functions Detector variable gain post-amplification; 3 filter channels: 10ns FWHM, 60ns FWHM, 270ns FWHM; threshold discriminator with LVDS output for each channel--HI and LO threshold channels for the 10ns filter.
Performance Gain: variable from 0.1 to 10. Sensitivity: 378KV/W. NEP: .036pW/rt-Hz.
Design/Analysis Team Jerry Karsh, Xiaoli Sun
PCB Layout Banks Walker
Quality Assurance

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Last Revised: February 03, 2010
Digital Engineering Institute
Web Grunt: Richard Katz