1. Low power ADC with fast zero suppression for balloon-borne experiment
- Author
-
Kazuaki, Anraku, Susumu, Inaba, and Masatosi, Imori
- Subjects
Electric current converters -- Research ,Detectors -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
The article describes a low power CAMAC ADC module with fast zero suppression. The module is developed to improve data acquisition rate for a balloon-borne detector. The module is of a single CAMAC width and includes sixteen charge-to-voltage converter (QVC) channels. Each channel has its own A/D converter. The QVC outputs are digitized simultaneously. The A/D converter continues digitization for 15 |micro~sec at longest. Then a micro-programmed sequencer, which is installed in the module, scans the channels, comparing the outputs of the A/D converters with prescribed thresholds. The outputs are stored together with channel numbers into data memory when the outputs are greater than the thresholds. The zero suppression completes in 3 |micro~sec, and zero-suppressed data become ready within 18 |micro~sec. The operation of the QVC circuit is repeatedly simulated on a workstation in order that the temperature dependence of the QVC circuit could be reduced without sacrificing performance.
- Published
- 1993