RICH electronic design


This page is being constructed. Information may not be complete. Last update: 24-Feb-1997

Introduction


to be added

Chip carrier test


VA-RICH Power consumption:
-2V current draws 34 mA, +2V current draws 5 mA. Total power comsumption is 68 mW.
Spark protection:
Spark protection works, but the spark current burns the trace from pad to input transistor, which makes the channel float. In a few cases, spark burns a channel and one of its neighboring channel also. However this is acceptable.
Noise rejection:
Prelimenary study shows that noises on power supply (both +2V and -2V) are amplified. The amplification peaks at 100K Hz. The maximum amplification is around 20 to 30. :-(
VA-RICH noise:
With 3pf input capacitance, the noise is about 170 electrons.
VA-RICH dynamic range:
Within good linearity, the dynamic range goes from -500000 electrons to 500000 electrons.

Circuit diagram


12-bit Receiver & ADC:

Power supply specification


to be added
Send comments to: Marina Artuso or Paul D. Gelling.