An integrated, CMOS, constant-fraction timing discriminator for multichannel detector systems
- Oak Ridge National Lab., TN (United States)
An integrated, CMOS, constant-fraction timing discriminator (CFD) designed to accommodate the special requirements of large, multichannel `el detector systems is described. This CFD features on-chip, zero-crossing shaping and an automatic walk setting to limit the number of user adjustments. The circuit is realized in the Orbit 1.2 micron, N-well, CMOS process and operates with a 5 V power supply. The time walk in a 100:1 dynamic range ({minus}15 mV to {minus}1.5 V) is less than {+-}250 ps for a 10 ns rise time/10 ns fall time signal, yet the power dissipation is about 2 mW/channel. The discriminator has a 170 micron pitch, is 800 microns long, and is structured for arraying multiple channels on a single die. In this work, the fully integrated, CMOS CFD that was designed for the lead-glass calorimeter of the WA-98 experiment is described. This circuit also has applications for some detector subsystems in the Relativistic Heavy Ion Collider (RHIC) detector, PHENIX.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 136900
- Report Number(s):
- CONF-941061--
- Journal Information:
- IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 42; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
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