Abstract
An integrated, CMOS, constant-fraction timing discriminator (CFD) that is designed to accommodate the special requirements of large, multichannel 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 5V power supply. The time walk in a 100:1 dynamic range (-15mV to -1.5V) is less than ±250ps for a 10ns rise time - 10ns fall time signal, yet the power dissipation is about 2mW/channel. The discriminator has a 170μM pitch, is 800μM long, and is structured for arraying multiple channels on a single die.
Original language | English |
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Pages | 320-324 |
Number of pages | 5 |
State | Published - 1995 |
Event | Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA Duration: Oct 30 1994 → Nov 5 1994 |
Conference
Conference | Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) |
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City | Norfolk, VA, USA |
Period | 10/30/94 → 11/5/94 |