Research Article
Design of a Nanosecond Voltage Comparator with PECL Logic for a Photon-Counting Radiation Imaging System Application
Table 5
Parameters of two laboratory tests (with and without radioactive source) and the results obtained.
| | Laboratory test 1 | Laboratory test 2 (with radioactive source) | Sine input frequency
(MHz) | Propagation delay
(ns) | System no-load count-rate | Pileup rate (%) | Vref
(V) | Count loss
(%) | Minimum recognized pulse width |
| | 50 | 0.60 | 3.92 × 105/s | 2.38 | 0.20 | 3.13 | ∼3 ns | | 100 | 0.80 | 0.30 | 4.17 | | 150 | 0.83 | 0.45 | 4.98 |
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