HX2: a 16-channel charge amplifier IC for the read-out of X-ray detectors
| Autor: | Paul Seller, P.H. Sharp, S.L. Thomas |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Physics
Nuclear and High Energy Physics business.industry Dynamic range Amplifier Detector Electrical engineering X-ray detector Dead time Particle detector Photodiode law.invention Nuclear Energy and Engineering law Nuclear electronics Operational amplifier Optoelectronics Electrical and Electronic Engineering business Charge amplifier |
| Zdroj: | Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94. |
| Popis: | RAL Microelectronics Group has developed a 16-channel multiplexed charge amplifier IC (HX2) for the read-out of cadmium telluride X-ray detectors. The IC has been incorporated into a prototype X-ray imaging system intended for non-destructive production line monitoring. The HX2 contains an array of 16 integrating amplifiers, each with a 10 pF feedback capacitor, and a dynamic range of 20 pC. The integration period can be varied over the range /spl sim/5 /spl mu/s to /spl sim/100 ms. In order to extend its range of applications, HX2 was designed with two modes of operation. In the first mode, the integration period is followed by the read-out period where the 16 channels are multiplexed onto an analogue output bus. The next integration period starts when this read-out has finished. In the second mode, the read-out of the voltages from one integration period takes place during the subsequent integration period. This overlapping of integration and read-out periods reduces the dead time of the HX2. The IC has a signal-to-noise ratio which is typically above 10000:1, and is suitable for the high-resolution read-out of other detector systems, such as photodiode arrays. The dual-mode operation allows it to work with detectors producing either continuous or pulsed currents. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|