18K Channel Readout IC Operating in SPC Mode with Multithreshold Interpixel Communication

Le résumé fourni par la source

This paper presents an IC of pixel architecture operating in SPC mode for readout hybrid pixel detectors used in X-ray applications. The core of the IC is a matrix of$96 \times 192$square-shaped pixels of$100 \mu ~\mathrm{m}$pitch. Each pixel contains a fast analog front-end (15 ns peaking time) with four independently working discriminators and four 12-bit ripple counters. The pixel counters support multiple modes of operation, all utilizing a global shutter. The most important modes of operation of pixel counters are standard mode (four 12-bit counters), long counter mode (two 24-bit counters), and continuous mode with the counters alternately being read out and collecting the data. Additionally, the number of readout bits from each 12 -bit counter can be set to$1,2,8$, or 12 bits. To minimize the effects of the charge sharing the Multithreshold Pattern Recognition is implemented in the IC. The algorithm operates both in the analog domain (to recover the charge spread between neighboring pixels when a single X-ray photon hits the pixel borders) and the digital domain (to allocate a hit position to a single pixel).

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