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12 July 2018 VERITAS 2.2: a low noise source follower and drain current readout integrated circuit for the wide field imager on the Athena x-ray satellite
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Abstract
VERITAS 2.2 is an evolutionary step of the VERITAS readout integrated circuit (ROIC) architecture designed for high speed, low noise DEPFET source follower or drain readout for the Wide Field Imager on the Athena X-ray satellite. Drain readout, also known as current readout, mitigates the RC time of the classical source follower readout. This is particularly beneficial for large DEPFET detectors where the line capacitance is large, with the current measured at the drain of the DEPFET transistor providing an immediate signal proportional to the collected charge in the pixel. VERITAS 2.2 is designed to address the implementation challenges of drain readout and deliver consistent performance at short processing time (2.5 μs) with a system noise better than 3 e - .
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sven Herrmann, Anna Koch, Sara Obergassel, Wolfgang Treberspurg, Michael Bonholzer, and Norbert Meidinger "VERITAS 2.2: a low noise source follower and drain current readout integrated circuit for the wide field imager on the Athena x-ray satellite", Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 1070935 (12 July 2018); https://doi.org/10.1117/12.2314335
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