Assessment of TFT amplifiers for a-Si:H PIXEL particle detectors

摘要

The application of thin-film electronics technology to making a signal amplifier and readout circuit for amorphous silicon pixel particle detectors which can detect minimum ionizing particles has been investigated. Characteristics of currently available TFTs (thin film transistors) are reviewed, and preliminary designs of a-Si:H and poly-Si amplifiers for a 300- mu m*300- mu m pixel array are proposed. Based on the measurement of small signal parameters and the noise spectrum of individual a-Si:H and poly-Si TFTs, the overall gain, time-response and signal-to-noise ratio are calculated.