An integrated readout circuit for personal dosimetry with phase-shift compensation technique to improve stability

作者：Zhang Yacong^*; Li Jing; Chen Zhongjian; An Huiyao; Zhou Chunzhi; Shao Jianhui

来源：MICROELECTRONICS JOURNAL, 2011, 42(2): 334-340.

DOI：10.1016/j.mejo.2010.11.007

• Personal dosimetry
• Radiation detection
• Readout circuit
• Stability
• Phase-shift compensation

In this paper an integrated CMOS readout circuit for a radiation detector in a personal dosimeter is presented. High counting rate and low power requirements make the stability of the conventional high-pass pulse shaper a big problem. A novel phase-shift compensation method is proposed to improve the phase margin. The principle of the compensation circuit and its influence on noise performance are analyzed theoretically. A readout chip with two channels of conventional structure and one channel of the proposed structure has been implemented in a 0.35 mu m CMOS technology. It occupies an area of 2.113 x 0.81 mm(2). Measurement results show that the proposed channel can process up to 1 MHz counting rate and provide a conversion gain of about 170 mV/fC at a power dissipation of 330 mu W with a 3.3 V power supply. Ac-coupled to a silicon PIN detector, it successfully detects beta-rays.

• 出版日期2011-2
• 单位北京大学