2019 年 16 巻 2 号 p. 20180910
High-speed optocoupler is widely used in aerospace field, it is required to have tolerance of radiation in the application environment. The key module of optocoupler is optical receiver chip. This paper introduces a kind of radiation-hardened optical receiver chip. A transimpedance amplifier with gain self-regulating circuit, a signal amplitude detector and adjustable inverter, a reference with DTMOS and enclosed gate layout are designed for radiation hardening. The proposed chip is fabricated in a standard 0.5 µm CMOS process. Experimental results indicate that the hardened chip can still work at the total dose of 400 Krad(Si).
