A 1310/1550nm Fully-Integrated Optical Receiver with Schottky Photodiode and Low-Noise Transimpedance Amplifier in 40nm Bulk CMOS

© 2018 IEEE. This paper presents an optical receiver in 40 nm bulk CMOS for 1310 and 1550 nm light, which is used for singlemode fiber communication. A Schottky photodiode converts the light into a current with a responsivity of 1 and 0.3 mA/W respectively. A 3-stage voltage amplifier with negative resistive and positive capacitive feedback is used as transimpedance amplifier with a simulated integrated input-referred noise current of less than 100 and 200 nA for a bandwidth of 0.5 and 1 GHz respectively. Measurement results are presented of the chip, which consumes 48.7mW, for both 1310 and 1550nm light. For 1310 nm light, bit rates up to 1 Gb/s are received with a bit error rate of 10-10 and a sensitivity of 3.4 dBm. To the authors' best knowledge, this is the first fully-integrated optical receiver in bulk CMOS for these wavelengths.status: Published onlin