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Title A 28 Gb/s Receiver Front-end Capable of Receiving Wide Range Current Signal in 65 nm CMOS
Authors (Daehyun Koh) ; (Daniel Jeong) ; (Jeongho Hwang) ; (Deog-Kyoon Jeong)
Page pp.475-481
ISSN 1598-1657
Keywords Receiver front-end; inverter-based Cherry-Hooper amplifier with an inductor; avalanche photodiode
Abstract This paper presents a receiver front-end fabricated in a 65 nm CMOS process to receive a wide range of high current input from the avalanche photodiode (APD). The transimpedance amplifier (TIA) consists of a resistive feedback inverter and three cascaded Cherry-Hooper amplifiers (CHAs) to obtain a high gain-bandwidth product. The TIA automatically subtracts input DC current. In addition, using inductors in the Cherry-Hooper amplifiers, the bandwidth of the TIA is improved from 14 GHz to 29.5 GHz. The receiver front-end chip has an active area of 0.22 mm2, and its energy efficiency is 1.3 pJ/bit. Input DC current range is measured up to 3 mA at 28 Gb/s.