A 212.5Gb/s Pam-4 Receiver With Mutual Inductive Coupled Gm-Tia in 4nm Finfet

This paper presents a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$212.5 ~\text{Gb} / \mathrm{s}$</tex> PAM- 4 receiver (RX) in 4 nm FinFET. The receiver features a hybrid continuous time linear equalizer (CTLE) with stability enhanced commonmode feedback (CMFB), Gm-TIA amplifier with mutual inductive coupling, and clock distribution network using standing wave driver. The receiver occupies <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.56 ~\text{mm}^{2}$</tex> and achieves a BER of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$5.81 \mathrm{e}-6$</tex> at 212.5Gbps, with a total insertion loss of 40dB at 53.125GHz.