A 112 Gbps DSP-based PAM4 SerDes receiver with a wide band equalization tuning AFE in 7 nm FinFET

• A 112 Gbps DSP-based PAM4 SerDes receiver with a wide band equalization tuning AFE is implemented in 7 nm FinFET. • The AFE provides flexible equalization gain tuning up to 17.5 dB at Nyquist frequency without affecting DC gain. • The receiver achieves a BER of 6×10⁻⁹ over a 29.6 dB insertion loss channel after digital FIR equalization. • The AFE combines source degeneration, feedforward high-pass branch, and inductive feedback peaking TIA for wideband equalization.