A 128-Gb/s <i>D</i>-Band Receiver With Integrated PLL and ADC Achieving 1.95-pJ/b Efficiency in 22-nm FinFET
Abhishek Agrawal, Amy Whitcombe, Woorim Shin, Ritesh Bhat, Somnath Kundu, Peter Sagazio, Hariprasad Chandrakumar, Thomas W. Brown, Brent Carlton, Christopher Hull, Steven Callender, Stefano Pellerano
Abstract
This work presents a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${D}$ </tex-math></inline-formula> -band (110–170 GHz) receiver (RX) with integrated analog-to-digital converter (ADC) and phase-locked loop (PLL). The receiver front end (RXFE) consists of a coupled-line-based Guanella balun matching network, 140-GHz low-noise amplifier (LNA), and Cherry–Hooper (CH) amplifier providing <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$>$ </tex-math></inline-formula> 20-GHz baseband bandwidth. A quadrature PLL provides I/Q local oscillator (LO) signals for down-conversion. Two 32-GS/s hybrid voltage- and time-domain ADCs digitize the RXFE output. The fully integrated 22-nm FinFET CMOS prototype achieves a peak data rate of 128 Gb/s using 16-QAM modulation with –15.2-dB EVM and consumes 246 mW for 1.95-pJ/b efficiency. The stand-alone RXFE without ADC provides 160-Gb/s data rates with –16.4-dB EVM and consumes 166 mW for 1.04-pJ/b efficiency.