JSSC 2020第12期Data Converters65nmNeural Network Accelerator

An 8-Bit 10-GSs 16 Interpolation-Based Time-Domain ADC With 15-ps Uncalibrated Q

一款8位10GS/s时间域ADC，采用16倍时间插值和四通道交织技术，无需校准即可实现15ps量化精度。

65nm CMOS, 1.0V, 10GS/s, 40.1dB SNDR, 50.8mW, 61.5fJ/step

时间域ADC电压时间转换器时间数字转换器时间交织亚稳态抑制

▸四通道时间交织实现10GS/s采样率

▸16倍时间插值TDC无需PVT校准

▸时序扩展残差传输降低亚稳态误差率

Abstract

This article presents an 8-bit time-domain analog- to-digital converter (ADC) that achieves 10 GS/s by aggregating only four time-interleaved channels. It also experiences less than 3.0-dB signal-to-noise and distortion ratio (SNDR) drop at an 18-GHz input frequency from a dc input due to its small input capacitance and inherent voltage-to-time converter (VTC)- based sub-channel buffer. A 16 × time-interpolation-based time- to-digital converter (TDC) resolves in two steps while allowing both the