All-digital synchronous 2 × time-difference amplifier based on time register

A novel 2 × time-difference amplifier (TDA) in 65 nm CMOS technology is presented. Unlike traditional analogue TDA, the proposed TDA, employing an all-digital synchronous architecture, achieves 2 × TDA in a time subtracting way based on time register. Multi-path negative skewed gated delay cells are utilised to minimise gating skew error in the time register. To make up for the delay mismatch in t...