A 0.4-mW, 4.7-ps Resolution Single-Loop  TDC Using a Half-Delay Time Integr…

Abstract—A compact, low-power, single-loop third-order delta–sigma () time-to-digital converter (TDC) for time-mode signal processing is presented in this brief. In general, a high-resolution  TDC requires a cascadable time integrator to increase the order of the loop filter. However, implementing the time integrator has been very challenging owing to the difficulty in storing time inf…