This paper proposes a pico-second precision programmable mixed-signal CMOS square-wave delayer which achieves the function of linearity

original input waveform duplication

variable resolution and low power consumption.And it can be integrated in the small size chip under low cost.The principle of the system is analyzed.The system is modeled and simulated with Tanner EDA tools.Simulation results validate that a highest resolution of 20ps/LSB and maximum delay range of 28ns can be achieved using 0.6m mixed-signal CMOS fabrication process

an 8-bit digital delay control signal and a 2-bit digital range selection signal.