A time-interleaved sampling delay circuit for IR UWB receivers

This paper presents a time-interleaved sampling delay circuit to be used in an autocorrelation receiver for impulse-radio UWB. It applies a 10 GHz time-interleaved sampling and readout operation for analog signal storage and reconstruction. The delay function is achieved by shifting the sampling and reading clock sequence by a particular time interval. System analysis shows the feasibility of using sampling operation in the delay without losing autocorrelation information, and gives design suggestions for the circuits. The delay circuit has been designed to be implemented in TSMC 0.13 um CMOS technology. Simulation results predict a 500 ps delay at a power consumption of 10 mW from a 1.2 V power supply. Moreover, the delay range from 100 ps to 900 ps can be covered in 100 ps steps without additional power consumption.