A new programmable delay cell with good symmetry for the digital IR-UWB pulse generator

摘要

This paper proposes a new programmable delay cell controlled by a 4-bit binary coding inverter array for the digital impulse radio (IR) ultra wide band (UWB) pulse generator. Implemented in a TSMC 0.18μm technology, simulation results show that the proposed circuit can generate a coarse tuning range of pulse width with good symmetry from 118ps to 227ps with different control signal from 0001 to 1111. The UBW pulse generator consumes only 1.6mW at 1Gbit/s data rate when the control signal is 0001 at a VDD voltage of 1.8V and occupies a small area of 162μm*44μm.