Design and Analysis of an Area and Power Efficient Programmable Delay Cell

This work presents a programmable delay cell in 90- nm CMOS technology and 1.1 V supply voltage Vdd. The delay cell provides the variable delay option with eight different modes M0-M7 and maintaining a stable output. Neglecting bond pad and die decoupling capacitor, the structure occupies 0.009 mm$^{2}$. The proposed delay cell consumes only 0.671 $\mu$W at M0 and 3.88 $\mu$W at M7. Besides, for NN process the delay corresponding to the modes ranges between 0.69 – 5.54 $\mu$s at 1.1 V and 27°C. The results of Monte Carlo study show that power and delay changes minimally for M0 and are equal for M7 to that obtained at NN.