Question

As Vi goes from VDD to OV, 와 QN VDD Rpi RTG Cin2 Given: Qpi has W/L-2, both Qng and Qp2 have W/L-1, Cout -1 Croi-cTG2 5fF, and Cin,-10fF ftF 1) Find Rpi and RTG 2) Estimate the propagation delay tp

Answer 1

a). using equation R_p1 = 30/(w/l)_p k Ohm we have R_p1 = 30/2 k Ohm = 15 k Ohm using equation R_TG tilde 12.5/(w/l)_n k Ohm we have R_TG = 12.5/1 k Ohm = 12.5 k Ohm (b) using equation (for step input) t_p = 0.69 [(c_out1 + c_CTG1) R_p1 + c_in 2 + c_TG2) (R_p1 + R_TG)] implies t_p = 0.69 [(10 + f + 5t f) (15 k Ohm) + (10 + f + 5tf) (15 k Ohm + 12.5 k Ohm)] = 0.44 Ohm s with a ramp input the 0.69 is dropped resulting in t_p = 0.44 ns/0.69 = 0.64 ns