1.80 Use the voltage-divider rule to find the transfer function V o(s)/Vi(s) of the circuit in Fig. P1.80. Show that the transfer function can be made independent of frequency if the condition C 1R1 = C2R2 applies. Under this condition the circuit is called a compensated attenuator and is frequently employed in the design of oscilloscope probes. Find the transmission of the compensated attenuator in terms of R 1 and R2.