Find the low-frequency gain a0 5 voyvsig and use OCTC analysis to estimate f23 dB for the BiCMOS folded-cascode circuit of Fig. P6.40 if Rsig 5 2 kV and RL 5 100 kV. Assume both transistors are biased...

Find the low-frequency gain a0 5 voyvsig and use OCTC analysis to estimate f23 dB for the BiCMOS folded-cascode circuit of Fig. P6.40 if Rsig 5 2 kV and RL 5 100 kV. Assume both transistors are biased at 0.5 mA and have fT 5 500 MHz. Moreover, Qn has 01 5 250, VA 5 50 V, rb 5 250 V, and C 5 Cs 5 0.25 pF, and Mp has k 5 2.25 mA/V2 , 5 1/(20 V), 5 0.2, and Cgd 5 Cdb 5 50 fF.