Using your second $4007$ array, build a PMOS current mirror using the $$P$2$ and $$P$3$ FETs

from your PMOS array IC$.$ Use RX $=$ ~$1$ kohms as an ammeter. $($Measure VX and use the

measured value of RX to find P$3$s drain current I$3=$ VX$/$ RX$.)$ Initially set V$3$ to $0$VDC using a

waveform generator and choose a value for R$2$ to set I$3$ to roughly $0\mathrm{.}05$ mA$.$