The circuit is composed by 3 PMOS transistors (P 1, P2 and P3) and 3 NMOS transistors (N1, N2 and N3. It has two inputs (a and c ) and one output (f). An intermediate signal is also present (b).

Vdd Vdd Vdd P2 P3 P1 N1 N2 N3 GND GND