first pmos transistor 86 a second pmos transistor 88 a first nmos transistor 90 a second nmos transistor 92 a third nmos transistor 94 and a fourth nmos transistor 96 the first pmos transistor 86 has one terminal connected to a voltage source also referred to as u201c connected to high u201d and another terminal connected to a terminal of the first nmos transistor 90 the first nmos transistor 90 in addition to having a terminal connected to a terminal of the first pmos transistor 86 has another terminal connected to a terminal of the third nmos transistor 94 the third nmos transistor 94 in addition to having a terminal connected to a terminal of the second nmos transistor 92 has another terminal connected to ground also referred to as u201c connected to low u201d the second pmos transistor 88 has a terminal connected to high and another terminal connected to a terminal of the second nmos transistor 92 the second nmos transistor 92 in addition to having a terminal connected to a terminal of the second pmos transistor 88 has another terminal connected to a terminal of the fourth nmos transistor 96 the fourth nmos transistor 96 in addition to having a terminal connected to a terminal of the second nmos transistor 92 has another terminal connected to ground the slave stage 84 has an eighth nmos transistor 112 a seventh nmos transistor 114 a fifth pmos transistor.