A semiconductor circuit which has a first field-effect transistor of N-channel type and second and third field-effect transistors of P-channel type, each transistor having a gate, a source, a drain and a substrate, and a capacitor for storage. A series circuit is formed of the first, second and third transistors, the capacitor is connected to a connection point of the series circuit, and first and second voltage sources are connected to both ends of the series circuit. The substrates of the firs...