DECODER CIRCUIT

摘要

A decoder circuit comprises a differential amplifier circuit which receives one or a plurality of line selection signals which are to be decoded, switching circuits for switching predetermined line systems in high or low level states according to the output signal supplied from the differential amplifier circuit, and constant current supplying circuits for supplying constant current to predetermined lines of the above line systems according to the signal supplied from the switching circuits. The switching circuits are connected in parallel with respect to the constant current supplying circuits.