BIAS CIRCUIT AND A/D CONVERTER

摘要

PROBLEM TO BE SOLVED: To provide a bias circuit for outputting a desired bias voltage by excluding an influence caused by a dispersion in element performance occurring in the case of production and an A/D converter equipped with the relevant bias circuit. SOLUTION: Input voltages VEP and VEN are generated to make a difference a saturated voltage Veff on the basis of the bias voltage VB fed back and inputted by a Veff detection circuit 1, a four-input operational amplifier 8 inputs the input voltages VEP and VEN generated by the Veff detecting circuit 1 and generates the bias voltage VB by using reference voltages VERP and VERN inputted form the outside. COPYRIGHT: (C)2003,JPO