Offset adjusting apparatus for canceling offset voltage generated in difference amplifier

摘要

An offset adjusting apparatus includes transistor groups of transistors connected in parallel to each other. The transistor groups are connected in parallel to either a pair of transistors distributed on a first side of a differential head section and a current mirror section or a pair of transistors distributed on a second side of the differential head section and the current mirror section. The offset adjusting apparatus further includes a control circuit for controlling the turning on and turning off of each transistor of the transistor groups.