Operation amplifier circuit, drive circuit and method of controlling operation amplifier circuit

摘要

An operational amplifier circuit includes a differential section, an output section having drive transistors PT15 and NT15, a voltage setting circuit which sets a programming voltage at a node N1, and a capacitance element C1. The programming voltage is set to the node N1, and then a change in voltage at an output node NQ1 of the differential section is transferred to the node N1 by the capacitance element C1. Switching elements SW1 and SW2 are turned off before the programming voltage is set to the node N1, and are turned on after the setting. A switching element SW4 is turned on and the node N1 is set to VSS, and subsequently the node N1 is set to the programming voltage (VDD−VTH) by turning on the switching element SW3. The programming voltage is set in a switching period between scan periods.