Patent ID: 8384055
Filing Date: 2013-02-26
Classification: G05F,H01L,H03F

Abstract:
1. An output circuit comprising: a bias circuit that operates when a power supply voltage equal to or larger than a predetermined voltage is applied; a differential amplifier circuit that outputs signals according to input differential signals upon receiving a bias current or a bias voltage generated when the bias circuit is operated; an output stage circuit that receives differential signals according to an output from the differential amplifier circuit and outputs output signals according to the differential signals, the output stage circuit having fewer number of stages of elements connected in series than the bias circuit; and a pull-down circuit that forcibly sets a level of one of the differential signals received by the output stage circuit to a ground voltage to fix the level of the output signals output from the output stage circuit when the bias current or the bias voltage generated by the bias circuit is not supplied.