Patent ID: 6353362
Filing Date: 2002-03-05
Classification: H03F

Abstract:
An output stage of a complementary bipolar operational amplifier comprising:a first bipolar transistor; a second bipolar transistor coupled to the first bipolar transistor; a third bipolar transistor; a fourth bipolar transistor; a first resistor coupled between a base of the first bipolar transistor and the third bipolar transistor; a second resistor coupled between a base of the second bipolar transistor and the fourth bipolar transistor; a first current source; a second current source; a third resistor coupled between the first current source and the third transistor; a fourth resistor coupled between the second current source and the fourth transistor; a fifth resistor coupled between a base of the third transistor and a common node; a sixth resistor coupled between a base of the fourth transistor and the common node; a first input stage current source coupled to the base of the third transistor; and a second input stage current source coupled to the base of the fourth transistor.