Differential amplifier circuit

摘要

In one embodiment, a differential amplifier circuit includes a first input terminal, a second input terminal, a first transistor, a second transistor, a third transistor, a current source, a first output terminal, a second output terminal, a first passive element, and a second passive element. The first (second) transistor has a control terminal connected to the first (second) input terminal. The third transistor has a control terminal. The control terminal is applied predetermined bias voltage. The current source is connected to a first terminal in each of the first transistor, second transistor, and third transistor. The first (second) output terminal is connected to a second terminal of the first (second) transistor. The first (second) passive element is connected between the first (second) input terminal and the first (second) output terminal.

主权项

1. A differential amplifier circuit, comprising:
a first input terminal; a second input terminal; a first transistor having a control terminal connected to the first input terminal; a second transistor having a control terminal connected to the second input terminal; a third transistor having a control terminal applied predetermined bias voltage; a current source connected to a first terminal of each of the first transistor, the second transistor, and the third transistor; a first output terminal connected to a second terminal of the first transistor; a second output terminal connected to a second terminal of the second transistor; a first passive element connected between the first input terminal and the first output terminal; a second passive element connected between the second input terminal and the second output terminal; and a load circuit connected to the second terminal of each of the first transistor and the second transistor; wherein the load circuit is a current mirror circuit configured to copy current flowing in the third transistor and apply the current to the first transistor and the second transistor.