| 摘要 |
A bandgap reference circuit incorporates first, second, and third current sources, an operational amplifier coupled to the second and the third current sources, a voltage divider, a first resistor, and first, second, and third bipolar transistors. The second bipolar transistor has a base configured to receive a bias voltage from the voltage divider. The third bipolar transistor has a base and a collector electrically connected to the ground voltage. The first resistor is coupled between the third current source and the third bipolar transistor. |
| 主权项 |
1. A bandgap reference circuit, comprising:
first, second, and third current sources; an operational amplifier electrically connected to the first, second, and third current sources; a first bipolar transistor having a base, an emitter, and a collector, the emitter electrically connected to the first current source, the base and the collector coupled to a ground voltage; a voltage divider electrically connected between the emitter of the to first bipolar transistor, wherein the voltage divider provides a bias voltage proportional to a base-emitter voltage of the first bipolar transistor; a second bipolar transistor having a base, an emitter, and a collector, the base configured to receive the bias voltage, the emitter electrically connected to the second current source, and the collector electrically connected to the ground voltage; a third bipolar transistor having a base, an emitter, and a collector, the base and the collector electrically connected to the ground voltage; and a first resistor electrically connected between the third current source and the emitter of the third bipolar transistor. |
