Bandgap reference power generation circuit and integrated circuit
AssigneeAutochips Inc.
InventorKe Wang
Life of this patent
Estimating the term…
Abstract
The present disclosure discloses a bandgap reference power generation circuit and an integrated circuit. The bandgap reference power generation circuit includes a bias circuit and a bandgap reference core circuit. The bias circuit is configured to provide starting current according to a bias voltage. The bandgap reference core circuit is connected to the bias circuit to receive the starting current and goes into a stable operating state according to the starting current to output a preset voltage or preset current. The integrated circuit includes the bandgap reference power generation circuit. By the aforementioned method, the present disclosure can simplify a circuit design and reduce power consumption.
Claims10
A bandgap reference power generation circuit, comprising:
- a bias circuit configured to provide starting current according to a bias voltage;
- a bandgap reference core circuit connected to the bias circuit to receive the starting current and going into a stable operating state according to the starting current to output a preset voltage or preset current;
- wherein the bandgap reference core circuit comprises an operational amplifier connected to the bias circuit such that a first voltage terminal of the operational amplifier is connected to a first voltage via the bias circuit and a second voltage terminal of the operational amplifier is connected to a second voltage;
- and
- a bias voltage supply circuit connected to the bias circuit to supply the bias voltage to the bias circuit, comprising:
- a thirteenth transistor comprising a control terminal, a first pathway terminal and a second pathway terminal, wherein, the first pathway terminal is connected to the first voltage, the control terminal of the thirteenth transistor is connected to the second pathway terminal, and a connection point between the control terminal of the thirteenth transistor and the second pathway terminal serves as an output terminal of the bias voltage supply circuit to output the bias voltage;
- and
- a fourth resistor comprising a first terminal and a second terminal, wherein, the first terminal of the fourth resistor is connected to the second pathway terminal of the thirteenth transistor, and the second terminal of the fourth resistor is connected to the second voltage.
An integrated circuit comprising a bandgap reference power generation circuit, wherein the bandgap reference power generation circuit comprises:
- a bias circuit configured to provide starting current according to a bias voltage;
- a bandgap reference core circuit connected to the bias circuit to receive the starting current and going into a stable operating state according to the starting current to output a preset voltage or preset current;
- wherein the bandgap reference core circuit comprises an operational amplifier connected to the bias circuit such that a first voltage terminal of the operational amplifier is connected to a first voltage via the bias circuit and a second voltage terminal of the operational amplifier is connected to a second voltage;
- and
- a bias voltage supply circuit connected to the bias circuit to supply the bias voltage to the bias circuit, comprising:
- a thirteenth transistor comprising a control terminal, a first pathway terminal and a second pathway terminal, wherein, the first pathway terminal is connected to the first voltage, the control terminal of the thirteenth transistor is connected to the second pathway terminal, and a connection point between the control terminal of the thirteenth transistor and the second pathway terminal serves as an output terminal of the bias voltage supply circuit to output the bias voltage;
- and
- a fourth resistor comprising a first terminal and a second terminal, wherein, the first terminal of the fourth resistor is connected to the second pathway terminal of the thirteenth transistor, and the second terminal of the fourth resistor is connected to the second voltage.
Dependencies are inferred from the claim text.