Patent ID: 11914412
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 10:
11. The circuit of claim 10, wherein the crude bandgap generator includes:
a third bipolar transistor having first, second and third terminals, in which the first terminal of the third bipolar transistor is coupled to the power input terminal, and the second terminal of the third bipolar transistor is coupled to a first end of a sixth resistor and to the third terminal of the third bipolar transistor;
a fourth bipolar transistor having first, second and third terminals, in which the first terminal of the fourth bipolar transistor is coupled to the power input terminal, and the third terminal of the fourth bipolar transistor is coupled to a second end of the sixth resistor;
a fifth resistor having first and second ends, in which the first end is coupled to the power input terminal;
a fifth bipolar transistor having first, second and third terminals, in which the first terminal of the fifth bipolar transistor is coupled to the respective second ends of the fifth resistor and the sixth resistor, and the second terminal of the fifth bipolar transistor is coupled to the second beta current mirror circuit;
a seventh resistor having first and second ends, in which the first end is coupled to the second terminal of the fourth bipolar transistor and to the third terminal of the fifth bipolar transistor, and the second end is coupled to a first end of a third switch, and a second end of the third switch is coupled to the ground terminal;
an eighth resistor having first and second ends, in which the first end is coupled to the power input terminal;
a sixth bipolar transistor having first, second and third terminals, in which the first terminal of the sixth bipolar transistor is coupled to the second end of the eighth resistor, and the second terminal of the sixth bipolar transistor is coupled to the signal generator;
a seventh bipolar transistor having first, second and third terminals, in which the first terminal of the seventh bipolar transistor is coupled to the power input terminal, and the third terminal of the seventh bipolar transistor is coupled to the second end of the eighth resistor; and
a ninth resistor having first and second ends, in which the first end of the ninth resistor is coupled to the second terminal of the seventh bipolar transistor and to the third terminal of the sixth bipolar transistor, and the second end of the ninth resistor is coupled to the ground terminal.