Patent ID: 11914410
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A voltage reference circuit, comprising:
a first transistor having first and second current terminals and a first control terminal, the first current terminal coupled to a supply voltage terminal, and the second current terminal coupled to a gate control terminal;
a second transistor having third and fourth current terminals and a second control terminal, the third current terminal coupled to the supply voltage terminal, and the fourth current terminal coupled to the first and second control terminals;
a third transistor having fifth and sixth current terminals and a third control terminal, the fifth current terminal coupled to the gate control terminal;
a fourth transistor having seventh and eighth current terminals and a fourth control terminal, the seventh current terminal coupled to the fourth current terminal, the eighth current terminal coupled to the sixth current terminal, and the fourth control terminal coupled to a reference voltage terminal;
a resistor coupled between an output voltage terminal and the reference voltage terminal;
first, second and third switches, each switch having respective first, second and third switch terminals, the respective second switch terminals connected together and coupled to the output voltage terminal, and the respective third switch terminals connected together and coupled to the reference voltage terminal;
a fifth transistor coupled between the supply voltage terminal and the first switch terminal of the first switch, and having a fifth control terminal coupled to the gate control terminal;
a sixth transistor coupled between the supply voltage terminal and the first switch terminal of the second switch, and having a sixth control terminal coupled to the gate control terminal; and
a seventh transistor coupled between the supply voltage terminal and the first switch terminal of the third switch, and having a seventh control terminal coupled to the gate control terminal.