Patent ID: 11892864
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A voltage supervisor, comprising:
a reference current generator having a current mirror, the current mirror configured to provide a first current that is proportional to a difference in gate-to-source voltages of a first transistor and a second transistor;
a third transistor having a gate coupled to the current mirror, a source adapted to be coupled to a power supply, and a drain coupled to a first terminal of a resistor, the third transistor is configured to provide a second current proportional to a difference in a supply voltage and the difference in gate-to-source voltages of the first transistor and the second transistor; and
a fourth transistor having a gate coupled to the gate of the third transistor, a source adapted to be coupled to the power supply, and a drain having a drain voltage indicative of the supply voltage above a threshold; wherein:
the resistor includes a second terminal coupled to a source of a fifth transistor, wherein a gate of the fifth transistor is coupled to a gate of the first transistor and a gate of the second transistor.