Patent ID: 11929717
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A current limit circuit, comprising:
a first metal oxide semiconductor (MOS) device having a first gate, a first drain, and a first source,
a resistor coupled between the first drain and ground;
a second MOS device having a second gate, a second drain, and a second source, the second gate being coupled to a threshold voltage, the second source being coupled to the first source, and the second drain being coupled to a first current source,
the first MOS device configured to operate in an OFF mode when a drain voltage of the low voltage MOS device is greater than the threshold voltage, and the first MOS device configured to operate in an ON mode when the drain voltage of the low voltage MOS device is less than the threshold voltage;
a plurality of series-connected MOS devices, wherein a first voltage is generated across the plurality of series-connected MOS devices in response to a biasing current supplied to a drain of one of the plurality of series-connected MOS devices, wherein a source of a another of the plurality of series-connected MOS devices is coupled to the resistor; and
a voltage clamp circuit coupled between the drain of the one of the plurality of series-connected MOS devices and a gate of the low voltage MOS device in the output stage of the operational amplifier.