Patent ID: 11949320
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An apparatus, comprising:
a switch having a first terminal and a second terminal, the second terminal configured to switch between a ground terminal or a low-side power transistor based on a control signal;
a first current path and a second current path, the first current path having a current path output coupled to the second terminal of the switch, the second current path having a current path output coupled to the ground terminal, and each of the first and second current paths including:
a respective transistor having a control terminal, a first current terminal coupled to an input of the current path, and a second current terminal;
a respective differential amplifier having a positive input, a negative input coupled to the second current terminal, and an output coupled to the control terminal;
a respective variable resistor coupled between the negative input and the current path output;
a current mirror having an input coupled to the input of the first current path, a first output coupled to the input of the second current path, and a second output;
a first buffer having an input and an output, the input of the first buffer coupled to the second output of the current mirror;
a second buffer having an input and an output; and
a third variable resistor coupled between the output of the second buffer and the input of the first buffer.