US 11,962,294 B2 · Calibration of driver output current

Abstract

A method for driving an output node includes driving a control node of an output device coupled to the output node according to an input signal and using a fixed regulated voltage and a variable regulated voltage. The method includes generating the fixed regulated voltage based on a first power supply voltage, a second power supply voltage, and a first reference voltage. The method includes generating the variable regulated voltage based on the first power supply voltage, the second power supply voltage, and a second reference voltage. The method includes generating the second reference voltage based on the first power supply voltage, the second power supply voltage, a reference current, and a predetermined target voltage level of the control node of the output device. In an embodiment of the method, generating the second reference voltage includes periodically calibrating the second reference voltage.

Claims20

Dependent claims

An integrated circuit comprising:

an output device;
a pre-driver circuit configured to drive a control node of the output device according to an input signal using a fixed regulated voltage and a variable regulated voltage;
a fixed voltage regulator circuit configured to generate the fixed regulated voltage based on a first reference voltage level;
a variable voltage regulator circuit configured to generate the variable regulated voltage based on a second reference voltage;
and
a reference voltage generator circuit configured to generate the second reference voltage based on a reference current and a target voltage level.

3 more elements

Dependencies are inferred from the claim text.

Calibration of driver output current

Life of this patent

Calibration of driver output current

Life of this patent

Abstract

Claims20