Patent ID: 11922979
Assignee: STMICROELECTRONICS S.R.L.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A method of operating a heater resistor, the method comprising:
providing a current to the heater resistor using a circuit comprising an output transistor having an output node coupled to the heater resistor, an amplifier having an output coupled to a control node of the output transistor, a voltage divider circuit having an input coupled to the output node of the output transistor and a divided output node coupled to a first input of the amplifier, and a feedback capacitor coupled between the output of the amplifier and the output node of the output transistor;
controlling a slew rate of a voltage at the output node of the output transistor based on a bias current of the amplifier and a capacitance of the feedback capacitor.