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

Claim 4:
5. The circuit of claim 1, wherein:
the output circuit comprises an operational amplifier circuit (op-amp) coupled to a bias current generator to receive a bias current therefrom; and
the op-amp comprises:
an amplifier having a first op-amp input node coupled to the driver circuitry to receive the target voltage therefrom, a second op-amp input node coupled to an op-amp output node via a resistive voltage divider, wherein the op-amp output node is coupled to a control node of a transistor configured to provide the drive current at the heater drive node of the circuit, and
a feedback capacitor having a first capacitor end coupled to the op-amp output node and a second capacitor end coupled to the heater drive node of the circuit and to the second op-amp input node via the resistive voltage divider.