公开(公告)号：US20250055447A1

公开(公告)日：2025-02-13

申请号：US18798124

申请日：2024-08-08

Applicant: STMicroelectronics International N.V.

Inventor： Abdessamed MEKKI ,  Laurent SIMONY

IPC: H03K4/06 ,  H04N25/78

Abstract: A circuit includes a first capacitance array formed by n nominally equal capacitive elements. A first electrode of each capacitive element is coupled, via respective switches to either a reference voltage or ground. A differential amplifier has a first input coupled to an output of a first capacitance array, a second input grounded, and an output generating a voltage ramp. A capacitive feedback circuit couples the output of the differential amplifier to the first input. A second capacitance array has an output coupled to the first input of the differential amplifier. The capacitive elements of the first capacitance array are organized in sets. The circuit operates by controllably coupling, set by set, second electrodes of the capacitive elements of the first capacitance array to the first input of the differential amplifier.