公开(公告)号：US20250028344A1

公开(公告)日：2025-01-23

申请号：US18770761

申请日：2024-07-12

Applicant: STMicroelectronics International N.V.

Inventor： Alessandra FARINA ,  Roberto Pio BAORDA ,  Stefano RAMORINI

IPC: G05F1/575 ,  G05F1/565

Abstract: An LDO regulator has a pass device arranged between an input node and an output node. The pass device is controlled at a control node by an error amplifier. A first current generator sources compensation current to the control node, a cascode device is arranged between the control node and a compensation node, and a second current generator sinks compensation current from the compensation node. A compensation capacitor is arranged between the output and compensation nodes. Load current through the pass device is sensed to generate a feedback current at a first feedback node. An input branch of a current mirror receives the feedback current. A filtering circuit is coupled between a control terminal of the input branch and a second feedback node. Output branches of the current mirror sink and source additional compensation current from the compensation node and the control node, respectively, proportional to the feedback current.

公开(公告)号：US20250085314A1

公开(公告)日：2025-03-13

申请号：US18367044

申请日：2023-09-12

Applicant: STMicroelectronics International N.V.

Inventor： Francesco BORGIOLI ,  Roberto Pio BAORDA ,  Paolo ANGELINI ,  Danilo Karim KADDOURI ,  Lorenzo ERCOLINI

IPC: G01R15/20 ,  G01R19/10

Abstract: Disclosed herein is a system for measuring current, including an input inductor and a self-test inductor through which respective input and self-test currents flow. A Hall-effect sensor circuit senses magnetic fields around these inductors, producing differential voltage outputs. These outputs are received by an input and self-test extraction circuit, which alternatingly outputs differential voltages representative of the magnetic fields around the inductors. Amplification of these differential voltages is performed by an amplifier. Sampling of the amplified differential voltages is performed by two sample/hold circuits, each designated for a specific inductor's magnetic field. An integrator circuit adjusts a voltage for the Hall effect sensor circuit, causing the gain applied to the sampled differential voltage to remain consistent and uninfluenced by the sensitivity of the Hall effect sensor circuit.