公开(公告)号：US20240045456A1

公开(公告)日：2024-02-08

申请号：US17883216

申请日：2022-08-08

Applicant: Advanced Micro Devices, Inc.

Inventor： Onn Lim Yong ,  Luca Ravezzi ,  Naman Parashar ,  Jeremy Zaks Walker

IPC: G05F1/575

CPC classification number: G05F1/575

Abstract: A method for regulating a supply voltage includes generating an output voltage on an output power supply node based on an input voltage on an input power supply node and a control signal on a control node of a common drain amplifier. The method includes generating the control signal using a mirrored current generated based on the input voltage. The mirrored current may be generated using a noise-compensating capacitor having a capacitance CNC, thereby compensating for a noise current generated by a parasitic gate-to-drain capacitance of the common drain amplifier based on the input voltage. The capacitance CNC may be approximately equal to 1/N times a parasitic gate-to-drain capacitance of the common drain amplifier, where N is greater than one. The current may be further based on a difference between a reference voltage and the output voltage on the output power supply node.