公开(公告)号：US20250132730A1

公开(公告)日：2025-04-24

申请号：US18491252

申请日：2023-10-20

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.

Inventor： Payel Mukherjee ,  Rupesh Khare ,  Ambreesh Bhattad

IPC: H03F1/02 ,  H03F3/213

Abstract: An amplifier circuit and its method of operation reduce leakage in the output stage of the under no-load or low-load conditions. The amplifier circuit includes an amplifier stage that generates an output signal, an output stage including an output device, a pre-driver device coupled to a gate of the output device, and a feedback connection from the output device to the amplifier stage. A power supply rail of the amplifier is provided by a first power supply voltage, and the output signal of the amplifier stage is coupled to an input of the pre-driver device. A power supply rail of the output stage is provided by a second power supply voltage having a magnitude less than the first power supply voltage. An increased voltage magnitude at the output stage is compensated by driving a channel field potential of the output device above the second power supply voltage.