Multi-channel amplifier with soft common return point

GB2644960APending Publication Date: 2026-07-01CIRRUS LOGIC INT SEMICON LTD
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Patent Information

Authority / Receiving Office
GB · GB
Patent Type
Applications
Current Assignee / Owner
CIRRUS LOGIC INT SEMICON LTD
Filing Date
2024-09-10
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Existing multi-channel amplifiers face challenges in minimizing noise and distortion, particularly when driven by different signals, which can lead to common mode noise and affect signal integrity.

Method used

The system incorporates a plurality of channel switching amplifiers with a shared capacitor and a feedback path to isolate the amplifiers and ensure a flat frequency response. A signal processor processes input signals and feedback signals to regulate the common mode signal and control the voltage range of the common terminal.

Benefits of technology

This configuration reduces noise and distortion, maintains signal integrity, and ensures a flat frequency response across channels, thereby improving the overall performance of the multi-channel amplifier.

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Abstract

A system may include a signal processor that receives a first input signal from a first channel switching amplifier of a multi-channel amplifier and a second input signal from a second channel switchi
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Citation Information

Patent Citations

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    US20080019546A1

  • Self-configurable, dual bridge, power amplifier

    US5621352A

  • Method and system which drives left, right, and subwoofer transducers with multichannel amplifier having reduced power supply requirements

    US6181796B1