公开(公告)号：US12101085B1

公开(公告)日：2024-09-24

申请号：US18188067

申请日：2023-03-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ross C. Morgan ,  Joe Walker ,  Yongjie Cheng ,  Lingli Zhang

IPC: H03K17/693 ,  H03K3/017 ,  H03K17/687

CPC classification number: H03K17/693 ,  H03K3/017 ,  H03K17/6871

Abstract: This application relates to methods and apparatus for multichannel drivers for driving transducers in different channels. A multichannel driver has a plurality of output stages configured such that two output nodes can be modulated between selected switching voltages with a controlled duty cycle to generate a differential output signal across a respective transducer, each output stage being operable with different switching voltages in different modes of operation. A first set of two or more of the output stages are arranged to receive a voltage output by a capacitive voltage generator to use as a switching voltage. A controller is configured to control the mode of operation and duty-cycle of each of the output stages based on a respective input signal and also based on operation of the other output stages of the first set.