公开(公告)号：US20230170850A1

公开(公告)日：2023-06-01

申请号：US17537619

申请日：2021-11-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Johnny KLARENBEEK ,  David P. SINGLETON ,  Morgan T. PRIOR ,  Jonathan T. WIGNER ,  Christopher M. DOUGHERTY ,  Qi CAI ,  Anindya BHATTACHARYA

IPC: H03F1/02 ,  H03F3/217

CPC classification number: H03F1/0233 ,  H03F3/217 ,  H03F2200/03 ,  H03F2200/105

Abstract: Class D amplifier circuitry comprising: input buffer circuitry configured to receive a first digital input signal modulated according to a first modulation scheme in which the digital input signal can take a first plurality N of discrete signal levels; analog modulator circuitry configured to generate an analog modulated signal based on an analog output signal output by the input buffer circuitry; and quantizer circuitry configured to generate an output signal based on the analog modulated signal, wherein the output signal is modulated according to a second modulation scheme in which the output signal can take a second plurality M of discrete signal levels, wherein the second plurality M is greater than the first plurality N.