Invention Application
- Patent Title: ZERO-CROSSING MANAGEMENT IN CLASS-D AUDIO AMPLIFIERS
-
Application No.: US17589047Application Date: 2022-01-31
-
Publication No.: US20220247367A1Publication Date: 2022-08-04
- Inventor: John L. Melanson , Cory J. Peterson , Chandra Prakash , Ramin Zanbaghi , Eric Kimball
- Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- Applicant Address: GB Edinburgh
- Assignee: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- Current Assignee: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- Current Assignee Address: GB Edinburgh
- Main IPC: H03F3/217
- IPC: H03F3/217 ; H03F1/26 ; H03F3/187

Abstract:
Class-D amplifier circuits provide operation with low-distortion zero crossings outside of a unipolar power supply voltage range. The amplifiers include a first H-bridge driver circuit and a second H-bridge driver circuit. The class-D amplifier circuits also include a control circuit having an input for receiving an input signal to be reproduced by the class-D amplifier circuit. The control circuit has outputs coupled to inputs of the first and second H-bridge drivers, and includes one or more modulators. The control circuit selects between actively operating a selected one of the driver circuits or both, according to the signal to be reproduced, while setting an unselected driver circuit to turn either a high-side switch or a low-side switch of the unselected one of the first driver circuit or the second driver circuit fully on for at least some cycles of the one or more modulators.
Public/Granted literature
- US11722107B2 Zero-crossing management in Class-D audio amplifiers Public/Granted day:2023-08-08
Information query
IPC分类: