Invention Grant
US08212612B2 Closed-loop class-D amplifier with modulated reference signal and related method
有权
具有调制参考信号的闭环D类放大器及相关方法
- Patent Title: Closed-loop class-D amplifier with modulated reference signal and related method
- Patent Title (中): 具有调制参考信号的闭环D类放大器及相关方法
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Application No.: US12804318Application Date: 2010-07-19
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Publication No.: US08212612B2Publication Date: 2012-07-03
- Inventor: Jungwoo Song , Xicheng Jiang , Minsheng Wang , Todd L. Brooks
- Applicant: Jungwoo Song , Xicheng Jiang , Minsheng Wang , Todd L. Brooks
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Farjami & Farjami LLP
- Main IPC: H03F3/38
- IPC: H03F3/38 ; H03F3/217

Abstract:
Disclosed is a closed-loop class-D amplifier circuit including a modulated reference signal generator that provides a modulated reference signal in a feed-forward path, where the reference signal is modulated corresponding to an input signal. The closed-loop class-D amplifier circuit further includes a comparator to generate a control signal based on a comparison of the modulated reference signal and a correction signal, which in turn is produced by filtering a combination of the input signal and a feedback signal. The closed-loop class-D amplifier circuit also includes a pulse generator to generate a pulse-width-modulated signal to drive an output stage of the closed-loop class-D amplifier based on the control signal.
Public/Granted literature
- US20120013402A1 Closed-loop class-d amplifier with modulated reference signal and related method Public/Granted day:2012-01-19
Information query
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