Invention Application
- Patent Title: DEVICE AND METHOD FOR REDUCING CLIPPING IN AN AMPLIFIER
- Patent Title (中): 用于减小放大器中的剪辑的装置和方法
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Application No.: US14534727Application Date: 2014-11-06
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Publication No.: US20150214902A1Publication Date: 2015-07-30
- Inventor: Hong Wu Lin
- Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
- Applicant Address: CN Shenzhen
- Assignee: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD
- Current Assignee: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD
- Current Assignee Address: CN Shenzhen
- Priority: CN201410045780.1 20140128
- Main IPC: H03F1/26
- IPC: H03F1/26 ; H03F3/183 ; H03F3/217

Abstract:
Limiting clipping in an amplifier is accomplished in the feedback loop of a class D PWM amplifier that includes an integrator coupled to an input node and configured to generate an integrated input signal such that a comparator may then generate a PWM signal for driving an amplifier output stage based on a comparison to a triangle wave signal. To this end, the amplifier also includes a threshold signal generator for generating high and low voltage thresholds based on the triangle wave signal to be used to engage compensation circuits for limiting the overall amplification. Such compensation circuits may be bipolar junction transistors that are disposed in the feedback loop of the integrator. Thus, the overall bandwidth of the amplifier itself is not affected by adding a limiter circuit aimed at reducing clipping.
Public/Granted literature
- US09525385B2 Device and method for reducing clipping in an amplifier Public/Granted day:2016-12-20
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