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公开(公告)号：US08848945B2
公开(公告)日：2014-09-30
申请号：US13158145
申请日：2011-06-10
申请人： Yunping Lang , Huijie Zhao , Huafei Ding
发明人： Yunping Lang , Huijie Zhao , Huafei Ding
CPC分类号： H03F3/217 , H03F1/30 , H03F1/301 , H03F1/342 , H03F3/183 , H03F3/2173 , H03F2200/153 , H03F2200/351 , H03F2200/459
摘要： The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.
摘要翻译： 本技术一般涉及一种闭环功率级和包括该功率级的音频放大器电路。 本技术还提供了一种用于控制放大器电路的方法。 闭环功率级被配置为接收具有第一频率和第一占空比的PWM输入信号，电源电压和与电源电压相关的偏置信号，并且输出具有 第二频率和第二占空比。 闭环功率级包括反馈回路，其被配置为响应于电源电压的变化来调节方波信号的第二占空比。 包括闭环功率级的音频放大器电路可以具有稳定的输出电压，因此具有良好的电源抑制性能。
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公开(公告)号：US20110305353A1
公开(公告)日：2011-12-15
申请号：US13158145
申请日：2011-06-10
申请人： Yunping Lang , Huijie Zhao , Huafei Ding
发明人： Yunping Lang , Huijie Zhao , Huafei Ding
CPC分类号： H03F3/217 , H03F1/30 , H03F1/301 , H03F1/342 , H03F3/183 , H03F3/2173 , H03F2200/153 , H03F2200/351 , H03F2200/459
摘要： The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.
摘要翻译： 本技术一般涉及一种闭环功率级和包括该功率级的音频放大器电路。 本技术还提供了一种用于控制放大器电路的方法。 闭环功率级被配置为接收具有第一频率和第一占空比的PWM输入信号，电源电压和与电源电压相关的偏置信号，并且输出具有 第二频率和第二占空比。 闭环功率级包括反馈回路，其被配置为响应于电源电压的变化来调节方波信号的第二占空比。 包括闭环功率级的音频放大器电路可以具有稳定的输出电压，因此具有良好的电源抑制性能。
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