会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • HIGH EFFICIENCY CLASS D AMPLIFIER WITH REDUCED GENERATION OF EMI
    • 具有降低EMI产生的高效级D放大器
    • US20160329868A1
    • 2016-11-10
    • US14715879
    • 2015-05-19
    • STMicroelectronics (Shenzhen) R&D Co. Ltd
    • Qi Yu LiuHong Wu Lin
    • H03F3/217H03F3/45H03F3/183
    • H03F3/183H03F3/217H03F3/2171H03F3/2173H03F3/45475H03F2200/03H03F2203/45138
    • A class-D amplifier includes a signal processing block. The signal processing block generates a first processed signal representing a difference between a first differential signal and a second differential signal, when a duty cycle of the first differential signal is greater than that of the second differential signal. The signal processing block generates the first processed signal representing a reference DC level, when the duty cycle of the first differential signal is less than that of the second differential signal. A second processed signal representing a difference between the second differential signal and the first differential signal is generated when the duty cycle of the second differential signal is greater than that of the first differential signal, and the second processed signal representing the reference DC level is generated when the duty cycle of the second differential signal is less than that of the first differential signal.
    • D类放大器包括信号处理块。 当第一差分信号的占空比大于第二差分信号的占空比时,信号处理块产生表示第一差分信号和第二差分信号之间的差的第一处理信号。 当第一差分信号的占空比小于第二差分信号的占空比时,信号处理块产生表示参考DC电平的第一处理信号。 当第二差分信号的占空比大于第一差分信号的占空比时,产生表示第二差分信号和第一差分信号之间的差的第二处理信号,并且生成表示参考DC电平的第二处理信号 当第二差分信号的占空比小于第一差分信号的占空比时。
    • 6. 发明申请
    • SILENT START CLASS-D AMPLIFIER
    • 静音启动类D放大器
    • US20140285258A1
    • 2014-09-25
    • US14199773
    • 2014-03-06
    • STMicroelectronics (Shenzhen) R&D Co. Ltd.
    • Ru Feng DuQi Yu Liu
    • H03F3/217
    • H03F3/2171H03F3/2175
    • A Class-D amplifier includes a pre-amplifier having an input configured to receive an amplifier reference voltage signal which is ramped at start-up at a fast rate. An integrator has a first input configured to receive an input signal from the pre-amplifier and a second input configured to receive an integrator reference voltage signal which is ramped at start-up at a slower rate. A modulator has an input coupled to an output of the integrator. The modulator generates a pulse width modulated output signal. Operation of the Class-D amplifier is controlled at start-up by applying a slow ramped signal as the integrator reference voltage signal and a fast ramped signal as the amplifier reference voltage so that the pulse width modulated output signal exhibits an increasing change in duty cycle in response to an increasing voltage of the integrator reference voltage signal, and no “pop” is introduced at start-up.
    • D类放大器包括前置放大器,其具有被配置为接收在启动时以快速速率斜坡的放大器参考电压信号的输入。 积分器具有被配置为从前置放大器接收输入信号的第一输入和被配置为接收以较慢速率在启动时斜坡上升的积分器参考电压信号的第二输入。 调制器具有耦合到积分器的输出的输入。 调制器产生脉宽调制输出信号。 通过将缓慢斜坡信号作为积分器参考电压信号和快速斜坡信号作为放大器参考电压来控制D类放大器的工作,使得脉宽调制输出信号在占空比上呈现增加的变化 响应于积分器参考电压信号的增加的电压,并且在启动时不引入“弹出”。