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
    • 4. 发明申请
    • AMPLIFIER CIRCUITRY, INTEGRATED CIRCUIT AND COMMUNICATION UNIT
    • 放大器电路,集成电路和通信单元
    • WO2010076672A1
    • 2010-07-08
    • PCT/IB2009/051969
    • 2009-01-05
    • FREESCALE SEMICONDUCTOR, INC.ODDOART, LudovicLE MEN, Berengere
    • ODDOART, LudovicLE MEN, Berengere
    • H03F3/217H03F1/02H03F1/30
    • H03F3/2173H03F1/0205H03F1/304H03F3/217H03F2200/03H03F2200/331H03F2200/453H03F2200/459
    • Amplifier circuitry (312) comprising a class-D amplifier for amplifying an audio input signal (420). The amplifier circuitry (312) comprises sigma-delta modulation logic (410) arranged to receive the audio input signal (420) and to generate a modulated signal (415) representative of the audio input signal (420), and an output stage (430) arranged to generate an output signal (435) for the amplifier circuitry (312). The amplifier circuitry (312) further comprises finite impulse response, filter logic (450) operably coupled between the modulation logic (410) and the output stage (430), and having at least one zero in its transfer function arranged to substantially pass signal components within the modulated signal (415) occurring at frequencies less than the at least one zero and to attenuate signal components within the modulated signal (415) at frequencies greater than the at least one zero.
    • 放大器电路(312)包括用于放大音频输入信号(420)的D类放大器。 放大器电路(312)包括被设置为接收音频输入信号(420)并产生代表音频输入信号(420)的调制信号(415)的Σ-Δ调制逻辑(410),以及输出级 ),用于产生放大器电路(312)的输出信号(435)。 放大器电路(312)还包括可操作地耦合在调制逻辑(410)和输出级(430)之间的有限脉冲响应,滤波器逻辑(450),并且其传递函数中至少有一个零排列成基本上传递信号分量 在调制信号(415)内以小于至少一个零的频率发生,并且以大于至少一个零的频率衰减调制信号(415)内的信号分量。