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
    • 2. 发明授权
    • Half-bridge three-level PWM amplifier and audio processing apparatus including the same
    • 半桥三电平PWM放大器和音频处理装置包括相同
    • US08362832B2
    • 2013-01-29
    • US12850782
    • 2010-08-05
    • Bong-Joo KimWang-Seup YeumYong-Hee LeeSeung-Bin YouChun Kyun Seok
    • Bong-Joo KimWang-Seup YeumYong-Hee LeeSeung-Bin YouChun Kyun Seok
    • H03F3/38
    • H03F3/2173H03G3/007
    • A half-bridge three-level pulse width modulation (PWM) amplifier includes a prescaling unit, a PWM generator configured to convert the input signal to a three-level PWM signal having a first level, a second level and a reference level and an output stage. The prescaling unit scales an input signal according to at least one gain value to provide a scaled signal. The PWM generator varies the width of pulses having the first level and varies the width of pulses having a second level based on the scaled signal. The output stage drives an output node to a level of a first power supply voltage, a second power supply voltage or a third power supply voltage based on the three-level PWM signal. The output node is connected to a load. The magnitude of the at least one gain value compensates for variations of power supply voltages.
    • 半桥三电平脉宽调制(PWM)放大器包括一个预分频单元,一个PWM发生器,被配置为将输入信号转换成具有第一电平,第二电平和参考电平的三电平PWM信号,以及输出 阶段。 预分频单元根据至少一个增益值缩放输入信号以提供缩放信号。 PWM发生器改变具有第一电平的脉冲的宽度,并且基于缩放的信号改变具有第二电平的脉冲的宽度。 输出级基于三电平PWM信号将输出节点驱动到第一电源电压,第二电源电压或第三电源电压的电平。 输出节点连接到一个负载。 至少一个增益值的大小补偿电源电压的变化。
    • 7. 发明授权
    • Analog front end circuit and method of compensating for DC offset in the analog front end circuit
    • 模拟前端电路和模拟前端电路补偿直流偏移的方法
    • US06985098B2
    • 2006-01-10
    • US10844750
    • 2004-05-13
    • Yong-Hee Lee
    • Yong-Hee Lee
    • H03M1/10
    • H03F1/304H03F2200/375H03M1/1019H03M1/12
    • DC offset is compensated for in an analog front end (AFE) circuit having an amplifier and an analog-to-digital converter (ADC). First data processed by the ADC are low pass filtered and estimated DC offset data of the ADC are obtained in ADC DC offset calibration mode. Second data processed by the ADC and the amplifier are low pass filtered, and a first DC offset of the ADC are substantially removed from the filtered second data by subtracting the estimated DC offset data from the filtered second data, thereby obtaining second compensated DC offset data of the amplifier in an amplifier DC offset calibration mode. The second compensated DC offset data is iteratively improved and first compensated DC offset data of the amplifier are obtained. The first compensated DC offset data are transformed into an analog signal, and the analog signal is subtracted from an input signal of the amplifier during operation mode.
    • 在具有放大器和模数转换器(ADC)的模拟前端(AFE)电路中补偿DC偏移。 由ADC处理的第一个数据是低通滤波的,ADC的ADC偏移校准模式获得ADC的估计直流偏移数据。 由ADC和放大器处理的第二数据被低通滤波,并且通过从经滤波的第二数据中减去估计的DC偏移数据,从滤波后的第二数据基本上去除了ADC的第一DC偏移,从而获得第二补偿的DC偏移数据 的放大器在DC偏移校准模式下。 迭代地改善第二补偿DC偏移数据,并且获得放大器的第一补偿DC偏移数据。 将第一补偿DC偏移数据变换为模拟信号,并且在运行模式期间从放大器的输入信号中减去模拟信号。