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    • 4. 发明申请
    • CAPACITIVE LEVEL SHIFTING FOR ANALOG SIGNAL PROCESSING
    • 用于模拟信号处理的电容水平移位
    • US20070139244A1
    • 2007-06-21
    • US11313549
    • 2005-12-20
    • Jay Kuhn
    • Jay Kuhn
    • H03M1/12
    • H03M1/1061H03M1/361
    • An analog processing block is arranged to receive an input signal through an AC coupling circuit. A digitally programmable voltage reference (DPVR) circuit is arranged to provide selection of a voltage reference that is DC coupled through a high impedance circuit to the AC coupling circuit. The input to the analog processing block includes the AC coupled input signal and the DC level from the selected voltage reference such that the DC level is effectively shifted for the analog processing block. The analog processing block may include any number of analog functions including: buffering, level shifting, scaling, integrating, and analog-to-digital conversion for digital signal processing, to name a few. A digital control logic circuit and a trim map can be arranged to control adjustments to the DPVR such that the effects of any non-ideal conditions on the analog processing block are minimized. The trim map may include non-volatile memory devices.
    • 模拟处理块被布置成通过AC耦合电路接收输入信号。 数字可编程电压基准(DPVR)电路被布置成提供通过高阻抗电路直流耦合到AC耦合电路的电压参考的选择。 对模拟处理块的输入包括AC耦合的输入信号和来自所选电压基准的DC电平,使得对于模拟处理块有效地移位DC电平。 模拟处理块可以包括任何数量的模拟功能,包括:数字信号处理的缓冲,电平转换,缩放,积分和模数转换,仅举几个例子。 可以布置数字控制逻辑电路和修剪图以控制对DPVR的调整,使得任何非理想条件对模拟处理块的影响最小化。 修剪图可以包括非易失性存储器件。