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Resistance calibration method without external precision elements

机译:无需外部精密元件的电阻校准方法

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A method of resistance calibration without external precision elements usage presented in paper. In the proposed method, used structures which operation based on technologically accurate elements and signals to have high accuracy resistance after calibration. Architecture produces a calibration code corresponding to 50Ohms PVT compensated termination impedance, which is needed to avoid reflections in transmission lines. Standard calibration methods using external ~1% accuracy precision discreet resistance (50 or 200Ohms). The presented calibration mechanism using internal elements and can provide ~ 4-7% accuracy of calibration. Method can be used in the special input/output circuits of several standards such as Peripheral Component Interconnect (PCI), Universal Serial Bus (USB), Double Data Rate (DDR) etc.
机译:本文提出了一种无需使用外部精密元件的电阻校准方法。在提出的方法中,所使用的结构在校准后基于技术上精确的元素和信号进行操作以具有较高的精度。架构会产生一个与50Ohms PVT补偿的终端阻抗相对应的校准码,这是避免传输线反射所必需的。使用外部精度约为1%的精密分立电阻(50或200Ohms)的标准校准方法。提出的使用内部元件的校准机制可以提供约4-7%的校准精度。该方法可用于几种标准的特殊输入/输出电路,例如外围组件互连(PCI),通用串行总线(USB),双倍数据速率(DDR)等。

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