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RESISTOR-BASED SIGMA-DELTA DAC

机译:基于电阻的SIGMA-DELTA DAC

摘要

An inverter-driven resistor-ladder digital-to-analog (DAC) converter includes a resistor-ladder network that comprises a resistor for each bit signal of a multi-bit input signal. Each resistor of the resistor-ladder network comprises an input end and an output end. The input end of each resistor is coupled to a corresponding bit signal of the multi-bit input signal, and the output end of each resistor is coupled to an output node of the resistor-ladder network. An output voltage is generated at the output node that is based on the multi-bit input signal. In one exemplary embodiment, the multi-bit input signal is a sigma-delta (ΣΔ) modulated multi-bit input signal. In another exemplary embodiment, resistance values of the resistors of the resistor-ladder network are related by a binary weighting. In still another exemplary embodiment, resistance values of the resistors of the resistor-ladder network are substantially equal.
机译:逆变器驱动的电阻梯数模(DAC)转换器包括电阻梯网络,该电阻梯网络包括用于多位输入信号的每个位信号的电阻。梯形电阻网络的每个电阻包括一个输入端和一个输出端。每个电阻器的输入端耦合到多位输入信号中的对应位信号,并且每个电阻器的输出端耦合到电阻梯网络的输出节点。基于多位输入信号在输出节点上生成输出电压。在一个示例性实施例中,多位输入信号是∑-Δ(∑Δ)调制的多位输入信号。在另一示例性实施例中,电阻梯网络的电阻的电阻值通过二进制加权来关联。在又一示例性实施例中,梯形电阻网络的电阻器的电阻值基本相等。

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