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利用外部电阻减小电位器负载

消耗积分:0 | 格式:pdf | 大小:27 KB | 2012-03-08

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Abstract: This article discusses how to improve linearity (due to loading of the wiper) and mid-range frequency response of a digitalpotentiometer in VCO control applications by adding a single external resistor between H and W.Digital potentiometer ICs (digital pots, or digipots) are convenient for controlling voltage-controlled devices such as VCOs and as aneconomical alternative for a DAC. In a typical application (Figure 1), a MAX5160 digipot controls the frequency of a VCO, via a 3-wire interface.
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