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Variable Power Supplies Circuitry

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    Last Modified: May 14, 2018

    The NI ELVIS III provides a one positive and one negative variable power supply. The positive supply can provide adjustable output voltage from +1 V to +15 V and negative supply can provide -15 V to -1 V.

    Digital-to-Analog Converter

    The NI ELVIS III gets the set point from the Variable Power Supply SFP. A DAC is used to convert the digital set point to the control voltage.

    Amplifier

    The amplifier stage scales the control voltage of the DAC output to the correct adjust voltage, which is the input of the regulation loop.

    Power Converter

    The amplifier output, power converter, and its output construct the regulation loop that produces the required output voltage and keeps it stable.

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