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by rcbart on April 13th, 2004

rcbart

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What is "negative" voltage?

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  • by AntRn1 on June 6th, 2006

    AntRn1

    Operational amplifier circuits often use two separate supplies
    A positive supply and an equal, but opposite, negative supply.
    The common connection to these two supplies acts as the common 0V rail and the input and output voltages are usually measured relative to this rail

    If you take two 1.5V DC cells and place them in series with each other the total voltage = 3V. If you go between the centre point and the positive rail it will read +1.5V, now move the positve connection of your multimeter to the negative side of the series pack and it will read -1.5V. In other words the voltage is negative with respect, or the current is flowing round the circuit in the opposite direction

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    • Thanks. can you scroll down and see what you think about my negative voltage issue (with screen shot)?

      Remmik

      by Remmik on December 24th, 2011

    1 comment | Post one | Permalink

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