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Posts posted by dkilshaw

  1. sorry to be thick but cant see how to make a current source

    Ive thought about this a bit longer and assume the following

    Remove all points of P1 then put a current source into R8 referenced to ground so put current source accross pin 12 & 10

    And in ref to current source I assume the PNP is on the output of the opamp and the load in the collector leg of the line and the emmiter is fed back to the neg input of the op amp, potential divider on the positive input to the op amp

    If this is the case can do i need to use a split rail supply to the op amp ? I would prefer not as this standard PSU circuit negates the need for one

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