Constructing a "perfect" current meter

Discussion in 'Homework Help' started by Velocity, Apr 6, 2009.

  1. Velocity

    Thread Starter Member

    Feb 27, 2009
    14
    0
    All right guys, this one is coming straight from The Art of Electronics... I have to use a 411 op-amp and a 1mA meter to construct a "perfect" current meter (with zero input impedance) and with 5ma full-scale. The meter would never be driven more than ±150% full scale... assume the 411 swings to ±13V (±15V supply), and the meter has a 500Ω internal resistance.

    I don't even know where to start on this one (except with the op-amp being there... that I know :D).
     
  2. Thevenin's Planet

    Active Member

    Nov 14, 2008
    183
    1
    Ahhhh....What will be doing the reading , analog or digital ?:cool:

    GMT -7
     
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