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Weighted Addition

Weighted addition of signals entails only a slight extension to our previous circuit and analysis. The new circuit is shown in Figure 6.

Figure 6:  A Weighted Adder

Here notice that since the same ground rules for op-amps apply, the feedback current must equal the sum of the input currents. (Remember that some of these currents may be negative.)




Brian L. Stuart
Fri Mar 14 11:57:03 CST 1997