Page 111 - Op Amps Design, Applications, and Troubleshooting
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94 AMPLIFIERS
FIGURE 2.24 Thevenin's Theorem is used to simplify the summing network for the rtoninverting
summing amplifier.
originally shown in Figure 2.23 can be replaced by the Thevenin equivalent circuit
shown in Figure 2.24(c). This substitution is shown in Figure 2.25.
We can now complete our analysis of the simplified circuit by applying tech-
niques presented for the basic noninverting amplifier.
Voltage Gain. The voltage gain of the circuit in Figure 2.25 can be computed
with the noninverting amplifier gain formula given in Equation (2.28).
