Page 25 - Op Amps Design, Applications, and Troubleshooting
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8 BASIC CONCEPTS OF THE INTEGRATED OPERATIONAL AMPLIFIER
FIGURE 1.5 Estimate the effect on circuit operation if R 3 were to become
open.
Kirchhoff's Current Law can also be used to analyze AC circuits with reac-
tive components provided the circuit values are expressed in complex form.
1.2.3 Kirchhoff's Voltage Law
Kirchhoff's Voltage Law basically says that all of the voltage sources in a closed
loop must be equal to the voltage drops. That is, the net voltage (sources + drops)
is equal to zero. Figure 1.6 shows some examples. This law is most often stated
mathematically in a form such as
FIGURE 1.6 Examples of Kirchhoff s Voltage Law illustrate the sum of ail voltages
in a closed loop must equal zero.
