DC Network Theorems Unit 8 – Thevenizing a Bridge Circuit
Exercise 1 – Bridge Circuit Resistance
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to calculate the Thevenin resistance
(RTH) of a bridge circuit. You will verify your results by comparing calculated and measured
data.
DISCUSSION
- An unloaded bridge circuit is equivalent to 2 parallel voltage dividers.
- The Thevenin voltage is the difference between the voltages of the 2 parallel voltage
dividers. - The Thevenin resistance of the bridge is the resistance across the output terminals when the
input is shorted.