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Circuit Theorems and Conversions
Referring to the given circuit, determine VTH and RTH if a 68 Ω resistor is connected in parallel across R2 and R3.
3.3 V, 148 Ω
330 mV, 148 Ω
3.3 V, 68 Ω
330 mV, 68 Ω
Correct Answer:
3.3 V, 148 Ω
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Circuit Theorems and Conversions
A practical voltage source has a nonzero internal resistance.
Some circuits require more than one voltage or current source.
You cannot convert a voltage source to an equivalent current source, or vice versa.
Transistors act basically as voltage sources.
Norton's equivalent current (IN) is an open-circuit current between two points in a circuit.
Conversions between delta-type and wye-type circuit arrangements are useful in certain specialized applications.
An ideal current source has zero internal resistance.
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A practical current source has a finite internal resistance.
The Thevenin equivalent voltage (VTH) is the short-circuit voltage between two terminals in a circuit.
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