Output Impedance Analysis
Notes:
A similar technique to measuring input impedance is employed for output impedance analysis. A current source is used, wired in parallel with the load
resistor, or point in the circuit where analysis is required, with a fixed magnitude of 1 amp. A shunt resistance is not required as the load resistor
Rl is in parallel with the current source. From Ohm's Law V=I*Z as the current source is set to 1 amp then in this case the magnitude of voltage
will equal the impedance. An ac analysis is then performed, the y-axis, which will indicate voltage, now also correctly reads impedance and is
labelled accordingly. A linear scale for the y-axis is also used, results for the above circuit are displayed below:
Note:
This technique is not needed with Tina Pro as an impedance meter is already included. Also this method is computed in seconds compared
to conventional meter methods.