How is the output impedance related to the input impedance?
The output voltage from the source is developed across the input impedance of the destination (often called the load impedance, or simply the load), and therefore the signal voltage is passed from source to destination. However, the input and output impedances will also affect the current that flows around the circuit too.
How does impedance affect the power transfer system?
In a matched system like this we have the ideal power transfer arrangement, but the output voltage from the source device is shared equally across both the output and input impedances (assuming negligible cable effects).
How does the impedance method eliminate the differential equation?
The impedance method allows us to completely eliminate the differential equation approach for the determination of the response of circuits. In fact the impedance method even eliminates the need for the derivation of the system differential equation.
How does the impedance of a cable affect sound?
The output impedance of a device and the capacitance of its connecting cable form a simple first-order low-pass filter, producing a 6dB/octave attenuation above a certain frequency. However, you need either quite a low output impedance or quite a long high-capacitance cable to bring the turnover of this filter into the audio band.
Do you have to have a matched impedance system?
For these reasons, there is no technical requirement for impedance matching. Secondly, it is common in studios to want to distribute one output signal to several device inputs (say, one mixer output to several tape recorder inputs), and there are problems with doing this within matched-impedance systems.
What does the impedance of an op amp mean?
This means that regardless of the amount of current drawn by an external load, the output voltage of the op amp remains unaffected. That is, no loading occurs. In the case of a practical op amp, there is some amount of output impedance. The ideal output voltage is divided between this internal resistance and any external load resistance.