Practical Audio Electronics by Robinson Kevin;

Author:Robinson, Kevin;
Language: eng
Format: epub
Publisher: Taylor & Francis Group
Published: 2020-04-15T00:00:00+00:00

Example

As a simple example of the application of these rules consider the circuit shown in Figure 12.9. Equipment A is to be connected via a cable to equipment B. However the output and input impedances do not match and so resistors R1 and R2 are inserted at the output of equipment A as shown. The task is to ensure that the modified output impedance seen by equipment B has the correct value.

Figure 12.9 Series and parallel law example.

Equipment B looking back down the cable sees the combined impedance of R1, R2, and Rout the output impedance of equipment A, but how do these three impedances combine? First it is necessary to add R1 and Rout in series.

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