This is a circuit for signal injector circuit that is important tool for troubleshooting your electronic circuits. As an example, this circuit can be used to test amplifier circuit. This is the figure of the circuit;
This circuit also a lot of harmonics. By connecting the ground clip to the 0v rail and move through each stage, starting at the speaker, the fault in an amplifier can be found. At each preceding stage, the volume will increase. This circuit can inject FM sound sections in TV’s and the IF stages of radios.
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