This injector circuit generates signals in both HF and AF range. This wideband capability is very helpful in troubleshooting jobs to isolate the malfunctioning stage.
The circuit is constructed using 6 inverter gates inside the single IC 7414. The six gates are wired as astable multivibrators and generate a squarewave signal with
The given component values produce the frequencies: 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz, and 10 MHz.
Parts Placement Layout
Typical troubleshooting technique using a signal injector. You must begin at the endstage injecting the signal systematically from stage to stage going towards the input stage.
Electronic Circuits volume 1.0 - Circuit Nr. 68
The complete data of the electronic circuit described above can be found in the following book and is available from Amazon.com.
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