Pulse Induction Metal Detectors. How do they work? Part 4: Final gain stage. LTspice analysis.
Автор: Electronics ain't easy
Загружено: 2024-11-07
Просмотров: 690
In this 4th installment of my simulation series about pulse induction metal detectors, I am talking about the final gain stage right after the samping integrator stage.
Now, the interesting part is the threshold which controls whether the signal from the sampling integrator gets amplified or "nullified". In real life, the metal detectorist would turn his/her metal detector and adjust the threshold pot so that the audio tone (more or less, the sampling integrator output) is barely audible. When a target is detected, that audio tone is supposed to get louder.
This threshold kinda offsets the output voltage all over the range between batt+ and batt-.
Link to LTspice simulation file: https://drive.google.com/file/d/1U4_E...
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