This is very, very embarrassing for me. I'm supposed to be past this sort of basic level of knowledge. But I just can't wrap my head around understanding how this circuit works.
At first sight, I would've said that it shouldn't really work at all, and that current should be flowing through D2 back into V1, which is an undesirable condition. But the sims says otherwise:
If I were to change D1 and D2 to ordinary 1N914 diodes, the sim behaves more or less as I expected it would. Current would flow through D2 into V1.
But not if they're schottky diodes, in this case, only small current peaks through D2 are happening during rise and fall of the input square wave. But current through D1 goes from -25 uA to -90 uA between pulses.
There's obviously something I'm not understanding about schottky diodes here...
What gives? Why is current flowing the way it is? Why is the 12V pulse not feeding itself into V1 through D2?
At first sight, I would've said that it shouldn't really work at all, and that current should be flowing through D2 back into V1, which is an undesirable condition. But the sims says otherwise:
If I were to change D1 and D2 to ordinary 1N914 diodes, the sim behaves more or less as I expected it would. Current would flow through D2 into V1.
But not if they're schottky diodes, in this case, only small current peaks through D2 are happening during rise and fall of the input square wave. But current through D1 goes from -25 uA to -90 uA between pulses.
There's obviously something I'm not understanding about schottky diodes here...
What gives? Why is current flowing the way it is? Why is the 12V pulse not feeding itself into V1 through D2?
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