/diy/ - Do It Yourself

Anonymous Sat Oct 12 00:08:29 2019 No.1697646 [View]
File: 50 KB, 1692x903, filter.png [View same] [iqdb] [saucenao] [google]

>>1697544
>>1697550

Ok so I upped the capacitance on the DC cap to the recommended 100pF. I tested the circuit as pictured with 1 and 4 pf caps and got the expected/desired filtering where 4pf had a lower cut off than 1pf. When I tried the varicap at .01V applied I still got the same integrating behavior as if it was going straight to ground, even though I would expect it to be similar to the 4pf cap.

At this point it seems like there must be some error in the way I'm wiring the varicap. Thanks for the help so far

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/diy/ - Do It Yourself

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