Kapanadze Cousin - DALLY FREE ENERGY

John.K1 · February 10, 2016, 06:08:04 AM

Hi Varpies, yep, you are right 15pF Vs 10nF, my bad- This brings out the question - If I connect a 1pf capacitor on the gate- is it like two caps in series? --> (1*10000)/(1+10000) ==> C=0.99 pF ?

Jeg · February 10, 2016, 08:41:36 AM

Quote from: John.K1 on February 10, 2016, 06:08:04 AM
Hi Varpies, yep, you are right 15pF Vs 10nF, my bad- This brings out the question - If I connect a 1pf capacitor on the gate- is it like two caps in series? --> (1*10000)/(1+10000) ==> C=0.99 pF ?

Capacitor voltage divider. The 1pf cap will be charged quickly to the maximum voltage, and gate capacity will take zero volts. So it won't open.

verpies · February 10, 2016, 09:11:05 AM

Quote from: John.K1 on February 10, 2016, 06:08:04 AM
If I connect a 1pf capacitor on the gate- is it like two caps in series? --> (1*10000)/(1+10000) ==> C=0.99 pF ?

Where do you connect the second terminal of this capacitor?

John.K1 · February 10, 2016, 10:05:23 AM

Quote from: verpies on February 10, 2016, 09:11:05 AM
Where do you connect the second terminal of this capacitor?

You tell me, I know sh..t about electronics

I don't know- to SG?, or parallel with the 10K resisor to ground???

Anyway, Happy days, I got today my 7" LCD for my Rapsberry , so together with my 2Ch FeelTech SG and my program I can put it in to the box as a Standalone resonance searcher -tunner. It generates on two outputs all combination of frequencies and duty cycles (steps set via my user interface) and collect info from the current probe. If there is any "Magic" combination - it will find it

verpies · February 10, 2016, 10:40:19 AM

Quote from: John.K1 on February 10, 2016, 10:05:23 AM
You tell me, I know sh..t about electronics I don't know- to SG?, or parallel with the 10K resisor to ground???

If one cap terminal is connected to the MOSFET's gate and the other terminal to the SG, then this capacitor is in series with the gate capacitance and Jeg's answer is correct.