i was doing some basic tests with a schottky diode, without succes, so finally i've decided to ask for some help, since i'm sure missing something important about the theory.
I have put up a circuitry like in the picture attahced
I would try to rectify the reduced 125 Khz signal. Due to the 125 Khz frequency, i've decide to use a schottky diode (don't know if the choice is appropriate), so i was expecting to see in his cathode a only-positive pulsed half-wave. Instade i continue to see by oscilloscope a complete sinusoidal wave.
What kind of diode are you using? Diode capacitance can cause this. If you are using a high-current diode (high capacitance), then you need a low-value resistor as a load. You apparently are using an oscilloscope. The input resistance is much too high.
Yes, the input resistance of the scope is very high, like more than 1 Mohm. You need to load the right side of the diode with a resistor to get what you want. Resistor value should be much more than the values of those two on the left, but not nearly as high as 1 Mohm.
sorry for incomplete data, the diode i'm using now is 1N5819, but i eventually can buy another one i need in 5 minutes from my home.
Yesterday i've imagine something about it, looking some diagrams here and there, so i've try to load the right part with a 33K resistor, but i can't measure anything anymore at the cathode, 0 level always.
sorry for incomplete data, the diode i'm using now is 1N5819, but i eventually can buy another one i need in 5 minutes from my home.
Yesterday i've imagine something about it, looking some diagrams here and there, so i've try to load the right part with a 33K resistor, but i can't measure anything anymore at the cathode, 0 level always.
values of my voltage divider are 10M and 2,2M. Actually i'm just wandering how i can see the positive-only signal i was expecting, with negative part cutted by the diode, and then if possible to have a DC from this signal, using a capacitor.
How about **broken link removed**? Pie in the sky, of course.
Schottky diodes made on these epitaxial diamond films have breakdown voltages >6 kV, twelve times the highest breakdown voltage reported for any diamond diode and higher than any other semiconductor Schottky diode.
I know. I just couldn't resist.
I got a thanks and a balanced rep for this thread. What does a balanced rep mean? I suppose it is open to interpretation by the repper.
No one ever pos reps me here And I've got almost 400 posts. Hrmph.
On my other forum I've got mad rep. I got +3 in one day in recognition for calling the Iowa caucuses dead on (it's a politics/religio-stuff forum, so I won't mention any more here).
But seriously, do Schottky's generally fail as a dead short? My power supply was current limiting at 12.5A at a few tenths of a volt after it went.