All Questions
31
questions
0
votes
0
answers
33
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Double pulse testing the first transients on the current
I would like to comprehend what represents the first pulse on the ID current of the LS and HS in double pulse test configuration. I have the circuitry as shown:
LS is my active switch, when I turn ...
- 71
1
vote
4
answers
181
views
Reducing the fall-time of a P-channel MOSFET
I have implemented the following circuit in hardware.
My required output across load (R7) is a pulsed signal of 20 V, 100 kHz, 10% duty cycle (10 us pulse width and ON-time of 1us and OFF-time of 9 us)...
2
votes
2
answers
277
views
The input to the gate of an N-channel MOSFET is a pulsed signal but I am getting a ramp signal
I am trying to generate an output voltage of minimum 30V and maximum 50V, current of minimum 10A for a load of 2-10ohms using a MOSFET.
I am connecting an NPN transistor's collector to the gate of the ...
0
votes
1
answer
151
views
How to get rid of glitch?
I have designed simple P-channel MOSFET circuit. It works well, but when low source power is applied (1 V), a glitch occurs in the output signal.
I tried R, L and C component, but it didn't work.
What ...
- 11
1
vote
1
answer
92
views
What component is needed to collect injector pulse?
I am planning to convert this pulse to a digital signal (apx. 5 V for MCU input) based on voltage level. The maximum voltage of this pulse is 12 V when the injector nozzle is closed and 0 V otherwise. ...
- 23
2
votes
1
answer
381
views
Why does a MOSFET or IGBT's surge current rating stop increasing with decreasing pulse width beyond a point, unlike thyristors?
Thyristor
The surge current rating of a thyristor increases as the width of the pulse decreases. For a single non-repetitive pulse, it's not uncommon for a thyristor to have a surge rating that is 10x ...
- 7,218
0
votes
1
answer
54
views
How can use grounded primary coil transformer with BGJ/MOSFET
So, I have a pulse signal transformer like this (freq is 1MHz):
In the secondary coil I want to get bipolar pulses. How can I make it using BJT or MOSFET switches and wich is better?
I know, that ...
- 15
0
votes
0
answers
93
views
Strange pulse with N-MOSFET switching Raspberry Pi power supply
My schematic is as follows:
5 volts coming from a lab power supply (10 amperes.)
Looking at the voltage input with an oscilloscope, I see this:
A strange pulse going up to 5.08 volts every 500 ms, ...
- 33
3
votes
3
answers
4k
views
How to build an arbitrary (one-shot) pulse generator?
I need a circuit/IC that can generate a single pulse with a variable pulse width (I would want a minimum of 50 ns but if that is not possible the next minimum can be 1 μs, and even if that is not ...
- 314
3
votes
1
answer
2k
views
MOSFETs in high voltage low current applications
I am constructing a circuit designed to release a very brief pulse of current at a voltage of 1000V. A low power DC converter is used to charge a 0.1uf pulse capacitor to 1000V, and then I intend to ...
- 71
2
votes
3
answers
524
views
Why does the PMOS burn out in a buck boost converter when I increase the power supply voltage?
My MOSFET warms up and even burns out when I change the power supply
to 8V. I get an input current of 1A , and the MOSFET burns.
This is the datasheet.
I dont know why. I have an IRF9540n MOSFET.
...
- 61
2
votes
0
answers
285
views
Fast switch rise time techniques
This question is continuation of this question: High Frequency Square Wave Generator
I am trying to drive a 400V supply and 50ohm load with an RF MOSFET which has a rise time of 3-4 ns and fall time ...
- 79
0
votes
4
answers
306
views
Drop-out pulse test
I have a switching MOSFET circuit.
Input to the switching MOSFET circuit is 11V at the drain.
The gate is connected to a function generator. 5V peak-peak, frequency = 1kHz, 1ms (time period) & ...
user220456
2
votes
5
answers
717
views
pulsed current with 200 kHz squarewave signal
I use this circuit to obtain pulses as close as possible to the input signal pulses on the 1.5 Ohms resistor. The MOSFET is FPQ50N06 and the transistor is BC239. The circuit gives good results on 25 ...
- 21
0
votes
0
answers
121
views
Wiring a Mosfet for Pulses
BACKGROUND:
For sometime now I've been in need of a pulsed power supply that can put out 200 V pulses with a minimum pulse width of 400 nS. After researching effective switching devices, I decided ...
- 41