All Questions
12
questions
3
votes
2
answers
295
views
Output with programmable rise time
I am tinkering with a device to generate pulses for a measurement setup.
No need to buy it: Just wondering how one would implement it.
Idea:
Device generates a square-wave (Vpp and DC-offset) output ...
- 3,509
0
votes
2
answers
458
views
What rise time should pulse have to have desired pulse width [closed]
I have a question regarding my high speed laser driver. I want to have 10ns width pulse. What rise/fall time I would need to have that I can say I still have 10ns pulse. Is there any percentage that ...
1
vote
2
answers
763
views
Very short rise and fall time with relay
My question is related to the question here. I need very fast rise and fall time (below 2ns) and pulse width of 50ns. Load is 50ohm and voltage is 250V. I have achieved the rise time with a mercury ...
- 79
1
vote
0
answers
306
views
Fast rise time reed relay
I am currently working on a project related that I asked before here. The purpose is to have 2ns rise time 30ns pulse width at 250V (with 50ohm load). Repetition is 30hz.
I tried avalanche transistor ...
- 79
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
1
answer
96
views
FRR Measurement
When I try to measure the FRR (time delay in the rising edge of two pulses) between two channels of a GES-2074A GW-Instek digital oscilloscope, it varies depending on the time resolution. First, I ...
- 101
2
votes
1
answer
3k
views
High voltage nanosecond pulse generator
I am trying to build a PCB based pulse generator that can produce a pulse with a width of about 100 ns and 500V-1000V peak amplitude to a 50 ohm resistive load. I will use the circuit for burst pulse ...
- 73
1
vote
0
answers
60
views
Generate ultrashort rise times with photoconductive switch or photodiode
I am trying to produce voltage pulses with very short rise time (<15 ps), medium width (20 ns) and amplitudes up to 15 V. As a promising candidate I selected photoconductive switches and ultrafast ...
- 121
1
vote
2
answers
837
views
Rising edge of a pulse or one complete pulse needed for 1 step in Stepper motor?
I'm trying to make a step counter using Hall effect sensor implanted near the rotor of a common hybrid-synchronous(1.8° in full step) stepper motor, and I'm confused as I'm not able to figure out when ...
- 345
1
vote
1
answer
254
views
Pen-type barcode scanner
I am designing a pen-type barcode scanner (1D) which is operated by user, which means that the speed at which the scanner moves is random. Even worse is that it gets stuck sometimes, so the signal ...
- 25
0
votes
2
answers
251
views
Improve DAC Pulse Rise/Fall Time
I have an older NI DAQ (PCI-6251) which comes equip with a bunch of ADC's, two DAC's and a hand full of DIO ports. I need to output a pulse of variable width, amplitude and DC offset which the DAQ ...
- 75
1
vote
1
answer
271
views
Attiny84 has a slow rising and falling edges
I'm using an Attiny84 to generate 100us pulses for a totem pole gate driver. I was expecting rise and fall times in the order of 10's of nanoseconds, what I got was rise times of 7.8us (10% to 90%) ...
- 105