LabVIEW
20Hz impulse signal with 200ns ON time using analog output channel
Hi armaghan,
@armaghan wrote:
Hello I need assistance how can i generate impulse signal with 200ns ON time from analog channel from 6363
You cannot generate such an AO signal as the 6363 only supports upto 2.86MHz sample rate for a single AO channel. To create pulses of 200ns length you need a sample rate of (minimum) 5MHz…
Why don't you use DO pins as they allow upto 10MHz sample rate?
Hi armaghan,
please call your local NI sales rep to discuss all of your requirements.
Then you will get a suggestion about hardware from NI and maybe also a valid quotation to buy it…
What about an external (fast) amplifier circuit driven by a DO pulse?
What about using an external MOSFET, driven by the DO pulse, to switch on/off the AO signal? (Might be cheaper then DAQ hardware capable of driving AO signals at ~10MHz.)
@armaghan wrote:
o yes That's good option do you have any MOSFET based circuit diagram which will be helpful in my course
You’re not asking much, do you? We don’t have a hardware engineering service in this fora and to design a circuit like this takes quite a bit more than a few minutes.. Do you really expect anyone to give you several hours or more likely days of hardware engineering service for free on here?
And when you talk about course, do you mean this was a course assignment from school? In that case you surely should have been able to reason that 200ns resolution needs at least 5MHz update rate and that with standard AO hardware you won’t be able to do it. Unless you skipped classes of course.
An easier way would probably be a 5MHz clock and a logic divider by a certain factor to get your 20Hz signal. With 2 or 3 TTL logic circuits this should be doable (or integrating this in FPGA). Still need a voltage controlled amplifier afterwards to satisfy the adjustable amplitude.
