how to get a pulse output at the start of a sine wave which is the input?

[A.N]

i am working on a comparator that generates a pulse for the positive cycle of a sine wave.but i want to get a pulse of shorter duration at the start of a sine wave (using labview) please suggest

[Filipe A.]

Hello;

You can synchronize one of the general purpose counters your board have to the analog input operation. By doing that, you can have your analog input starting the counter operation which will generate the desired pulse. Moreover, you can even specify the delay and width of that pulse. For more information on how to synchronize DAQ operations you can refer to an Application Note named "Advanced Synchronization Techniques for Data Acquisition" which can be found at our web site.
Hope this helps.
Filipe

[A.N]

thanks filipe for the answer.but i am using an evaluation software where i cant use daq operations.
hence could you tell me how to decrease the pulse width(output)