How to provide a delay in seconds from an external block to a pulse generated by another block?

PWM pulse is generated comparing sinusoidal block and reference sawtooth block. now i have to provide a delay of one microseconds to this pulse.Kindly help me how to acheive this task.

Answer 1

[Azzi Abdelmalek]

Use a unit delay block

[M A ullaah]

unit delay block gives a delay but not exactly the amount of time which we required

[Azzi Abdelmalek]

you have just to set the sample time of your block to get the amount of time you need

[M A ullaah]

dear azzi abdelmalek, i have chosen a pulse generator with 50% duty cycle,0.02 period,1 amplitude,and zero phase delay. i have connected this pulse generator to scope via one delay block having a sample time of -1, and another delay block with a sample time of 1e-6 . i could not find any difference in the output between the above two delay blocks. i cound not get a delay of 1 micro second by seting it in sample time

[Azzi Abdelmalek]

In configuration parameter change your step time from variable to fixed, and set this step time to 1e-6.

[M A ullaah]

Thank you dear azzi abdelmalek i got the answer for my questions.

[M A ullaah]

Kindly suggest me some ways to use variable step and to get same output because the other subsystem needs variable step .

[Azzi Abdelmalek]

Then set the sample time of your pulse generator and the unit delay block to 1e-6

[M A ullaah]

"with a fixed step just by replacing the sample time of a delay block one can get the required delay" as said by u mr.azzi. But in this method the rising edge is delayed correctly but not the falling edge. Any other method can u suggest. or m-file coading? plz