How to generate a pwm signal with duty cycle 30%

How to generate a pwm signal with duty cycle 30% without using any of the source blocks.

Want to use the simulink library but not the blocks present in the sources

[KALYAN ACHARJYA]

May be: Do the coding then use in function block??

Answer 1

[Fangjun Jiang]

Use a resetable integrator to generate a sawtooth wave, compare it with a constant value, you'll get a PWM wave. The value of the constant determines the duty cycle.

[Harsha Nimje]

can u please elaborate? which signal to be connected to the 1st input port , 2nd input port what should be the reset condition?