**Part Number:**LM2903B-Q1

At this time, I would like to analyze the performance of the LM2903B-Q1.

I did some manual calculations and simulations (with SIMetrix) to make sure the simulation result.

To make the context, I try to simulate the comparator with V input range from 1 [V] to 32 [V] and this graph show the duty cycle (%) in every 1 [V] differences.

However, the results are quite different. I get linear correlation from manual calculation but for simulation is a **linear type but with step value**.

for example:

V input | Manual Calculation duty cycle | Simulation duty cycle |

11 [V] | 39.18% | 44% |

12 [V] | 40.93% | 44% |

13 [V] | 42.69% | 44% |

14 [V] | 44.44% | 44% |

15 [V] | 46.19% | 44% |

16 [V] | 47.95% | 50% |

17 [V] | 49.70% | 50% |

18 [V] | 51.45% | 56% |

19 [V] | 53.20% | 56% |

20 [V] | 54.96% | 56% |

21 [V] | 56.71% | 56% |

Although the results have the same behavior (same gradient) I want to know the cause, do you familiar what the factors affect the simulation results? Why the simulation result is step value instead of linear?

green line: simulation result

orange line: manual calculation

Thank you in advance