# How can I divide signal by two from signal generator to properly drive H bridge?

I need to drive H bridge mosfets in hard-switching type. I got signal generator that can make pulses at the output with specific frequency and duty cycle.

I need to divide this signal frequency by 2 and keep duty cycle information from each pulse. Such as one pulse and according duty cycle goes to one leg of the H bridge (a) and the second pulse go to another leg of the H bridge (b). Just like in standard PWM controller. This duty cycle defines Ton time of MOSFETs. Dead time is not considering here. I have created logic schematic using 74hc components and it looks fine in simulator, but I am not professional in the digital design. Can anyone confirm that my solution is any good, or it has some disadvantages. P.S. Logic will drive MOSFET driveres. That driver should have builе-in programmable dead time. How do I design a circuit with that feature?

• Excuse me. I don't understand your question. (1) Let me twist your schematic a little bit, to make me easier to explain why I don't understand your question. (2) Let us relabel your four inputs to your H-bridge from A, B, B, A, to A, B, C, D. (3) Usually the input signals are PWM, by definition is a "periodic" signal with a fixed frequency. (4) The top part of your picture show a aperiodic signal. (4) I don't understand the meaning of "FSW", is it "fixed period"? Aug 28, 2021 at 12:52
• (2) Yeah, it is fine, let's call them A for Q1 B for Q2 C for Q3 and D for Q4. The thing is signals A and D are the same and B and C are the same too. So I simply called A and B. But it doesn't matter. (3) Picture above shows 3 different cases for D=0.25; 0.5; 0.9. The frequency is the same in all cases. (4) Fsw=switching frequency (5) I can link you to the soft switching type of H bridge so hard switching is a basically classic H bridge. vishay.com/docs/90936/an847.pdf Aug 28, 2021 at 14:21