Development of H-bridge on bipolar transistors

Question

I want to design a low power H-bridge on bipolar transistors. I've already made one, built the board and tested it. Generally works, but there are difficulties with control and sometimes I have a short circuit in the power supply.Here is the first version I made:

Now I found another scheme, and I plan to use it: H-Bridge Transistor Smoking (Bipolar BJT Transistor)

I changed my design a bit based on the post above: I combined the control inputs in pairs. Thus, the upper and lower transistors cannot be opened at the same time. Although I'm sure it will work, but what would you say to this? My control inputs may not be connected anywhere and catch interference. Therefore, I added two pull-up resistors to ground, so that at least the bottom transistors are closed and there is no short circuit. The upper transistors will be open all the time. What do you think of my design? Maybe they would give some advice. Thank you

I changed my previous design a bit, should be correct.

And what about such a scheme? Instead of mosfet transistors, I use bipolar ones. I want to find a circuit that will not have dangerous input combinations and will not react to unconnected control inputs.

Answer 1

Now I settled on a new scheme that I plan to exploit. I tested it in the online simulator, it should work in practice. As I wanted, the circuit does not have dangerous combinations that will lead to a shoot through. Floating control inputs will not cause problems. The only thing that confuses me is that the number of transistors is twice as large, and the huge number of resistors. The resistor ratings on the circuit are still standard from the simulator, but it already works well. Perhaps someone knows of other circuits that do not contain such a combination that will lead to a short circuit and use fewer transistors.