ikalogic wrote:HeZ wrote:It also provides some safety features.
W1 and W2 and the inputs the logic circuit, the state of the power transistors are the outputs. Using a logic circuit to control the power transistors allows the circuit to turn on/off only selected pairs of power transistors.
Forward Q5 = 0, Q6 = 1, Q7 = 1, Q8 = 0
Reverse Q5 = 1, Q6 = 0, Q7 = 0, Q8 = 1
There are no combination of inputs that will allow say Q5 and Q6 to both be on simultaneously. That would cause a short between the positive and negative terminals of the power source. Which as im sure you can imagine would be baddd
I agree! that's also very important.
I think you are right about the safety, this circuit does provide safety feature. But it seems to me that our only task is to keep only one transistor "on" at a time, from Q5 and Q6, and I wonder "isn't it possible to accomplish that with BJT inverters etc".
I meant to say that I agree that it provides safety as well as control, but I think the same task could be done with a little less elements.