I'd need more information about the quality of the signals, and the 40KHz time-base, so I may be too simple.
An easy way to create three signals with a fixed relationship is to use a shift register with parallel output (cost under $0.30). Each of the three signals comes from one of the parallel outputs of the shift register. Treat it as a 4-bit shift register, and use the 4th bit to reset it.
If the signals need to overlap, use OR gates to combine several shift-register output bits.
Clock it at 120KHz, and it gives 40KHz.
For the clock maybe using something as simple as a 555 timer, but maybe something a bit more sophisticated with a binary divider.
If you use a 4000 series parts, it can run upto 18V, so that might be enough to switch the MOSFETs directly.
You'd want to clear it to an initial state, and some have enough enables and inputs to do that with very little other logic.
I'd need more information about the quality of the signals, and the 40KHz time-base, so I may be too simple.
An easy way to create three signals with a fixed relationship is to use a shift register with parallel output (cost under $0.30). Each of the three signals comes from one of the parallel outputs of the shift register. Treat it as a 4-bit shift register, and use the 4th bit to reset it.
If the signals need to overlap, use OR gates to combine several shift-register output bits.
Clock it at 120KHz, and it gives 40KHz.
For the clock maybe using something as simple as a 555 timer, but maybe something a bit more sophisticated with a binary divider.
If you use a 4000 series parts, it can run upto 18V, so that might be enough to switch the MOSFETs directly.
You'd want to clear it to an initial state, and some have enough enables and inputs to do that with very little other logic.
