Hi,
I have a low power pwm inverter designed back in 1996 which currently uses 4 ls ttl for logic and the first couple of dozen bytes of a 2764 eprom to store 90 degree out of phase half sine tables. Inverter output frequency is 400Hz.
I need to update this to provide 6 pwm outputs, antiphase pairs at 120 degree intervals. Sine table will have 6 steps per quadrant. I could modify the existing design, but have been looking at fast micros and gate array for the logic. A micro is not really fast enough, even in assembler, so the question is, what is the lowest cost gate array or similar that could replace all the above logic. Nothing fancy, minimum cost for development kit, simple programming, and min cost in production ?...
Regards,
Chris