Maybe someone can help here...
**broken link removed**
U2 and U3 are LS590 8 bit counters with registers.
I need a 32 µs pulse output. I am cascading two counters. Each has a 10MHz clock. It takes 320 clock cycles to make 32 µs. So, the counters count to 320. The bits that make 320 in binary are AND'd and that output resets the timers and the SR- latch.
For the most part I have a nice 32 µs pulse output. However, the pulse duration seems to jump around between 3 values. The first is 32 µs, the next is 26 µs, and the last is 6.28 µs. The values are seemingly random.
[EDIT] I know the outputs clear as well because the AND gate drops out. Still the same problem though.
Any ideas?
Sorry for the schematic... I cant find a decent computer based program to let me draw them.
**broken link removed**
U2 and U3 are LS590 8 bit counters with registers.
I need a 32 µs pulse output. I am cascading two counters. Each has a 10MHz clock. It takes 320 clock cycles to make 32 µs. So, the counters count to 320. The bits that make 320 in binary are AND'd and that output resets the timers and the SR- latch.
For the most part I have a nice 32 µs pulse output. However, the pulse duration seems to jump around between 3 values. The first is 32 µs, the next is 26 µs, and the last is 6.28 µs. The values are seemingly random.
[EDIT] I know the outputs clear as well because the AND gate drops out. Still the same problem though.
Any ideas?
Sorry for the schematic... I cant find a decent computer based program to let me draw them.
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