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Brocktune said:Unfortunately I do need my levels to rise quite quickly. I'm not concerned with frequency per say, but I do need a minimum rise time of about 20ms or as quickly as possible.
Nigel Goodwin said:Brocktune said:Unfortunately I do need my levels to rise quite quickly. I'm not concerned with frequency per say, but I do need a minimum rise time of about 20ms or as quickly as possible.
Well I wouldn't describe 20mS as a fast rise time - that's actually only a 25Hz sinewave from peak to peak!.
You can put 1k in series with each side of the cable on the driving end and still get 100us risetimes at the receiving end, even with 1000 feet of cable. Shorter lengths will give you faster risetimes.Brocktune said:Nigel Goodwin said:Brocktune said:Unfortunately I do need my levels to rise quite quickly. I'm not concerned with frequency per say, but I do need a minimum rise time of about 20ms or as quickly as possible.
Well I wouldn't describe 20mS as a fast rise time - that's actually only a 25Hz sinewave from peak to peak!.
That is true... 25msec is the longest I can deal with, but the signals are driving inputs of a very high speed digital section of my design, and I need them to rise as fast as possible. They will be generated (at the driver) at less than 100usec rise time, so I'd like to be on par with that at the receiver. Even though that's still pretty slow.