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Jim Thompson[_3_] Jim Thompson[_3_] is offline
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Default 270 degree zero crossing shifter

On Mon, 23 May 2011 19:11:35 -0500, John Fields
wrote:

On Mon, 23 May 2011 16:53:52 -0700, Jim Thompson
wrote:

On Mon, 23 May 2011 05:01:22 +1000, Grant wrote:

On Sun, 22 May 2011 10:31:37 -0500, John Fields wrote:

Uncommented jumble

Wouldn't a 4046 be a better fit?


Or a simple bandwidth-limited differentiator if the system is not too
noisy. (Or pull the reverse trick... integrator as feedback.)

...Jim Thompson


---
My way is to measure the time between zero crossings, right shift it
by one bit with the LSB on the right edge, and then count it down to
get the sampling edge.


I know ;-)

Did the OP need that kind of accuracy, particularly given his problem
originated due to extreme band0limiting?

...Jim Thompson
--
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