Pulse width modulation. Suppose the readings go like this:
6,5,5,5,5,5,5,5,5,5,6,5,5,5,5,5,5,5,5,6,5,5,5,5,5,5,5,5,5,5 you would be able to interpolate that result to be 5.1 If it went: 6,6,5,5,5,5,5,5,5,5,6,6,5,5,5,5,5,5,5,5,6,6,5,5,5,5,5,5,5,5 You would be able to interpolate that result to be 5.2 Or: 6,6,6,6,6,5,5,5,5,5,6,6,6,6,6,5,5,5,5,5,6,6,6,6,6,5,5,5,5,5 would be 5.5 and on down the road until you achieved: 6,6,6,6,6,6,6,6,6,5,6,6,6,6,6,6,6,6,6,5,6,6,6,6,6,6,6,6,6,5,... which would be 5.9 I am certain that I have miscounted somewhere (everywhere?), and the digits displayed are not required to be so ridged in how they distribute, just that you are getting ratios between one and the other. -Chuck Harris Bill Hawkins wrote:
Referring to a 1952 manual on servo systems, jitter seems to be noise in the system, while dither is intentionally introduced to get a servo through its dead space (usually caused by static friction). The dead space in a counter is the interval between least significant integers. Thus the amplitude of the dither is the size of that dead space at a frequency that will be lost in the average. I can see how this would work for a servo system, but how can a counter display more resolution than its least significant digit? Bill Hawkins
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