I'd rather say I my obscurity was enlightened by the brilliant ideas:
IIR filters with perfectly linear phase, random sampling as long as
Nyquist condition is satisfied at the average, FDLS, thermal noise in
capacitors, compensation of hard nonlinearities in control loops,
3-dimensional FFTs, WI method for sound analysis.
If you concatenate the timers, you can control the pulse with and the
period with both timers, but this allows 1:1, 1:2, 1:3... duty cycles,
only. I wonder for what this obscure PWM output can be used for.
There is an "alternative" described in the datasheet: Just stop all
interrupts, use the same frequency for both timers and start the second
timer after some manual programmed delay loop. Ok, WindowsCE might crash
and it might be not so fast, if you do it too often, but at least the PWM
works, with a whopping precision of 1% !
It's a sorry state of affairs when defecating is the only time you're
able to think...and if you're there *that* long, you might consider a
fiber laxative such as Metamucil or something.
FDLS (Frequency Domain Least Squares) is an elegant universal method for
approximation of an analog transfer function by a digital filter. You can
get as accurate approximation as you need. FDLS was invented by Greg
Berchin. You can see him quite often in comp.dsp.
Vladimir Vassilevsky
DSP and Mixed Signal Consultant www.abvolt.com
But recently? Double-edge-clocked flops in Xilinx FPGAs, wave digital
filters, running DDS synthesizers backwards, running SRDs in series,
various bizarre aircraft serial busses, mach sensors and airplane
crashes, Legendre filters.
Sloman, A.W. "Comment on 'Computer aided simulation study of
photomultiplier tubes'", IEEE Transactions on Electron Devices, ED-38
679-680 (1991) doesn't even show up on Google Scholar.
I was commenting on a paper by Zaghloul and Ree - professor and
graduate student - who claimed that nothing had been published on the
subject. I cited five papers and an application note, and pointed out
that a couple of the papers I'd cited did include fairly comprehensive
reviews of what literature there is.
The 1978 paper I cited, by Aspnes and Studna, had made the same claim,
but Rev.Sci Instrum refused to publish my comment addressing that
point, amongst others.
I got started on the subject when Lush publishe his paper in 1965, so
I'm falling short on the recently, but I expect to stay way ahead on
obscurity.
If you can get a copy of "Methods of Experimental Physics", volume 12,
there's an astonishingly good discussion of how to make accurate
measurements with PMTs.
It's a sorry state of affairs when defecating is the only time you're
able to think...and if you're there *that* long, you might consider a
fiber laxative such as Metamucil or something.
It's not so much that you get time to think there, it is more that it
offers the sub-conscious an opportunity to bring the results of the
last few hours of background processing to your concious attention.
Jim's Alzheimer's seems to have gotten worse - why else would he
confuse a mobile stage with a house? Maybe he's reverting to a time
when he was trailer trash, and his homes all had wheels.
It's not so much that you get time to think there, it is more that it
offers the sub-conscious an opportunity to bring the results of the
last few hours of background processing to your concious attention.
Yup. Suppose you have a 4096 point waveform table, and the system
clock is 128 MHz. If the phase accumulator value is, say, 7FF00000,
you're skipping 2047 points every clock, and the sinewave is just a
hair under Nyquist, 63.9... MHz. At 80000000, the output is zero. At
80100000, you're skipping 2049 points every clock, equivalent to
-2047, so you're over Nyquist and walking the table backwards.
I haven't looked very much...but suspect it's a nonexistent animal.
I have to add one more detail...
That would be a tapped SMD chip inductor sharing the same core..
It's like a chip autotransformer.
Not 2 individual inductors in series.
Vladimir Vassilevsky [email protected] posted to
sci.electronics.design:
I'd rather say I my obscurity was enlightened by the brilliant
ideas:
IIR filters with perfectly linear phase, random sampling as long as
Nyquist condition is satisfied at the average, FDLS, thermal noise
in capacitors, compensation of hard nonlinearities in control loops,
3-dimensional FFTs, WI method for sound analysis.
