Math Puzzle...

Sounds like you never met Simpson, either.

John,

I finally figured out how to add an attachment in ABSE. I zipped the ASC and PLT files and uploaded them to ABSE with the title

"Comparison of 100ns moving average with 100ns RC and 10MHz Bessel filter"

It is set up for Helmut's version - Max Time Step is 1ps with .options plotwinsize=0. It runs slow.

The average turns into a flat line past 100ns.

If you change the Max Time Step to 100ps or the window size to 105ns (.param d = 105n), the average output signal changes to a semisinusoid.

The original version (V=idt(V(x)-absdelay(V(x),D))/D) doesn't need the max time step set to 1ps, and it exhibits the same change past 100ns with the window set to 105ns.

The Bessel and RC filters do not exhibit these effects.

JK

AVGX _will_ have ripple... the more cycles included in the window, the less ripple.

Give me some waveforms and I'll run them thru AVG and AVGX and post the results. ...Jim Thompson

Whoosh.

It can use 3 or 5 or by catenation any larger number of points. Just like Bezier curves. Then again, maybe that wasn't in the wiki article.

Plus a lot depends on point density, if you have plenty of points in any interval of interest it works just fine.

Your inability seems to be particular to yourself, i certainly do not share it. I follow Mike's argument, but it is incorrect.

?-)

It sure wasn't.

A switching regulator input current waveform is a pretty radical thing to fit a

Since you understand how it would work, and I don't, do it and show us.

And uphill! Both ways!!! ;-)

In 6 feet of snow and across the C&O tracks (that last part is true :-) ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

Straight up!

--

John Larkin Highland Technology Inc

Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

Single line, or multiple? ;-)

Aim for the third rail. ;)

Cheers

Phil Hobbs

Not easy to do with an enlarged prostate, but it might take care of the swelling...

REAL trains, not Eastern wimpy trains. When I was in high school it was still dominated by steam, with diesel just coming on strong. ...Jim Thompson

I'm from British Columbia--in West Virginia, all the mountains are flat.

Cheers

Phil Hobbs

Indeed, highest point is 5500' (Spruce Knob, near my grandparent's Thompson's farm).

But dz/dx is severe ;-)

...Jim Thompson

Monkey Hill, in Audubon Park, is all of 12 feet above sea level. Folks get light-headed up there.

Looks like it has shrunk ;-) ... Google says it's only 4,862', but Prominence is 2,782'

Here's some pictures from up there...

(His 83rd. He made it to 92)

Beautiful country!

My grandfather kept a couple of cows in a pasture he owned up near the "knob". The farm house, 7th, 6th, 5th photos from last, was in Riverton, WV. ...Jim Thompson

I do not have a teaching certificate. It is only high school level math after all.

Oh, and after checking the wiki article it does have extended spans, just not correctly. I don't like the article as it poorly written.

?-)

My first was a then already old '62 Nash when i was 19. Cost about 150 bucks. And the seats still folded down to make an acceptable bed. Those were some really interesting days.

?-)

Nice. Sort of like Holland, but with more hanging moss and way, way better food. ;)

Cheers

Phil Hobbs