capacitor nonlinearity again

of a

that I did

falls off

capacitor based

seem to

I got as far as triboelectric charging, and then had to change the channel. ;)

Cheers

Phil Hobbs

based

Subcircuit as text for any who want to test drive...

• (0,1
• 0.9765,0.997
• 1.952,0.9809
• 3.0567,0.95
• 4.096,0.91324
• 5.395,0.8618
• 6.433,0.81332
• 7.602,0.7604
• 8.705,0.709
• 9.679,0.66785
• 10.588,0.6355
• 11.822,0.5856
• 12.991,0.5488
• 15.396,0.4783
• 16.89,0.44
• 18.32,0.4121
• 20.4,0.3739
• 24.11,0.3253
• 27.753,0.2855
• 30.226,0.2634
• 34.455,0.2339
• 39.467,0.2059
• 44.153,0.1852
• 50.2,0.163) .ENDS Y5U

HAHAHAHAHA! Welcome to the wonderful world of materials properties. The failure-to-discharge one usually sees is called 'soakage'. Soakage is a charge-migration in insulator materials. If, however, you want to deal with nonlinearities in a MLC capacitor, it's not generally just a dielectric problem, but concerns ferroelectric materials. So, one would have to Spice-model a three-dimensional material with grains that flip from one polarization to another, in a regime of mixed grain sizes, with nontrivial interactions between adjacent grains.

Detailed models are too messy; describe a test regime instead, and set desirable limits on the as-tested properties. and orientations, with temperature and stress dependencies.

so it sounds like "soakage" wins.

are there any units or measure of this property?

dence of a

der that I did

y) falls off

e capacitor based

ct ?

does seem to

y of a

et other

age

ale.

if

be

ne

and

for

ils.

Wow, so you missed the big arc discharge..

George H.

t -

of a

...

The

you

generally just a

would

Percent wrinkliness?

?-)

It's be DA plus (somehow) denoting a frequency response, or maybe it's delay... maybe like the diffusion equation?

Anyone know the MKS dimensions of JERK ?>:-} ...Jim Thompson

I've seen it done by tracking voltage recovery using a very high impedance voltmeter. The math model is a mess of RC circuits with widely varying time constants hooked together, in some combination of series and parallel.

I recall that Bob Pease talked about soakage in one of his books. Probably in an app note as well.

Well, in the SI system (the successor to MKS), it's meters per second cubed.

But I always thought one handled jerks by enumeration.

Joe Gwinn

The

Officially "Jerk" is the derivative of acceleration. I knew not of it until I was called in to design an elevator controller chip for a company in Little Rock. ...Jim Thompson

'Jerks' in Little Rock? Was this during the 'Clinton era'?

That was BC (before Clinton). ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at