micro power square wave oscillator

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Your spell-checker is right, for what that's worth. The dictionary spelling is "scatological" and Google throws up 311,000 examples of that versus 56,700 for "scatalogical". Since the vowel in question is unstressed and thus pronounced with a schwa, even you wouldn't bother to get excited about it if you weren't a loser scrabbling to save face,

It is a tolerably low frequency word - thirteen in every 100 millions words of English, which puts it at position 97,576 down the word frequency table. Kucera-Francis doesn't even list it

-- Bill Sloman, Nijmegen

I thought that was what he was talking about.

Yep, From his mother ;-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | 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

Do you have any proof that he ever had a mother?

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My, what a charming company.

-- Bil Sloman, Nijmegen

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You do get excited about typos - and your spell-checker can find them for you.

-- Bill Sloman, Nijmegen

Has anybody suggestesa 4093 Schmitt trigger NAND yet? Although that only goes down to 3 V, the input cap i s7.5pF, and with a single feedback resistor think the charge current will be low. Dunno how symmetrical it will be... or how stable. Maybe there are better suited Schmitt trigger CMOS chips too.

Cute. You could make a bundle selling those ideal 0.5H inductors. :O)

That was a nice comparator--betcha could redo this with a crystal and kick tail.

Cheers, James Arthur

The cross currents of the input stage will kill ya.

Try the Micrel. MIC1557. SOT-23-5 package.

Guzzles 200uA at 3V.

Oops. By bad. I live mostly in the mA world.

I used to live in the kilowatt world (RF, ham radio). Then I married ...

On a sunny day (Fri, 04 Jul 2008 12:53:35 -0700) it happened Joerg wrote in :

Probably, well it is not an easy thing 2V, 10uA, 100kHz. In fact I have been unable to come up with something that I know works 100%.

Probably either a multivibrator with RF transistors or really small geometry regular BJT (hard to find nowadays) or one of those battery monitor chips used as an oscillator. But I can't try that out right now, the missus sez it's clean-up day ...

The aren't much good at very low currents and there's only one in the package. The UPA861TD looks better on these points.

Interesting that one is 0.35pF and the other 0.25pF, probably because of the not quite symmetrical pinout:

Both package variants non-stock at Digikey though :-(