why do we need different mental layers for CMOS technology?

Not mental, metal.

Mental: involving the mind or an intellectual process; "mental images of happy times"; "mental calculations"; "in a terrible mental state"; "mental suffering"; "free from mental defects"

Metal: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

Just like a multilayer PC board. You need lots of layers to make all the interconnects and do the power and clock distribution.

John

Mental layers control the thinking...

The more mental layers, the easier it is to think up CMOS designs.

Sno-o-o-o-ort !-)

...Jim Thompson

What did you expect from gmail !

Even without the typo, I (we) thought this was a joke.

All chip technologies has multiple metal layers.

Google or your professor can help you.

donald

Why does Chinese music sound off key?

That's always been a puzzle to me... since the only other use of the pentatonic scale is Scottish music.

...Jim Thompson

Because it's (usually & traditionally) in pentatonic scale?

Best regards, Spehro Pefhany

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

"The Irish were Egyptians long ago" - or the Scots were Chinese?

No, that wasn't meanness. That was "humor". You are obviously new to usenet or you'd have grown a sense of it by now. Or not, but I find it useful.

Did you notice Don's last line?

If you don't have a professor, we see you use Google's Gmail. We also assume you have some skill using the Google search engine. As another example of American humor; that skill is often called Google- fu, but it isn't at all derogatory.

How strong is your Google-fu?

I ask because the regulars here will _help_ you learn, but they mostly would also like to know you know _how_ to learn. That's another kind of -fu, and we don't know how far advanced you are.

So, what have you done so far, and what book or website example can you cite of exactly what you don't get?

Mark L. Fergerson

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The Scots couldn't afford all 8 tones.

Maybe all the modern ones do. The old mustard-colored TTL handbook had lots of schematics, and each was carefully drawn with no wire crossings. Because that's how they were designed, on account of there wasn't any second metal layer.

Crossovers COULD use a low-value resistor (base resistor) but that took up area, and it was considered a last resort. The transistor bases were natural crossover opportunities, so you'd see lots of transistors with wires attaching to the base from left and right...

But there are only two tunes for the bagpipes.

try drawing a moderately complex circuit (maybe a half-adder or twin-tee oscillator) so that no wires cross.

Bye. Jasen