Circuit Contest - Last Day

I guess you still can have Jim design a chip for you for internal use.

Well, I grew up in Minnesota, and there, "Swede" pretty much means "Your neighbor's ancestor.".

There's turnips, there's kohlrabi, and there's rutabaga, and as you go down the density scale, there's carrots, and wood.

You can bite into a kohlrabi, almost as easily as you could bite into a potato, or an apple. And, heh, heh, the flavor of a kohlrabi is kind of "sweetish". Guh-hyuk! .

A turnip is only a fat albino carrot.

But a rutabaga - now, that's the yellow one - I've never seen a rutabaga that's as orange as a carrot, but biting into one would be like biting into a carrot that's covered with wax and has a radius of about 3" (7.5 cm). To make a rutabaga edible, you have to cook it for about an hour.

But, DAMN! They're tasty! They have that "adult" flavor, like Brussels sprouts.

Gotta go make some lunch now. ;-)

Cheers! Rich

Hello Jim,

I don't remember the patent date but since I played with the AD600 in the early 90's this patent protection is bound to run out in the not too distant future.

Regards, Joerg

I read in sci.electronics.design that Mark Zenier wrote (in ) about 'Circuit Contest - Last Day', on Fri, 4 Nov 2005:

One of my aims in life is to teach Merkans about other languages. (;-) Besides there are a number of people here who aren't Merkans.

The thing with orange flesh is only called a swede in England, I think In Scotland, it's a turnip or neep. I'm not sure what if any difference there is between a rutabaga and a turnip or swede.

Mangold-wurzel, anyone? That 'wurzel' is German or Dutch in origin, I'll bet.

You should have subtly signalled that, then. F'rinstnace, 'Just czeching that you know we call them turnips or rutabaga in Leftpondia.'

Is that some sort of Welsh?

I didn't invent the name 'swede' for the vegetable or the name 'Swede' for a person from Sweden.

I assume that it is too late to enter, correct me if i am wrong.

Now that was a useful link. After quickly examining (about 10 ~ 15 minutes) the circuits involved;

#1 is a buffer while not necessarily slower than an old LH0002 most certainly has higher input impedance.

#2 Looks like a multiplier/divider circuit of the form X*Y/10Z where X and Y are bipolar (four quadrant) and unipolar Z.

#3 looks like a differential to single ended BiCmos IF amplifier with AGC. Very useful for SSB and ISB systems.

Is that anywhere near close?

I will bet that it is a problem of patent issues and process issues, the that patent covered it is under processes that are no longer available, and the method currently used may not be covered under the patent.

Look up the patent number and the underlying patents, it shouldn't be long if it is still enforcable at all. The underlying physics is over 40 years old and most patents should be twenty or more. (expired)

Nope.

I have the description of Circuit 1 almost complete, got side-tracked by real work, but should have it posted this weekend.

...Jim Thompson

They are are almost here, but they are vendor specific, proprietary and often have per unit license fees; nor are they often post production programmable (fpga like). There seems to be a speed dependant transfer point to very high density programmable logic that can implement DSP like functionality at speeds DSP's do not yet achieve.

Circuit 1 Explanation....

Both Robert Hickey and Bob Monsen submitted respectable (and reasonably accurate) explanations.

The rest (you know who you are) were laughable (some certainly that way on purpose ;-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

I thought you got enough across on the first pass to indicate you understood what was happening.

...Jim Thompson

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

I was sure I was part of the "laughable" group. You saw where I only submitted because of the poor response you mentioned. Did I need to send that second email mentioning "positive feedback" or did I get that across in the first {rambling} one.

Robert