Circuit Contest - Last Day

J

Jim Thompson

Guest
Monday, October 31, is the last day for submission to the first
circuit analysis/design contest.

So far only two reasonable submissions for Circuit1. None for the
others.

No surprise. I figured as much :-(

...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 |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Jim Thompson wrote:
Monday, October 31, is the last day for submission to the first
circuit analysis/design contest.

So far only two reasonable submissions for Circuit1. None for the
others.

No surprise. I figured as much :-(

...Jim Thompson
Click to expand...
Yep- that's about right. Maybe you should try changing the angle of this
"contest" to invention instead of straightforward circuit analysis. The
ignorant losers, who comprise the majority of SED, will be self-excluded
still, but the competent enthusiasts at all levels can compete.
 
On Wed, 02 Nov 2005 03:09:09 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 01 Nov 2005 16:31:54 -0700, Jim Thompson
thegreatone@example.com> wrote:


Of course I'm better than YOU ;-)

---
As far as you're concerned, that's what it's all about, isn't it?

That is, you can't accept that people with opinions different from
yours can be your peers, they _have_ to be inferior in order to keep
your ego safe.

"The great one"? Gimme a break...
Click to expand...
FOAD ;-)

...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 |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
On Thu, 03 Nov 2005 19:05:57 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hello Jim,

Does it work like the AD603 ladder or is it a stack of the usual Gilbert
cells?

Only if you are at liberty to say, that is.

Variable transconductance.


IOW, Gilbert "de luxe" ;-)

Regards, Joerg

http://www.analogconsultants.com
Click to expand...
Not quite. Gilbert is a multiplier stack. This was done by simply
changing the transconductance of a differential pair in a complicated
fashion that varied signal handling capability inverse to gain.

At one point in time I posted the complex temperature tracking current
reference that allowed ą0.5dB stability over the gain curve... one of
my previous "what is it" postings ;-)

...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 |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
On Wed, 16 Nov 2005 04:28:12 GMT, JosephKK <joseph2k@lanset.com>
wrote:

Jim Thompson wrote:

On 1 Nov 2005 06:48:44 -0800, Winfield Hill
Winfield_member@newsguy.com> wrote:

Andrew Holme wrote...

Jim Thompson wrote:
Monday, October 31, is the last day for submission to the first
circuit analysis/design contest.

So far only two reasonable submissions for Circuit1. None for the
others.

No surprise. I figured as much :-(

You might not have many responses, but I'm sure I'm not the only person
waiting to be enlightened, whose curiosity was aroused by one or other
of the circuits. I puzzled over the logic buffer circuit for a while,
but I couldn't fathom its purpose: speeding up the edges? Slowing down
the edges?? Controlling the thresholds??? So I hope you're going to
educate us in due course.

I couldn't even find the file, so clearly I was out of it. : )

Originally posted to A.B.S.E with an announcement on S.E.D to go to
A.B.S.E

When many didn't get A.B.S.E on their servers I also announced and
posted a URL...

http://www.analog-innovations.com/SED/Contest1.zip

...Jim Thompson
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?
Click to expand...
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
--
| 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 |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Jim Thompson wrote...
Winfield Hill wrote:

Joerg wrote...

The AD603 has an interesting attenuator up front that maintains good
dynamic range. But that thang has become so expensive that I haven't
used one in a design in years. They might still be under patent
protection for that attenuator.

It's also noisy at low gains, figs 24, 25. Barry first
attenuates the input signal then amplifies it back again.

In my sonar case the low-gain noise is not an issue... low gain
equals high signal handling capability, so the SNR is still good.
Click to expand...
Right, hence Barry's design decision. But I'd like to see an
electronic attenuator with that architecture but with a say
-20 to +20dB gain range.


--
Thanks,
- Win
 
Hello Win,

The AD603 has an interesting attenuator up front that maintains good
dynamic range. But that thang has become so expensive that I haven't
used one in a design in years. They might still be under patent
protection for that attenuator.

It's also noisy at low gains, figs 24, 25. Barry first
attenuates the input signal then amplifies it back again.

In my sonar case the low-gain noise is not an issue... low gain
equals high signal handling capability, so the SNR is still good.

Right, hence Barry's design decision. But I'd like to see an
electronic attenuator with that architecture but with a say
-20 to +20dB gain range.
Click to expand...
The AD603 is -11dB to +31dB in its wide bandwidth configuration. It
wouldn't be a big deal to migrate that into a chip that does -20dB to
+20dB. There may not be enough of a market for them to do it though.

Considering that I played with the AD600 around 1992 the patent may not
have that much life left in it. But I doubt that there'll be much
competition coming once it expires. It is such a small market and the
really cost critical designs are likely going to remain discrete anyway.

Regards, Joerg

http://www.analogconsultants.com
 
Jim Thompson wrote:
It's a dummy E-mail for Chris' sake.

...Jim Thompson
Click to expand...
And its very appropriate E-mail address for a dummy.


--
?

Michael A. Terrell
Central Florida
 
On Fri, 04 Nov 2005 10:22:33 -0700, Jim Thompson
<NotAsGreatAsYouAre@example.com> wrote:

On 4 Nov 2005 08:53:03 -0800, Winfield Hill
Winfield_member@newsguy.com> wrote:

Jim Thompson wrote...

Happy now ?:) Sheeesh!

"NotAsGreatAsYouAre@example.com"
Wow, that's a good start!

I started to make it "NotAsGreatAsJohnFields@example.com" but decided
that was just too much of a stretch ;-)
Click to expand...
---
That's fine... Every man's reach should exceed his grasp.

Flaming through your plonk, huh??? Typical chickenshit redneck
truck.

--
John Fields
Professional Circuit Designer
 
"Jim Thompson" <NotAsGreatAsYouAre@example.com> schreef in bericht
news:eb2nm1hj3gqhotpne3v5qv6ruqanifojl2@4ax.com...
On 3 Nov 2005 18:55:55 -0800, Winfield Hill
Winfield_member@newsguy.com> wrote:

Rich, Under the Affluence wrote...
John Fields wrote:
Jim Thompson wrote:
John Woodgate wrote:

Ah, Act 1, Act 2 and now the Turd Act. (;-)

Bwahahahaha !-)

There will NOT be a 4th Act. I will NEVER un-plonk him again.

I don't know why John Fields harbors such hostility toward me.
Maybe he has feelings of inadequacy ?:)

Naah...

Your pomposity annoys me.

AOL
Me, Too!
/AOL

It <thegreatone> annoys me, but I try to ignore it (not always
with success). Whatever, this time John went bananas.

Who knows, it <thegreatone> happens. Hard to explain...

Happy now ?:) Sheeesh!
Click to expand...
No, not happy at all. Back in the killfile you go, you miserable
piece of shit.

--
Thanks, Frank.
(remove 'q' and '.invalid' when replying by email)
 
"Richard the Dreaded Libertarian" <Say_Rich_Greiss@example.net> schreef in
bericht news:pan.2005.11.03.22.12.45.105889@example.net...
On Thu, 03 Nov 2005 20:36:34 +0000, Genome wrote:
"Jim Thompson" <thegreatone@example.com> wrote in message
On Thu, 03 Nov 2005 14:19:06 -0600, John Fields
On Thu, 03 Nov 2005 08:16:31 -0700, Jim Thompson
On Thu, 03 Nov 2005 09:12:59 -0600, John Fields

Hmmm.... Sounds like a little of TokaMundo has rubbed off on you!^)

Nope. Just stop acting like a TURD and I'll stop calling you one.

...Jim Thompson

You two are acting like a pair of returds...... }:)~~~

I think Jim is at that age where he's being dragged, kicking and
screaming, from the end of his mid-life crisis into Old Age, and
is trying to recapture any snippets of his lost youth that his
poor ol' ossified brain can dredge up, which, of course, consists
primarily of lame insults.
Click to expand...
It would have been nice if JT's father shot his cum into
the fireplace instead of....


--
Thanks, Frank.
(remove 'q' and '.invalid' when replying by email)
 
On Fri, 4 Nov 2005 20:32:53 +0100, "Frank Bemelman"
<f.bemelmanq@xs4all.invalid.nl> wrote:

"Richard the Dreaded Libertarian" <Say_Rich_Greiss@example.net> schreef in
bericht news:pan.2005.11.03.22.12.45.105889@example.net...
On Thu, 03 Nov 2005 20:36:34 +0000, Genome wrote:
"Jim Thompson" <thegreatone@example.com> wrote in message
On Thu, 03 Nov 2005 14:19:06 -0600, John Fields
On Thu, 03 Nov 2005 08:16:31 -0700, Jim Thompson
On Thu, 03 Nov 2005 09:12:59 -0600, John Fields

Hmmm.... Sounds like a little of TokaMundo has rubbed off on you!^)

Nope. Just stop acting like a TURD and I'll stop calling you one.

...Jim Thompson

You two are acting like a pair of returds...... }:)~~~

I think Jim is at that age where he's being dragged, kicking and
screaming, from the end of his mid-life crisis into Old Age, and
is trying to recapture any snippets of his lost youth that his
poor ol' ossified brain can dredge up, which, of course, consists
primarily of lame insults.

It would have been nice if JT's father shot his cum into
the fireplace instead of....
Click to expand...
---
His wife's cold, dark ass?

Ah, but then we wouldn't have Jim to rag on...

--
John Fields
Professional Circuit Designer
 
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