Driver to drive?

John Larkin · Jul 2, 2012

On Sun, 01 Jul 2012 19:38:52 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:

On Sun, 01 Jul 2012 15:17:09 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:

On Sun, 01 Jul 2012 14:49:56 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

Phil Hobbs wrote:

Jim Thompson wrote:

On Sun, 01 Jul 2012 14:37:33 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

Jim Thompson wrote:

On Sun, 01 Jul 2012 13:54:51 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

Jamie wrote:

George Herold wrote:

On Jun 30, 2:24 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 30 Jun 2012 02:21:59 -0700 (PDT), muna alhyaly

m.s.alhy...@gmail.com> wrote:

hi I need your help

I design diferrential TIA and I need analysis these TIA to found equations of gain and bandwidth and noise
so I need referrences about these object?
please help me

Get Phil Hobbs' book:

http://electrooptical.net/

http://tinyurl.com/84aupf2

--

John Larkin Highland Technology Incwww.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

Well nothing against Phil's book, but he sorta assumes you already
know the TIA opamp circuit.

The OP might try S. Franco's book, "Design with Operation Amplifiers
and...".
Which does a nice job (IMO) of writing down all the opamp equations.

George H.

Here's an interesting file that covers a lot.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110007350_2011006212.pdf

Jamie

Resolving ntrs.nasa.gov... 198.119.164.64
Connecting to ntrs.nasa.gov|198.119.164.64|:80... connected.
HTTP request sent, awaiting response... 403 Forbidden
2012-07-01 13:53:48 ERROR 403: Forbidden.

Got a cached copy you can link to?

Cheers

Phil Hobbs

Forbidden only to PhD's using cheap ISP's ;-)

I've E-mailed yo a copy.

Thanks, I think. It was an ActiveX script that they insisted on
installing.

Cheers

Phil Hobbs

That's odd. I have everything automatically blocked, and must
temporarily assign permissions (Firefox, v13.0.1). I saw no requests
to activate anything.

...Jim Thompson

Well, it didn't work on my Firefox or wget--both 403. I used
Intelligence Expunger, and it worked after installing some ActiveX
thing.

Cheers

Phil Hobbs

It might also have been shame--their TIA is a good 20 dB off the pace.

Cheers

Phil Hobbs

TIAs seem to usually be done almost as badly as software.

Yup. I covet their photodiodes, though--2.5 pF per quadrant of a 1 mm
circle is abou 1.3 nF/cm**2, which although far worse than the best Si
(~40 pF/cm**2) is a lot better than the usual InGaAs (4-10 nf/cm**2).
That's a factor of 10 in high-frequency SNR right there, which I want.
I wonder who makes their PDs?

Cheers

Phil Hobbs

Didn't they say "Discovery" ? Envision $$$$.

Discovery Semiconductor seems to be a small outfit near Trenton NJ, a
couple of hours from me. It might be worth a trip down there--SNR
doesn't grow on trees, and InGaAs PDs are notoriously horrible for
capacitance.

Cheers

Phil Hobbs

They make really fast photodiodes, like 40 GHz or something like that.
Expensive, as I recall.

--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

Bob Pownall · Jul 2, 2012

On 7/1/2012 8:01 AM, George Herold wrote:
<snip>

The OP might try S. Franco's book, "Design with Operation Amplifiers
and...".
Which does a nice job (IMO) of writing down all the opamp equations.

Another possibility is J. Graeme "Photodiode Amplifiers: Op Amp Solutions"

Bob Pownall

josephkk · Jul 2, 2012

On Sun, 01 Jul 2012 14:30:26 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

Jamie wrote:

Phil Hobbs wrote:

Jamie wrote:

George Herold wrote:

On Jun 30, 2:24 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 30 Jun 2012 02:21:59 -0700 (PDT), muna alhyaly

m.s.alhy...@gmail.com> wrote:

hi I need your help

I design diferrential TIA and I need analysis these TIA to found equations of gain and bandwidth and noise
so I need referrences about these object?
please help me

Get Phil Hobbs' book:

http://electrooptical.net/

http://tinyurl.com/84aupf2

--

John Larkin Highland Technology Incwww.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

Well nothing against Phil's book, but he sorta assumes you already
know the TIA opamp circuit.

The OP might try S. Franco's book, "Design with Operation Amplifiers
and...".
Which does a nice job (IMO) of writing down all the opamp equations.

George H.

Here's an interesting file that covers a lot.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110007350_2011006212.pdf

Jamie

Resolving ntrs.nasa.gov... 198.119.164.64
Connecting to ntrs.nasa.gov|198.119.164.64|:80... connected.
HTTP request sent, awaiting response... 403 Forbidden
2012-07-01 13:53:48 ERROR 403: Forbidden.

Got a cached copy you can link to?

Cheers

Phil Hobbs
Yes. I just looked at it again.. I also just save it to file.

They must not like you.

How would you like it?

Jamie

Thanks. They want to install some gross ActiveX thing, which only works
in Intestinal Exploder on Windows. I have a sacrificial system I can
use for that, thanks.

Cheers

Phil Hobbs

Gee, i use Firefox in wine and saw nothing of the kind. It came right up
and saved just fine.

?-)

Jim Thompson · Jul 2, 2012

On Sun, 01 Jul 2012 20:52:16 -0600, Bob Pownall
<repownall@netscape.net> wrote:

On 7/1/2012 8:01 AM, George Herold wrote:
snip

The OP might try S. Franco's book, "Design with Operation Amplifiers
and...".
Which does a nice job (IMO) of writing down all the opamp equations.

Another possibility is J. Graeme "Photodiode Amplifiers: Op Amp Solutions"

Bob Pownall

Michael A. Terrell · Jul 2, 2012

josephkk wrote:

Gee, i use Firefox in wine and saw nothing of the kind. It came right up
and saved just fine.

I got the same error message as Phil. Firefox & XP.

josephkk · Jul 3, 2012

On Mon, 02 Jul 2012 16:10:20 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

josephkk wrote:

Gee, i use Firefox in wine and saw nothing of the kind. It came right up
and saved just fine.

I got the same error message as Phil. Firefox & XP.

OK, maybe it is firefox version, that one is 3.6.28. Maybe i will have
to fire up an XP -- ooh that might be a problem, i may not have any
hardware that will run it any more. And XP in a VM is not the same
creature.

?-)

Michael A. Terrell · Jul 3, 2012

josephkk wrote:

On Mon, 02 Jul 2012 16:10:20 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

josephkk wrote:

Gee, i use Firefox in wine and saw nothing of the kind. It came right up
and saved just fine.

I got the same error message as Phil. Firefox & XP.

OK, maybe it is firefox version, that one is 3.6.28. Maybe i will have
to fire up an XP -- ooh that might be a problem, i may not have any
hardware that will run it any more. And XP in a VM is not the same
creature.

This is Firefox version 13.0.1

josephkk · Jul 4, 2012

On Tue, 03 Jul 2012 08:43:04 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

josephkk wrote:

On Mon, 02 Jul 2012 16:10:20 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

josephkk wrote:

Gee, i use Firefox in wine and saw nothing of the kind. It came right up
and saved just fine.

I got the same error message as Phil. Firefox & XP.

OK, maybe it is firefox version, that one is 3.6.28. Maybe i will have
to fire up an XP -- ooh that might be a problem, i may not have any
hardware that will run it any more. And XP in a VM is not the same
creature.

This is Firefox version 13.0.1

Isn't that still in beta test?

?-)

Michael A. Terrell · Jul 4, 2012

josephkk wrote:

Michael A. Terrell wrote:

This is Firefox version 13.0.1

Isn't that still in beta test?

It is the version offered on their home page, without their usual
flag for beta versions.

josephkk · Jul 6, 2012

On Wed, 04 Jul 2012 16:11:35 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

josephkk wrote:

Michael A. Terrell wrote:

This is Firefox version 13.0.1

Isn't that still in beta test?

It is the version offered on their home page, without their usual
flag for beta versions.

Yep. The pushed update ads are still for 12 though. Disfortunatly they
haven't improved on the 3.* experience from my POV.

?-)

Michael A. Terrell · Jul 6, 2012

josephkk wrote:

On Wed, 04 Jul 2012 16:11:35 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

josephkk wrote:

Michael A. Terrell wrote:

This is Firefox version 13.0.1

Isn't that still in beta test?

It is the version offered on their home page, without their usual
flag for beta versions.

Yep. The pushed update ads are still for 12 though. Disfortunatly they
haven't improved on the 3.* experience from my POV.

I had just installed Firefox on this computer, so I used the default
version. This is identical to the computer that failed on me, last
month and will be my spare after I recap the other system. I have to
get the email & news archive off the drive that was in that system and
onto my network drives.

Don Kuenz · Jul 16, 2012

Carson Chittom <carson@wistly.net> writes:

Kurt Busiek <kurt@busiek.com> writes:

You, on the other hand, are a rascally, worsted-stocking knave, and an
eater of broken meats.
I'm fairly sure I'm going to regret asking, but how does one *break*
meat?

Yeah, I always wondered about that myself. Perhaps Shakespeare meant
a savage who dispenses with cutlery and instead simply rips raw meat
chunks from a carcass.

A buddy of mine used to live on a Caribbean island. He told me about
the local butcher simply slamming down a dull cleaver on a side of
beef to cut off portions for customers. The cleaver shattered bones
and left lots of tooth breaking chips sprinkled in the meat.

--
Don Kuenz

Jasen Betts · Jul 16, 2012

On 2012-07-16, Don Kuenz <garbage@crcomp.net> wrote:

Carson Chittom <carson@wistly.net> writes:
Kurt Busiek <kurt@busiek.com> writes:

You, on the other hand, are a rascally, worsted-stocking knave, and an
eater of broken meats.
I'm fairly sure I'm going to regret asking, but how does one *break*
meat?

Yeah, I always wondered about that myself. Perhaps Shakespeare meant
a savage who dispenses with cutlery and instead simply rips raw meat
chunks from a carcass.

In shakespeare's day meat didn't only mean animal flesh, but also included
other foods like bread,

And in 1608 when king lear was published very few english people (if any)
ate with a fork.

http://larryavisbrown.homestead.com/files/lear/lear_IIb_notes.htm#broken%20meats

A buddy of mine used to live on a Caribbean island. He told me about
the local butcher simply slamming down a dull cleaver on a side of
beef to cut off portions for customers. The cleaver shattered bones
and left lots of tooth breaking chips sprinkled in the meat.

I had a chicken curry in Fiji in 1981 that had bone bits in it.

Tooth enamel is harder than bone,

--
ââ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---

Spehro Pefhany · Jul 16, 2012

On Sun, 15 Jul 2012 21:45:38 -0500, Don Kuenz <garbage@crcomp.net>
wrote:

Carson Chittom <carson@wistly.net> writes:
Kurt Busiek <kurt@busiek.com> writes:

You, on the other hand, are a rascally, worsted-stocking knave, and an
eater of broken meats.
I'm fairly sure I'm going to regret asking, but how does one *break*
meat?

Yeah, I always wondered about that myself. Perhaps Shakespeare meant
a savage who dispenses with cutlery and instead simply rips raw meat
chunks from a carcass.

A buddy of mine used to live on a Caribbean island. He told me about
the local butcher simply slamming down a dull cleaver on a side of
beef to cut off portions for customers. The cleaver shattered bones
and left lots of tooth breaking chips sprinkled in the meat.

The Chinese way of cutting chicken etc. is pretty much that way
(except that the cleaver is kept sharp). Right through the bones and
all.

http://www.youtube.com/watch?v=gd3npEWPz0A

Jul 21, 2012

There are many good points made below but I think that they mostly miss the mark. I have seen 2nd harmonic of the 455 kc IF frequency cause interference in the old 5 tube house radios at 910 kc. It causes annoying beats as the dial is moved slightly from proper frequency. The 2nd harmonic of the 262.5 kc IF appears at 525 kc which is below the lowest AM frequency of 540 kc.

In addition the lower IF frequency simplifies accurate tracking and allows greater selectivity for reduced IF bandwidth. This is important for reception of weak distant stations as you drive thru various towns with strong local stations.

WB0KVV

Robert Baer · Jul 21, 2012

trojancowboy@gmail.com wrote:

There are many good points made below but I think that they mostly miss the mark. I have seen 2nd harmonic of the 455 kc IF frequency cause interference in the old 5 tube house radios at 910 kc. It causes annoying beats as the dial is moved slightly from proper frequency. The 2nd harmonic of the 262.5 kc IF appears at 525 kc which is below the lowest AM frequency of 540 kc.

In addition the lower IF frequency simplifies accurate tracking and allows greater selectivity for reduced IF bandwidth. This is important for reception of weak distant stations as you drive thru various towns with strong local stations.

WB0KVV
Cannot say about modern car radios, but in the tube daze, the 262KC

IF was not common.
If one has a beat problem at 910KC, it is simple to re-align the IF
so harmonic is off-station; a good tech could do that in a few minutes
with no extra electronic aids.
Your beef seems to be almost pointless.

Michael A. Terrell · Jul 21, 2012

Robert Baer wrote:

trojancowboy@gmail.com wrote:
There are many good points made below but I think that they mostly miss the mark. I have seen 2nd harmonic of the 455 kc IF frequency cause interference in the old 5 tube house radios at 910 kc. It causes annoying beats as the dial is moved slightly from proper frequency. The 2nd harmonic of the 262.5 kc IF appears at 525 kc which is below the lowest AM frequency of 540 kc.

In addition the lower IF frequency simplifies accurate tracking and allows greater selectivity for reduced IF bandwidth. This is important for reception of weak distant stations as you drive thru various towns with strong local stations.

WB0KVV
Cannot say about modern car radios, but in the tube daze, the 262KC
IF was not common.

It was, in Delco car radios, and it was 262.5 KHz

Fred Abse · Jul 21, 2012

On Fri, 20 Jul 2012 21:41:46 -0700, Robert Baer wrote:

Cannot say about modern car radios, but in the tube daze, the 262KC
IF was not common.
If one has a beat problem at 910KC, it is simple to re-align the IF
so harmonic is off-station; a good tech could do that in a few minutes
with no extra electronic aids.
Your beef seems to be almost pointless.

It was a practice with dual conversion mobile radios to crystal the second
oscillator the other side of the first IF, if you got a birdie on a
particular channel.

If you then got a birdie on another, you were stuffed.

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

Jeff Liebermann · Jul 21, 2012

On Fri, 20 Jul 2012 18:41:03 -0700 (PDT), trojancowboy@gmail.com
wrote:

Help!Why did car radios use 262.5 kc IF's?Can't get a straight answer!

Some idiot playing games (again). The thread was from 1998.
<https://groups.google.com/group/sci.electronics.design/browse_thread/thread/b99773bf53894e5a/0204fb66d6742287>

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Robert Baer · Jul 22, 2012

Michael A. Terrell wrote:

Robert Baer wrote:

trojancowboy@gmail.com wrote:
There are many good points made below but I think that they mostly miss the mark. I have seen 2nd harmonic of the 455 kc IF frequency cause interference in the old 5 tube house radios at 910 kc. It causes annoying beats as the dial is moved slightly from proper frequency. The 2nd harmonic of the 262.5 kc IF appears at 525 kc which is below the lowest AM frequency of 540 kc.

In addition the lower IF frequency simplifies accurate tracking and allows greater selectivity for reduced IF bandwidth. This is important for reception of weak distant stations as you drive thru various towns with strong local stations.

WB0KVV
Cannot say about modern car radios, but in the tube daze, the 262KC
IF was not common.

It was, in Delco car radios, and it was 262.5 KHz
E Plurbus Unim

Driver to drive?

John Larkin

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Bob Pownall

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josephkk

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Jim Thompson

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Michael A. Terrell

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josephkk

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Michael A. Terrell

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josephkk

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Michael A. Terrell

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josephkk

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Michael A. Terrell

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Don Kuenz

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Jasen Betts

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Spehro Pefhany

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Robert Baer

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Michael A. Terrell

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Fred Abse

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