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Science Forum Index » Electronics - Misc Forum » Method and circuit to reduce Jitter?
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| Simon |
Posted: Wed Jan 17, 2007 8:24 am |
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Guest
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Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon |
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| PeteS |
Posted: Wed Jan 17, 2007 9:05 am |
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Guest
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Simon wrote:
Quote: Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon
Before trying to give specific advice, I'll point you at a decent
introduction to the subject:
http://www.highfrequencyelectronics.com/Archives/Apr04/HFE0404_Hancock.pdf
After that, we'd need a lot more information - PLLs have jitter that is
often worse than the driving input for instance, so they are not a
panacea.
Cheers
PeteS |
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| John Larkin |
Posted: Wed Jan 17, 2007 11:09 am |
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Guest
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On Wed, 17 Jan 2007 13:24:43 +0100, "Simon" <currypieker@arcor.de>
wrote:
Quote: Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon
Reduce jitter of what?
John |
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| Jim Thompson |
Posted: Wed Jan 17, 2007 11:14 am |
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Guest
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On Wed, 17 Jan 2007 07:09:52 -0800, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:
Quote: On Wed, 17 Jan 2007 13:24:43 +0100, "Simon" <currypieker@arcor.de
wrote:
Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon
Reduce jitter of what?
John
pre-exam ?:-)
...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. |
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| John Larkin |
Posted: Wed Jan 17, 2007 12:17 pm |
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Guest
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On Wed, 17 Jan 2007 08:14:52 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:
Quote: On Wed, 17 Jan 2007 07:09:52 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:
On Wed, 17 Jan 2007 13:24:43 +0100, "Simon" <currypieker@arcor.de
wrote:
Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon
Reduce jitter of what?
John
pre-exam ?:-)
...Jim Thompson
I used to actually enjoy Exam Week. About an hour before each test,
I'd sit under an oak tree, skim the textbook, take the test, and then
I'd have the rest of the day off. If I was in a playful mood, I'd
finish the test in a half hour and leave, which would freak everybody
else out and boost me on the curve. Having done electronics since I
was a kid, I knew what was important. To most of the other guys, all
this was a maze of equations without a lot of real meaning... I was
the *only* electronics hobbyist in my EE class. I took one electrical
machinery class, with an especially ornery instructor, where class
average on quizzes was 15%, so my 50% was an A.
He'd lecture:
"OK, will this motor rotate clockwise or counterclockwise? Show of
hands? OK, next subject..."
John |
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| Don Bowey |
Posted: Wed Jan 17, 2007 1:19 pm |
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On 1/17/07 4:24 AM, in article
45ae158b$0$5720$9b4e6d93@newsspool3.arcor-online.net, "Simon"
<currypieker@arcor.de> wrote:
Quote: Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
You should have begun with Google.
Quote:
Is there a method to reduce jitter without the use of PLL? Where can I find
sophisticated circuits for this?
Yes. Google.
Quote:
Any help, hints and comments are highly appreciated.
Greetings Simon
1. Search Google.
2. Pay some attention to the feedback filter.
Don |
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| CWatters |
Posted: Wed Jan 17, 2007 2:35 pm |
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Guest
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"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
Quote: I used to actually enjoy Exam Week. About an hour before each test,
I'd sit under an oak tree, skim the textbook, take the test, and then
I'd have the rest of the day off. If I was in a playful mood, I'd
finish the test in a half hour and leave,
There was a kid in my school who did that.. When the results can back it he
would get 150% right because he'd answered all the questions not just the 4
out of 6 that you were meant to. |
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| Joel Kolstad |
Posted: Wed Jan 17, 2007 3:49 pm |
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"CWatters" <colin.watters@turnersNOSPAMoak.plus.com> wrote in message
news:45ae6c78$0$8716$ed2619ec@ptn-nntp-reader02.plus.net...
Quote: There was a kid in my school who did that.. When the results can back it
he
would get 150% right because he'd answered all the questions not just the
4
out of 6 that you were meant to.
Most times when I've had an exam where it was, "answer x of y questions," if
you answered more than x it was the grader's call on which x of y they'd
grade, so you'd better be quite certain you answered them all correctly.
John probably had pretty good exams... ones where, if you truly understood
the material, you could answer all the questions quickly, whereas those who
needed to use the exam as "brief periods of intense learning," as a former
professor of mine used to call them , could use up all the allotted time.
Better professors would also sit there and work through the exam themselves
to make sure there weren't any errors or ommissions that had slipped in at
the last minute... that was a much better scenario than when there was some
critical piece of information missing -- but you thought you just weren't
getting it somehow, and had wasted a bunch of time trying to figure it
out --, and someone would finally go up and ask the prof. who'd then tell
the class, "Oh, sorry! Use such and such a value..." |
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| Richard Henry |
Posted: Wed Jan 17, 2007 4:33 pm |
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Guest
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John Larkin wrote:
Quote:
I used to actually enjoy Exam Week. About an hour before each test,
I'd sit under an oak tree, skim the textbook, take the test, and then
I'd have the rest of the day off. If I was in a playful mood, I'd
finish the test in a half hour and leave, which would freak everybody
else out and boost me on the curve. Having done electronics since I
was a kid, I knew what was important. To most of the other guys, all
this was a maze of equations without a lot of real meaning... I was
the *only* electronics hobbyist in my EE class. I took one electrical
machinery class, with an especially ornery instructor, where class
average on quizzes was 15%, so my 50% was an A.
He'd lecture:
"OK, will this motor rotate clockwise or counterclockwise? Show of
hands? OK, next subject..."
My first college room-mate was a mechanical engineering major. As
such, he was required to take a Freshman course titled "Engineering
Graphics", which had been taught by the same ancient professor for
decades. The professor allowed students to bring any materials they
wished to the final exam. So, of course, the engineering fraternity
sold a bound volume of all the problems ever given in the EG finals,
complete with worked out solutions.
There were some humorous twists: some of the solution sheets included
lines included like "Drop your pencil and pick it up", Lean back and
stretch" or "Smile and wave to the proctor". Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers. |
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| daestrom |
Posted: Wed Jan 17, 2007 9:20 pm |
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Guest
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"Richard Henry" <pomerado@hotmail.com> wrote in message
news:1169066011.124548.104610@m58g2000cwm.googlegroups.com...
Quote:
John Larkin wrote:
I used to actually enjoy Exam Week. About an hour before each test,
I'd sit under an oak tree, skim the textbook, take the test, and then
I'd have the rest of the day off. If I was in a playful mood, I'd
finish the test in a half hour and leave, which would freak everybody
else out and boost me on the curve. Having done electronics since I
was a kid, I knew what was important. To most of the other guys, all
this was a maze of equations without a lot of real meaning... I was
the *only* electronics hobbyist in my EE class. I took one electrical
machinery class, with an especially ornery instructor, where class
average on quizzes was 15%, so my 50% was an A.
He'd lecture:
"OK, will this motor rotate clockwise or counterclockwise? Show of
hands? OK, next subject..."
My first college room-mate was a mechanical engineering major. As
such, he was required to take a Freshman course titled "Engineering
Graphics", which had been taught by the same ancient professor for
decades. The professor allowed students to bring any materials they
wished to the final exam. So, of course, the engineering fraternity
sold a bound volume of all the problems ever given in the EG finals,
complete with worked out solutions.
There were some humorous twists: some of the solution sheets included
lines included like "Drop your pencil and pick it up", Lean back and
stretch" or "Smile and wave to the proctor". Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers.
LOL,
Wonder if any clueless student ever did copy them blindly. The prof
probably wondered, "What the h__??"
daestrom |
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| Rich Grise, Plainclothes |
Posted: Wed Jan 17, 2007 10:37 pm |
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Guest
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On Wed, 17 Jan 2007 20:20:19 -0500, daestrom wrote:
Quote: "Richard Henry" <pomerado@hotmail.com> wrote in message
John Larkin wrote:
...
He'd lecture:
"OK, will this motor rotate clockwise or counterclockwise? Show of
hands? OK, next subject..."
My first college room-mate was a mechanical engineering major. As
such, he was required to take a Freshman course titled "Engineering
Graphics", which had been taught by the same ancient professor for
decades. The professor allowed students to bring any materials they
wished to the final exam. So, of course, the engineering fraternity
sold a bound volume of all the problems ever given in the EG finals,
complete with worked out solutions.
There were some humorous twists: some of the solution sheets included
lines included like "Drop your pencil and pick it up", Lean back and
stretch" or "Smile and wave to the proctor". Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers.
LOL,
Wonder if any clueless student ever did copy them blindly. The prof
probably wondered, "What the h__??"
I wonder what the profs thought when a whole classful of students would
drop their pencils, or stretch, or smile and wave, simultaneously. ;-)
Cheers!
Rich |
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| CWatters |
Posted: Thu Jan 18, 2007 1:13 pm |
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Guest
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"Richard Henry" <pomerado@hotmail.com> wrote in message
news:1169066011.124548.104610@m58g2000cwm.googlegroups.com...
Quote: Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers.
Reminds me when I was a student...the landlady's kid was a brat. He
persuaded one of my friends to do his homework. Friend wrote the answers
into his exercise book in pencil so kid could go over it in ink. One day kid
came home and announced he was in big trouble and had been sent to see the
head. It turned out that my friend had written "teacher has cheesy feet"
right in the middle of the previous nights homework...and the brat had gone
over it in ink so it was in his own writing.  |
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| CWatters |
Posted: Thu Jan 18, 2007 1:15 pm |
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Guest
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"CWatters" <colin.watters@turnersNOSPAMoak.plus.com> wrote in message
news:45afab4d$0$8724$ed2619ec@ptn-nntp-reader02.plus.net...
Quote:
"Richard Henry" <pomerado@hotmail.com> wrote in message
news:1169066011.124548.104610@m58g2000cwm.googlegroups.com...
Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers.
Reminds me when I was a student...the landlady's kid was a brat. He
persuaded one of my friends to do his homework. Friend wrote the answers
into his exercise book in pencil so kid could go over it in ink. One day
kid
came home and announced he was in big trouble and had been sent to see the
head. It turned out that my friend had written "teacher has cheesy feet"
right in the middle of the previous nights homework...and the brat had
gone
over it in ink so it was in his own writing. :-)
Repeat out loud
Wa
Tana
Siam
Wa
Tana
Siam
etc |
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| Jim Thompson |
Posted: Thu Jan 18, 2007 1:30 pm |
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Guest
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On Thu, 18 Jan 2007 17:15:57 -0000, "CWatters"
<colin.watters@turnersNOSPAMoak.plus.com> wrote:
Quote:
"CWatters" <colin.watters@turnersNOSPAMoak.plus.com> wrote in message
news:45afab4d$0$8724$ed2619ec@ptn-nntp-reader02.plus.net...
"Richard Henry" <pomerado@hotmail.com> wrote in message
news:1169066011.124548.104610@m58g2000cwm.googlegroups.com...
Of course, you were
supposed to perform those acts, not copy them blindly into the test
papers.
Reminds me when I was a student...the landlady's kid was a brat. He
persuaded one of my friends to do his homework. Friend wrote the answers
into his exercise book in pencil so kid could go over it in ink. One day
kid
came home and announced he was in big trouble and had been sent to see the
head. It turned out that my friend had written "teacher has cheesy feet"
right in the middle of the previous nights homework...and the brat had
gone
over it in ink so it was in his own writing. :-)
Repeat out loud
Wa
Tana
Siam
Wa
Tana
Siam
etc
I don't remember that one. But I do remember the Order of Siam in Boy
Scouts...
Oh
Wa
Ta
Goo
Siam
...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. |
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| petrus bitbyter |
Posted: Thu Jan 18, 2007 8:18 pm |
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Guest
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"Simon" <currypieker@arcor.de> schreef in bericht
news:45ae158b$0$5720$9b4e6d93@newsspool3.arcor-online.net...
Quote: Hi,
I am an electrical engineering student and I am interested in circuit
design. Unfortunety I am not so familiar with analog design. Therefore I
want to place my question here in the newsgroup:
Is there a method to reduce jitter without the use of PLL? Where can I
find sophisticated circuits for this?
Any help, hints and comments are highly appreciated.
Greetings Simon
What have you done yourself before asking here? A lot of circuits introduce
jitter in a lot a signals and PLL is one of them. What circuit are you
talking about? Some years ago Electronics World had an article on reducing
jitter in signals. Being an electrical engineering student you should be
able to find this (and a lot more).
petrus bitbyter |
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