1MHz Voltage Controlled Oscillator

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I need a design for 1MHz to 2MHz Voltage controlled oscillator for
square wave which uses op-amp. Any help is appreciated...thank you


Re: 1MHz Voltage Controlled Oscillator



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Just buy an MC4024... 3.5:1 tuning range

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator


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   Wasn't that designed by some old curmudgeon?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
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Re: 1MHz Voltage Controlled Oscillator


On Sat, 23 Dec 2006 01:28:49 GMT, "Michael A. Terrell"

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Yep.  A REALLY OLD curmudgeon.  MRI next week to look at why I've
developed leg pain in my left leg only... sufficient pain to make me
limp :-(

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator


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   I'll pray for you, my freind.  I have swelling and pain in both legs
too, but you're the one who claims to be older than dirt. ;-)


   PS, don't tell them how many parts of the MRI machine you designed.
They don't like it when the patient knows how their toys work. :(

Re: 1MHz Voltage Controlled Oscillator


On Sat, 23 Dec 2006 06:00:20 GMT, "Michael A. Terrell"

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Yep, I enjoy tweaking them.  Particularly the ultrasound stuff... NO
BRAND out there I didn't have a hand in the analog front-ends ;-)

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator



Jim Thompson wrote:
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I wonder if he did anything for the Hewlett-Packard ultrasound machines
they seem to use in Nijmegen? H-P did seem to have their own designers.

And Diagnostic Sonar in Edinburough, Scotland would probablyn not have
bothered either.

--
Bill Sloman, Nijmegen (but in Melbourne at the moment).


Re: 1MHz Voltage Controlled Oscillator


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Look out for that.  My dad had a clot down there (official disease name
escapes me, but will come back as soon as I send this...) and they
decided to 'bust' it with drugs.  Unfortunately, clot bits then decided
to move around, causing strokes and heart attacks for a few years.  Was
'the beginning of the end' for him...

but, that was 20 years ago, so hopefully they know a little more now!

Now,if I can just figure out what I did to my left knee... 8-)

Charlie

Re: 1MHz Voltage Controlled Oscillator


On Thu, 04 Jan 2007 13:59:24 -0800, Charlie Edmondson

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My MRI came back with L3-L4-L5-S1 disks are "protruding"... probably
from a teenage injury ~55 years ago when I took a tumble down the side
of a rocky creek bed and landed square on my tail bone :-(

Another appointment with the doctors on Tuesday.

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator


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That is one of the few times that I might recommend seeing a
chiropractor.  They can sometimes get the bones to line up better...

Charlie

Re: 1MHz Voltage Controlled Oscillator


On Fri, 05 Jan 2007 11:38:49 -0800, Charlie Edmondson

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My doc doesn't think this particular case is circulatory, based on
such old-fashioned things like comparing hair growth on the toes of
both legs... hair growth matches side-to-side, but right leg is just
fine.

What's scary is the doc issued me a _permanently_ disabled parking
tag, so I don't have to walk long distances :-(

When I had my heart attack (1998) I was given "tPA" which _dissolves_
clots.

I see a spine specialist on Tuesday.

Anyone here had bulging/protruding disk repair?

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator


says...
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Thrombosis?  Phlebitis? Thrombophlebitis?  ...not sure there is a
difference.
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The drugs are certainly better.
 
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I did mine twice last month.  ...and foot/ankle.  I'm fine now
though.

--
  Keith

Re: 1MHz Voltage Controlled Oscillator



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Phlebitis was it!  I think that the drugs they used then caused all
kinds of clots to bust loose, hence the problem.  My dad smoked, ate
plenty of beef (he ran a meat packing plant...) and drank enough beer to
probably cause problems.

In the case of my knee, I built me a castle-block wall along the side of
the yard, one foot high by ninety feet long.  Plenty of digging, liftin,
etc.  Probably hurt my knee kneeling on the ground placing the bottom
ones...

Charlie

Re: 1MHz Voltage Controlled Oscillator


On Fri, 05 Jan 2007 11:41:55 -0800, Charlie Edmondson

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I have a set of knee pads that I wear for such tasks as laying tile
flooring ;-)

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator



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I do too, but didn't get them out... 8-)

Charlie

Re: 1MHz Voltage Controlled Oscillator


"Michael A. Terrell" ( snipped-for-privacy@earthlink.net) writes:
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I couldn't remember whether it was the same guy who did the MC4044,
or some other guy.  I know that MC4044 guy did say something on
the matter in the past, but I can't remember what.  Something in
me says the MC4044 guy did the MC1648, but some other guy did
the MC4024, but maybe I have that reversed.

  Michael


Re: 1MHz Voltage Controlled Oscillator


On 23 Dec 2006 06:22:12 GMT, snipped-for-privacy@FreeNet.Carleton.CA (Michael Black)
wrote:

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Michael Black,  You completely missed Michael Terrell's joke...

*I'm* the "old curmudgeon" who designed the MC4024, the MC1648 AND the
analog sections of the MC4044 (I actually suggested the algorithm from
which the digital sections were developed... and coined the phrase
"charge pump" ;-)

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator



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And I thought it was Arnold in his first mainstream movie ;-)

But seriously, I believe the first thing that they called charge pump
(well, ok, in another language) was this one from the 30's:

http://upload.wikimedia.org/wikipedia/commons/1/12/Particle_accelerators_1937.jpg

Did you get the Chritsmas lights fixed?

--
Regards, Joerg

http://www.analogconsultants.com

Re: 1MHz Voltage Controlled Oscillator


On Sat, 23 Dec 2006 19:37:13 GMT, Joerg

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No, I turned them to the side so they're not seen ;-)

                                        ...Jim Thompson
--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Re: 1MHz Voltage Controlled Oscillator


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>
http://upload.wikimedia.org/wikipedia/commons/1/12/Particle_accelerators_1937.jpg
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   So, it was another problem with a Digit-al solution?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
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