Looking for Transistor based Gyrator info. Any "Wireless World" collectors out there? - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th November 2008, 11:18 PM   #1
diyAudio Member
 
Join Date: Jun 2008
Default Looking for Transistor based Gyrator info. Any "Wireless World" collectors out there?

I'm trying to find detailed design information on Transistor based Gyrators but web searches turn up very little.
I did find some references to articles and I'm wondering if anyone has either of:

Electronics World and Wireless World, May 1992

Wireless World, Feb 1967

and also

Electronics Letters, Vol. 3, No. 2, Feb 1967

and if so could you be persuaded to post a scan?

Thanks for any and all help.
  Reply With Quote
Old 28th November 2008, 12:30 AM   #2
diyAudio Member
 
Join Date: Sep 2003
Location: earth
Default try this for the Riordan paper

http://www.corybas.com/Papers/Publications.htm
  Reply With Quote
Old 28th November 2008, 01:13 AM   #3
diyAudio Member
 
scott wurcer's Avatar
 
Join Date: Jan 2004
Location: cambridge ma
Wow, the three-legged op-amp dates back to 1967 (probably before).
__________________
"This logos holds always but humans always prove unable to understand it, both before hearing it and when they have first heard it."
  Reply With Quote
Old 28th November 2008, 01:28 AM   #4
diyAudio Member
 
Join Date: Jun 2008
yeah, the earliest Gyrator reference I've found so far is
Tellegen, B.D.H., "The Gyrator, a New Electric Network Element," Philips Research Reports, Vol. 3, No. 2, Apr 1948 !

. . . .but coming up with the actual articles is another story. IEEE Explore has a lot of them locked up.
  Reply With Quote
Old 28th November 2008, 02:31 PM   #5
diyAudio Member
 
Pjotr's Avatar
 
Join Date: Nov 2002
Location: Netherlands
Quote:
Originally posted by scott wurcer
Wow, the three-legged op-amp dates back to 1967 (probably before).
Yes, in the early '60-ties Analog Devices did put complete differential amplifiers made of discrete components in small potted black boxes. These were intended for use in the “Analog Computers” of those days. I think Anolog Devices was it that called them “Operational Amplifier” because they were ready to use on an analog computer bread board.
  Reply With Quote
Old 28th November 2008, 03:47 PM   #6
diyAudio Member
 
scott wurcer's Avatar
 
Join Date: Jan 2004
Location: cambridge ma
Quote:
Originally posted by Pjotr


Yes, in the early '60-ties Analog Devices did put complete differential amplifiers made of discrete components in small potted black boxes. These were intended for use in the “Analog Computers” of those days. I think Anolog Devices was it that called them “Operational Amplifier” because they were ready to use on an analog computer bread board.
Ooops, foiled by my own jokes. I was referring to the input stage with three outputs the middle one is common mode feedback, the picture is buried in that link somewhere.
__________________
"This logos holds always but humans always prove unable to understand it, both before hearing it and when they have first heard it."
  Reply With Quote
Old 28th November 2008, 04:01 PM   #7
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally posted by Hearinspace
yeah, the earliest Gyrator reference I've found so far is
Tellegen, B.D.H., "The Gyrator, a New Electric Network Element," Philips Research Reports, Vol. 3, No. 2, Apr 1948 !

. . . .but coming up with the actual articles is another story. IEEE Explore has a lot of them locked up.
I have a .pdf of Tellegen's paper. Post an email address, and I'll send it to you (it's about 1.7 megabytes). You might want to doctor the email address so the spammers can't harvest it.
  Reply With Quote
Old 28th November 2008, 04:46 PM   #8
forr is offline forr  France
diyAudio Member
 
forr's Avatar
 
Join Date: Dec 2004
Location: Next door
Hi Hearinspace,

I have this one :

"The inverted world of gyrators"
by Dr C.O. Anazia
Electronics World and Wireless World, May 1992, pp414-417
Just the time to scan it.


Maybe the following ones would interest you too :

"Negative resistance in AF filters"
by John Dent
Electronics World + Wireless World, December 1989, pp1203-1207

"Lower THD form vintage designs"
(FDNR circuits)
by Rick Downs (EDN designers companion)
Electronics World, January 1995, pp52-54.

Another reference but I do not have the text :
"Modeling of a gyrator circuit"
by A. Antoniou
Wireless World, September 1973.

Email me.
  Reply With Quote
Old 28th November 2008, 04:50 PM   #9
poynton is offline poynton  United Kingdom
diyAudio Member
 
poynton's Avatar
 
Join Date: Mar 2005
Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
What about this :?

http://www.epanorama.net/documents/telecom/gyrator.html


Andy
__________________
If it ain't broke, break it !! Then fix it again. It's called DIY !
  Reply With Quote
Old 28th November 2008, 11:18 PM   #10
diyAudio Member
 
Join Date: Jun 2008
Quote:
Originally posted by poynton
What about this :?
http://www.epanorama.net/documents/telecom/gyrator.html
Andy
Hi Andy,
Thanks!
That's an appealing circuit but I like to learn how to make something I can use for high bandwidth and more current and the drop across that (47 Ohm) series resistor makes for a loss I'd rather do without. I'm guessing that whatever it is will have to use more than one transistor.
This is all coming out of Rod Coleman's filament supply and it has me interested in learning more about Gyrators in general. On a search I did a while back I found a couple of older articles that put the capacitance multiplier in the Gyrator category - but as the Gyrator is called an impedance inverter (ie. use C as L or L as C) I think that might be argued. Anyway, the whole thing's is fascinating and I'd like to learn more. . . .


Hey Pjotr!
First use of "Operational Amplifier" was in 1947 !
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
70cm tall, 3 way, diy speakers based on 10"/4"/1" japanese ken brown drivers. facundonu Multi-Way 34 9th March 2009 04:59 AM
can one buy a head phone "wireless" converter cord? joywrex Parts 0 14th June 2003 04:41 PM


New To Site? Need Help?

All times are GMT. The time now is 11:40 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2