Reply by Ian Field January 29, 20162016-01-29

"John Fields" <jfields@austininstruments.com> wrote in message 
news:m5glabtf3v8hd1eq511ei82pipqmj7gbfm@4ax.com...
> On Fri, 22 Jan 2016 18:53:46 -0000, "Ian Field" > <gangprobing.alien@ntlworld.com> wrote: > >> >> >>"John Fields" <jfields@austininstruments.com> wrote in message >>news:v282ab1njqbcvb0pp23358pnvf8d1driu8@4ax.com... >>> On Thu, 21 Jan 2016 08:37:38 -0800, John Larkin >>> <jjlarkin@highlandtechnology.com> wrote: >>> >>>>On Thu, 21 Jan 2016 10:29:03 -0600, John Fields >>>><jfields@austininstruments.com> wrote: >>>> >>>>>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" >>>>><gangprobing.alien@ntlworld.com> wrote: >>>>> >>>>>> >>>>>> >>>>>>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>>>>>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>>>>>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>>>>>> >>>>>>>> Does anyone know the correct name for the 2 transistor LC >>>>>>>> oscillator >>>>>>>> that looks like a long tailed pair? >>>>>>>> >>>>>>>> I though it was a Franklin oscillator - the google hits are >>>>>>>> ambiguous >>>>>>>> to >>>>>>>> say the least, but its possible I have the name wrong. >>>>>>>> >>>>>>>> Thanks for any help. >>>>>>> >>>>>>> I'm not sure that all the variants have names. Most of the >>>>>>> oscillators >>>>>>> got names back in the teens and twenties before there was a unified >>>>>>> theory of feedback in circuits, and when sustained radio oscillation >>>>>>> was >>>>>>> a Really Astonishing Thing. >>>>>> >>>>>>The oscillator I have in mind, I could almost draw from memory. >>>>>> >>>>>>But I'd like some point of reference so I can google for more info. >>>>> >>>>>--- >>>>>For a first shot, why not Google Google Images for "long-tailed pair >>>>>oscillator" and if that fails, then draw what you can remember and >>>>>post it here as a second shot? >>>>> >>>>>John Fields >>>> >>>>Why didn't you do that for us? Like, contribute? >>> >>> --- >>> Since I was replying to the OP, and not to your imginary cadre, "Us" >>> is supercilious and is designed to imply [unwarranted] support. >>> >>> A hint on how to get there on one's own _is_ a contribution, >> >>That had already been tried and didn't produce the required result. > > --- > Then why not post the circuit, or at least as much of it as you can > remember, and let us mull over it?
Because I eventually found it in my personal stash library, and someone posted the right answer next day as well. Admittedly my question was a bit vague - but it sorts out who's smart and who's less so.
Reply by John Fields January 28, 20162016-01-28
On Fri, 22 Jan 2016 18:53:46 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

> > >"John Fields" <jfields@austininstruments.com> wrote in message >news:v282ab1njqbcvb0pp23358pnvf8d1driu8@4ax.com... >> On Thu, 21 Jan 2016 08:37:38 -0800, John Larkin >> <jjlarkin@highlandtechnology.com> wrote: >> >>>On Thu, 21 Jan 2016 10:29:03 -0600, John Fields >>><jfields@austininstruments.com> wrote: >>> >>>>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" >>>><gangprobing.alien@ntlworld.com> wrote: >>>> >>>>> >>>>> >>>>>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>>>>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>>>>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>>>>> >>>>>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>>>>> that looks like a long tailed pair? >>>>>>> >>>>>>> I though it was a Franklin oscillator - the google hits are ambiguous >>>>>>> to >>>>>>> say the least, but its possible I have the name wrong. >>>>>>> >>>>>>> Thanks for any help. >>>>>> >>>>>> I'm not sure that all the variants have names. Most of the >>>>>> oscillators >>>>>> got names back in the teens and twenties before there was a unified >>>>>> theory of feedback in circuits, and when sustained radio oscillation >>>>>> was >>>>>> a Really Astonishing Thing. >>>>> >>>>>The oscillator I have in mind, I could almost draw from memory. >>>>> >>>>>But I'd like some point of reference so I can google for more info. >>>> >>>>--- >>>>For a first shot, why not Google Google Images for "long-tailed pair >>>>oscillator" and if that fails, then draw what you can remember and >>>>post it here as a second shot? >>>> >>>>John Fields >>> >>>Why didn't you do that for us? Like, contribute? >> >> --- >> Since I was replying to the OP, and not to your imginary cadre, "Us" >> is supercilious and is designed to imply [unwarranted] support. >> >> A hint on how to get there on one's own _is_ a contribution, > >That had already been tried and didn't produce the required result.
--- Then why not post the circuit, or at least as much of it as you can remember, and let us mull over it? John Fields
Reply by Ian Field January 22, 20162016-01-22

"John Fields" <jfields@austininstruments.com> wrote in message 
news:v282ab1njqbcvb0pp23358pnvf8d1driu8@4ax.com...
> On Thu, 21 Jan 2016 08:37:38 -0800, John Larkin > <jjlarkin@highlandtechnology.com> wrote: > >>On Thu, 21 Jan 2016 10:29:03 -0600, John Fields >><jfields@austininstruments.com> wrote: >> >>>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" >>><gangprobing.alien@ntlworld.com> wrote: >>> >>>> >>>> >>>>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>>>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>>>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>>>> >>>>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>>>> that looks like a long tailed pair? >>>>>> >>>>>> I though it was a Franklin oscillator - the google hits are ambiguous >>>>>> to >>>>>> say the least, but its possible I have the name wrong. >>>>>> >>>>>> Thanks for any help. >>>>> >>>>> I'm not sure that all the variants have names. Most of the >>>>> oscillators >>>>> got names back in the teens and twenties before there was a unified >>>>> theory of feedback in circuits, and when sustained radio oscillation >>>>> was >>>>> a Really Astonishing Thing. >>>> >>>>The oscillator I have in mind, I could almost draw from memory. >>>> >>>>But I'd like some point of reference so I can google for more info. >>> >>>--- >>>For a first shot, why not Google Google Images for "long-tailed pair >>>oscillator" and if that fails, then draw what you can remember and >>>post it here as a second shot? >>> >>>John Fields >> >>Why didn't you do that for us? Like, contribute? > > --- > Since I was replying to the OP, and not to your imginary cadre, "Us" > is supercilious and is designed to imply [unwarranted] support. > > A hint on how to get there on one's own _is_ a contribution,
That had already been tried and didn't produce the required result.
Reply by John Fields January 21, 20162016-01-21
On Thu, 21 Jan 2016 08:37:38 -0800, John Larkin
<jjlarkin@highlandtechnology.com> wrote:

>On Thu, 21 Jan 2016 10:29:03 -0600, John Fields ><jfields@austininstruments.com> wrote: > >>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" >><gangprobing.alien@ntlworld.com> wrote: >> >>> >>> >>>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>>> >>>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>>> that looks like a long tailed pair? >>>>> >>>>> I though it was a Franklin oscillator - the google hits are ambiguous to >>>>> say the least, but its possible I have the name wrong. >>>>> >>>>> Thanks for any help. >>>> >>>> I'm not sure that all the variants have names. Most of the oscillators >>>> got names back in the teens and twenties before there was a unified >>>> theory of feedback in circuits, and when sustained radio oscillation was >>>> a Really Astonishing Thing. >>> >>>The oscillator I have in mind, I could almost draw from memory. >>> >>>But I'd like some point of reference so I can google for more info. >> >>--- >>For a first shot, why not Google Google Images for "long-tailed pair >>oscillator" and if that fails, then draw what you can remember and >>post it here as a second shot? >> >>John Fields > >Why didn't you do that for us? Like, contribute?
--- Since I was replying to the OP, and not to your imginary cadre, "Us" is supercilious and is designed to imply [unwarranted] support. A hint on how to get there on one's own _is_ a contribution, so it seems to me like I did contribute, since I addressesd the OP's query and taught him how to fish instead of merely giving him a fish. John Fields
Reply by Ian Field January 21, 20162016-01-21

"Lund-Nielsen, Jorgen" <jorgen.lund-nielsen@xyz123desy.de> wrote in message 
news:dgbh8uF5oiqU1@mid.individual.net...
> Am 20.01.2016 um 19:59 schrieb Ian Field: >> Does anyone know the correct name for the 2 transistor LC oscillator >> that looks like a long tailed pair? >> >> I though it was a Franklin oscillator - the google hits are ambiguous to >> say the least, but its possible I have the name wrong. >> >> Thanks for any help. > > maybe Buttler osc.?
That's the one. It took over an hour sifting through my personal stash library to find it though! Thanks.
Reply by Ian Field January 21, 20162016-01-21

"bitrex" <bitrex@de.lete.earthlink.net> wrote in message 
news:gL6oy.164197$1g3.86849@fx03.iad...
> Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> > Wrote in message: >> On Wed, 20 Jan 2016 18:29:17 -0600, "Dave M" <dgminala@mediacombb.net> >> wrote: >> >>>Ian Field wrote: >>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>> that looks like a long tailed pair? >>>> >>>> I though it was a Franklin oscillator - the google hits are ambiguous >>>> to say the least, but its possible I have the name wrong. >>>> >>>> Thanks for any help. >>> >>> >>>I've seen them called differential pair oscillators. That what you're >>>looking for? >>> >>>Dave M >>> >> >> Differential oscillators... >> >> <http://www.analog-innovations.com/SED/MC1648-DataSheet.pdf> >> >> <http://www.analog-innovations.com/SED/Pat-3649929.pdf> >> >> ...Jim Thompson >> -- >> | James E.Thompson | mens | >> | Analog Innovations | et | >> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | >> | San Tan Valley, AZ 85142 Skype: skypeanalog | | >> | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | >> | E-mail Icon at http://www.analog-innovations.com | 1962 | >> >> I love to cook with wine. Sometimes I even put it in the food. >> > > Emitter coupled oscillators? Current-steering oscillators? > > Advantage that they don't disturb the power supply very much?
Did eventually find it - the Butler oscillator. Its the common base stage that drives the LC with high impedance - so very low loading. The other stage is common collector - so I'm hoping the transistors I picked are fast enough.
Reply by Ian Field January 21, 20162016-01-21

"Dave M" <dgminala@mediacombb.net> wrote in message 
news:PISdnSeWlrLDuz3LnZ2dnUU7-dudnZ2d@giganews.com...
> Ian Field wrote: >> Does anyone know the correct name for the 2 transistor LC oscillator >> that looks like a long tailed pair? >> >> I though it was a Franklin oscillator - the google hits are ambiguous >> to say the least, but its possible I have the name wrong. >> >> Thanks for any help. > > > I've seen them called differential pair oscillators. That what you're > looking for?
Turns out I was thinking of totally the wrong name - its a Butler oscillator I needed.
Reply by Ian Field January 21, 20162016-01-21

"John Larkin" <jjlarkin@highlandtechnology.com> wrote in message 
news:j622ab1albl9c829h30v9n9ah576vrb875@4ax.com...
> On Thu, 21 Jan 2016 10:29:03 -0600, John Fields > <jfields@austininstruments.com> wrote: > >>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" >><gangprobing.alien@ntlworld.com> wrote: >> >>> >>> >>>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>>> >>>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>>> that looks like a long tailed pair? >>>>> >>>>> I though it was a Franklin oscillator - the google hits are ambiguous >>>>> to >>>>> say the least, but its possible I have the name wrong. >>>>> >>>>> Thanks for any help. >>>> >>>> I'm not sure that all the variants have names. Most of the oscillators >>>> got names back in the teens and twenties before there was a unified >>>> theory of feedback in circuits, and when sustained radio oscillation >>>> was >>>> a Really Astonishing Thing. >>> >>>The oscillator I have in mind, I could almost draw from memory. >>> >>>But I'd like some point of reference so I can google for more info. >> >>--- >>For a first shot, why not Google Google Images for "long-tailed pair >>oscillator" and if that fails, then draw what you can remember and >>post it here as a second shot? >> >>John Fields > > Why didn't you do that for us? Like, contribute?
No need - it was one of the first things I tried. Getting the name I thought it was totally wrong didn't help of course. Its actually a Butler oscillator, and series fed is the variant I need. There are several references in my personal stash library - but it took over an hour of inspecting files to find them.
Reply by John Larkin January 21, 20162016-01-21
On Thu, 21 Jan 2016 10:29:03 -0600, John Fields
<jfields@austininstruments.com> wrote:

>On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field" ><gangprobing.alien@ntlworld.com> wrote: > >> >> >>"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >>news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >>> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >>> >>>> Does anyone know the correct name for the 2 transistor LC oscillator >>>> that looks like a long tailed pair? >>>> >>>> I though it was a Franklin oscillator - the google hits are ambiguous to >>>> say the least, but its possible I have the name wrong. >>>> >>>> Thanks for any help. >>> >>> I'm not sure that all the variants have names. Most of the oscillators >>> got names back in the teens and twenties before there was a unified >>> theory of feedback in circuits, and when sustained radio oscillation was >>> a Really Astonishing Thing. >> >>The oscillator I have in mind, I could almost draw from memory. >> >>But I'd like some point of reference so I can google for more info. > >--- >For a first shot, why not Google Google Images for "long-tailed pair >oscillator" and if that fails, then draw what you can remember and >post it here as a second shot? > >John Fields
Why didn't you do that for us? Like, contribute? -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by John Fields January 21, 20162016-01-21
On Wed, 20 Jan 2016 21:25:22 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

> > >"Tim Wescott" <seemywebsite@myfooter.really> wrote in message >news:ao-dnSQhGY-NdALLnZ2dnUU7-TednZ2d@giganews.com... >> On Wed, 20 Jan 2016 18:59:22 +0000, Ian Field wrote: >> >>> Does anyone know the correct name for the 2 transistor LC oscillator >>> that looks like a long tailed pair? >>> >>> I though it was a Franklin oscillator - the google hits are ambiguous to >>> say the least, but its possible I have the name wrong. >>> >>> Thanks for any help. >> >> I'm not sure that all the variants have names. Most of the oscillators >> got names back in the teens and twenties before there was a unified >> theory of feedback in circuits, and when sustained radio oscillation was >> a Really Astonishing Thing. > >The oscillator I have in mind, I could almost draw from memory. > >But I'd like some point of reference so I can google for more info.
--- For a first shot, why not Google Google Images for "long-tailed pair oscillator" and if that fails, then draw what you can remember and post it here as a second shot? John Fields