Forums

Oscillator type names.

Started by Ian Field January 20, 2016
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
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

"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.

"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.

"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.

"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.
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

"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.
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

"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.