mikek said:
After many advices, I am decided to buy my 1st book about electronics: "the art of electronics" by Horowitz and Hill.
It's an expensive one (75$), so I won't buy dozens of books for the momment
Does it deal about noise? Or will I have to buy the one you told me too?
Bricolo said:
After many advices, I am decided to buy my 1st book about electronics: "the art of electronics" by Horowitz and Hill.
It's an expensive one (75$), so I won't buy dozens of books for the momment
Does it deal about noise? Or will I have to buy the one you told me too?
Horowitz deals with noise...so don't buy Mochenbacher...just yet...
http://www.schuro.de/Daten/Japanhalbleiter/2SK389.pdf
http://www.schuro.de/japan-dat.htm
Only 389 unfortunately,
http://www.schuro.de/japan-dat.htm
Only 389 unfortunately,
Andy:
Congratulations on you-know-what.
I believe that the 2SK146 was discontinued eons ago, and the 2SK389 was also phased out of production a few years back.
The 2SK389 sheet:
http://ezphysics.nchu.edu.tw/prophys/ael/File/Datasheet/2SK389.pdf
Some mention of 2SK147 here:
http://www.s-direktnet.de/homepages/sangmeister/daten/halbl/t2sk.htm
Spice models:
http://www.madlabo.com/mad/edat/spice/fet/
hth, jonathan carr
Congratulations on you-know-what.
I believe that the 2SK146 was discontinued eons ago, and the 2SK389 was also phased out of production a few years back.
The 2SK389 sheet:
http://ezphysics.nchu.edu.tw/prophys/ael/File/Datasheet/2SK389.pdf
Some mention of 2SK147 here:
http://www.s-direktnet.de/homepages/sangmeister/daten/halbl/t2sk.htm
Spice models:
http://www.madlabo.com/mad/edat/spice/fet/
hth, jonathan carr
datasheets
Dear ALW,
Here they are:
for 2SK389
ezphysics.nchu.edu.tw/prophys/ael/File/Datasheet/2SK389.pdf
and for the nearest equivalent of 2SK146
http://www.interfet.com/pdf/DS_IFN146.pdf
Dear ALW,
Here they are:
for 2SK389
ezphysics.nchu.edu.tw/prophys/ael/File/Datasheet/2SK389.pdf
and for the nearest equivalent of 2SK146
http://www.interfet.com/pdf/DS_IFN146.pdf
I see this same link also has the complement part's data sheet:
2SJ109
Nice find, UrSv!
And somebody will ask eventually, anyways
mlloyd1
2SJ109
Nice find, UrSv!
And somebody will ask eventually, anyways
mlloyd1
UrSv said:
Documents on noise from the noise on the net
I am not sure if there were anyone else than jam, Bricolo and
me being interested in the noise theory and the question John
challenged us with, but for those of us who are interested and
didn't already know all about it I went hunting on the net and,
contrary to my previous attempts, managed to find some good
documents on amplifier and semiconductor noise. So those
who wish to learn more about the basic theory may find some
of the following documents helpful:
http://www.national.com/an/AN/AN-104.pdf
(deals with noise on amplifier level and defines the basic
theory needed for this)
http://www.eie.polyu.edu.hk/~ensurya/lect_notes/commun_cir/Ch3/Chapter3.htm
(defines and discusses noise sources in semiconductor devices)
http://www.teicontrols.com/notes/ElectronicCircuitsIIEE338K/ElectronicCircuitsII.pdf
(actually a compilation of diagrams and formulae on various
things, but also briefly defines the basic types of noise.)
http://www.teicontrols.com/notes/ElectronicCircuitsIIEE338K/NoiseReferral.pdf
(Another document discussing referral of noise sources to the
input, also covered in the National app note).
These documents resolve some of my previous confusion, at
least, since I falsely assumed it would be possible to arrive at
an answer to Johns question from the info he gave us. I now
realize he probably didn't mean that, since it seems we have
to make assumptions about the load resistance/impedance in
the two cases to be able to do a noise referral.
I also wasn't sure if the theory John presented dealt also with
burst and flicker noise. Checking with these documents shows
that not to be the case. An interesting question is thus whether
these noise mechanisms must also be considered or if they
can be ignored for audio purposes? One paper actually claims
burst noise to often be the dominant factor in JFETs and flicker
noise in MOSFETs.
Finally, I'd like to say that Johns question, and especially the
follow-up question, show great pedagogical insight. Thanks
for bothering about it.
I am not sure if there were anyone else than jam, Bricolo and
me being interested in the noise theory and the question John
challenged us with, but for those of us who are interested and
didn't already know all about it I went hunting on the net and,
contrary to my previous attempts, managed to find some good
documents on amplifier and semiconductor noise. So those
who wish to learn more about the basic theory may find some
of the following documents helpful:
http://www.national.com/an/AN/AN-104.pdf
(deals with noise on amplifier level and defines the basic
theory needed for this)
http://www.eie.polyu.edu.hk/~ensurya/lect_notes/commun_cir/Ch3/Chapter3.htm
(defines and discusses noise sources in semiconductor devices)
http://www.teicontrols.com/notes/ElectronicCircuitsIIEE338K/ElectronicCircuitsII.pdf
(actually a compilation of diagrams and formulae on various
things, but also briefly defines the basic types of noise.)
http://www.teicontrols.com/notes/ElectronicCircuitsIIEE338K/NoiseReferral.pdf
(Another document discussing referral of noise sources to the
input, also covered in the National app note).
These documents resolve some of my previous confusion, at
least, since I falsely assumed it would be possible to arrive at
an answer to Johns question from the info he gave us. I now
realize he probably didn't mean that, since it seems we have
to make assumptions about the load resistance/impedance in
the two cases to be able to do a noise referral.
I also wasn't sure if the theory John presented dealt also with
burst and flicker noise. Checking with these documents shows
that not to be the case. An interesting question is thus whether
these noise mechanisms must also be considered or if they
can be ignored for audio purposes? One paper actually claims
burst noise to often be the dominant factor in JFETs and flicker
noise in MOSFETs.
Finally, I'd like to say that Johns question, and especially the
follow-up question, show great pedagogical insight. Thanks
for bothering about it.
Re: Re: going by the book
Well, it's clear that I'm unable to be helpful in this situation. I hope you find the answers you are seeking.mikek said:I fear you've taken the remarks in Solomons paper out of their proper context...
It has been my interest to bring some of you up to date on how noise is generated in solid state components. I deliberately left out additional stages and 1/f, as well as popcorn noise, because they are relatively low in good quality parts at audio frequencies. RF, or test instrumentation, could be another matter entirely. Many of the contributions and references have been as good as I have seen anywhere. It is pointless to make a noisy circuit, if it can be avoided with a little knowledge of what is important. One thing that I often see is a relatively large resistor, (over 100 ohms) in series with many preamps. This can be good for RF control, but it can add significant noise to a phono stage, unnecessarily.
Re: Re: Re: going by the book
Thanks Joe......i hope so too....something tells me you're somewhere in the south east...or west of England?
Joe Berry said:
I hope you find the answers you are seeking.
Thanks Joe......i hope so too....something tells me you're somewhere in the south east...or west of England?
Malachiconstant...Fred Dieckmann said:What happens if we run the bipolar transistor at 100ua, instead of 1 ma?
Low transconductance.... the sin that dare not speak its name.
Fred
What the heck would you run a BJT at 100uA for....??
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Solid State
- power amp driver block topology?