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Article #15430Re: Query - How valves and transistors work
From: John Woodgate
Date: Sun, 03 Jan 1999 00:00
Date: Sun, 03 Jan 1999 00:00
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2541 bytes
<76nqh9$nf$2@computer.my.domain>, Duncan Barclay <dmlb@ragnet.demon.co.uk> wrote: >And the AC swing in vbe is still very small. You have linearised the BJT by >biasing it at a quiscent DC collector current. Small signal vs. large >signal. > >The decoupling of the emitter resistor ensures that the transconductance >for ac signals is gm=IC/VT=gm0 instead of gm=gm0/(1+gm0*RE). I think we could even agree on that. Even if you have used the wrong symbols. (;-) No, I *don't* want to start another argument over that. -- Regards, John Woodgate, Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. OOO - Own Opinions Only. You can fool all of the people some of the time, but you can't please some of the people any of the time.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,6f59d673fceaf3aa X-Google-Attributes: gid112d1e,public X-Google-Thread: 107d45,6f59d673fceaf3aa X-Google-Attributes: gid107d45,public X-Google-Thread: 10b271,6f59d673fceaf3aa X-Google-Attributes: gid10b271,public X-Google-Thread: fcc1a,6f59d673fceaf3aa X-Google-Attributes: gidfcc1a,public X-Google-Thread: 1118be,6f59d673fceaf3aa X-Google-Attributes: gid1118be,public X-Google-Thread: 1110fe,6f59d673fceaf3aa X-Google-Attributes: gid1110fe,public X-Google-Thread: 114713,6f59d673fceaf3aa X-Google-Attributes: gid114713,public X-Google-Thread: 111d0a,6f59d673fceaf3aa X-Google-Attributes: gid111d0a,public From: John Woodgate <jmw@jmwa.demon.co.uk> Subject: Re: Query - How valves and transistors work Date: 1999/01/03 Message-ID: <FPrSuoAyz$j2Ewpz@jmwa.demon.co.uk> X-Deja-AN: 428556705 Distribution: world X-NNTP-Posting-Host: jmwa.demon.co.uk:158.152.135.100 References: <368691bc.0@stargazer.actinet.net> <76b08g$jo4$1@news-1.news.gte.net> <76b8i0$rqm$1@computer.my.domain> <fuNEGVAumei2EwR5@jmwa.demon.co.uk> <76dss3$fhq$1@computer.my.domain> <d1dLzCAjKri2EwAr@jmwa.demon.co.uk> <76ibj9$rhc$1@computer.my.domain> <76ja03$gud$1@news-2.news.gte.net> <76jqau$ltt$1@computer.my.domain> <59q9yQA3Bdj2EwN3@jmwa.demon.co.uk> <76lqli$ra5$1@computer.my.domain> <ORcwZBAvyxj2Ewox@jmwa.demon.co.uk> <76nqh9$nf$2@computer.my.domain> X-Complaints-To: abuse@demon.net X-Trace: news.demon.co.uk 915432751 nnrp-02:20158 NO-IDENT jmwa.demon.co.uk:158.152.135.100 Organization: JMWA Electronics Consultancy MIME-Version: 1.0 Newsgroups: sci.physics,fj.sci.physics,sci.physics.electromag,tnn.physics,news.electronics.basics,sci.electronics.basics,sci.electronics.components,sci.electronics.design,sci.electronics.misc