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- From: joeld@hpnmdla.sr.hp.com (Joel Dunsmore)
- Date: Wed, 6 Jan 1993 04:37:31 GMT
- Subject: Re: Grounded Emitter Amplifier Query
- Message-ID: <7380103@hpnmdla.sr.hp.com>
- Organization: Hewlett-Packard, Santa Rosa, CA
- Path: sparky!uunet!gatech!usenet.ins.cwru.edu!agate!spool.mu.edu!wupost!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpl-opus!hpnmdla!joeld
- Newsgroups: sci.electronics
- References: <1992Dec29.214231.1135@inmet.camb.inmet.com>
- Lines: 12
-
- From Experience:
-
- The temperature dependence of Is is the key, and the bad thing it
- does is called thermal runaway. With a good transistor curve tester, this
- is easy to see.
-
- In very basic language, as the temperature goes up, so does the
- collector current, even for a constant base voltage. As the current goes
- up, so does the power dissipation. As the power goes up, so does the
- temperature. As the temperature goes up .....
-
- Been there, not good.
-