From: Jim Thompson
Subject: Re: SPICE?
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Date: Sun, 29 Sep 2002 18:17:06 GMT
NNTP-Posting-Date: Sun, 29 Sep 2002 14:17:06 EDT
Organization: Cox Communications
On Sun, 29 Sep 2002 18:50:16 +0100,
"Peter Nolan" ,
In Newsgroup: sci.electronics.design,
Entitled: "Re: SPICE?",
Wrote the following:
|I have the complete high-frequency equivalent circuit for the common-emitter
|amplifier in front of me along with formulae for the current and voltage
|gains(Electronics for the Physicist by Delaney).
How can you have a formula for the voltage gain without the device
being immersed into a network of source, source impedance and load
|I do not see however a
|comparison between theory and experiment. I have this thought in the back of
|my mind that it was not possible to model even a single transistor amplifier
|well but clearly I'm very much mistaken. The low frequency and high
|frequency equivalent circuits are different and I think this led me to
|believe that the entire frequency response is the result of stitching
|together these two responses and that seemed somehow unsatisfactory to me.
|You are far ahead of me on this although to be fair to myself I could get up
|to speed with further study.
|To email please remove x from firstname.lastname@example.org
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
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