From: John Woodgate
Subject: Re: Transistor amplifiers v. frequency in SPICE
Date: Sun, 12 Jan 2003 18:02:38 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sun, 12 Jan 2003 21:38:44 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Kevin Aylward
wrote (in ) about 'Transistor amplifiers v. frequency in SPICE', on
Sun, 12 Jan 2003:
>John Woodgate wrote:
>> I read in sci.electronics.design that Paul Burridge
>> wrote (in
>> ) about 'Transistor
>> amplifiers v. frequency in SPICE', on Sat, 11 Jan 2003:
>>> In all cases, the input signal is a 0.002v p-p sine wave.
>>> At 100Khz, the output signal was a 1v p-p undistorted sine wave. All
>>> well and good.
>> You are asking for 500 times gain from a single stage? Forget it.
>> That's what comes from relying on simulation rather than real parts.
>Ahhmmm. This is nothing to do with simulation. A *correct* simulation
>will accuratly model the real world.
Yes, indeed. Here we have a simulation with out-of-the window component
values, giving an unrealistic result. A GIGO situation. My point,
perhaps badly expressed (me? Never!) is that a practical circuit
wouldn't give 500 times gain.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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