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From: "John Jardine"
Subject: Re: Limitations of the BC337
Date: Fri, 10 Jan 2003 02:00:12 -0000
NNTP-Posting-Date: 10 Jan 2003 01:46:19 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Jeff Verive wrote in message
> "John Jardine" wrote in message
> > This stuff is the magical part of analogue design and to get a decent
> > response you need to try a number of tricks/techniques. The easiest is
> > keep the gain low and design the collector resistance to be as low as
> > possible. Keep the source impedance as low as possible. Use 'R.F'
> > transistors with high Ft's and low collector-base capacitances. Keep the
> > collector strays and loading capacitances as low as possible.
> Hey, don't give away the secrets of those of us who stayed awake and
> worked out those multi-stage transistor amplifier designs by hand!
> Just kidding, although there seems to be quite a chasm between "digital"
> "analog" engineers. Luckily, as circuits get faster and faster, even the
> digital guys (and gals) have to stay awake in those boring analog courses.
> The bottom line: for circuits operating above 10kHz or so, ALWAYS consider
> parasitics, since they invariably add more poles (and an occasional hole)
> than the schematic shows.
I don't mind bumping into the poles, as I can spot 'em beforehand. It's
those damned hidden holes I keep falling in!.
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