From: Jim Thompson
Subject: Re: SPICE model of XTAL
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Date: Tue, 10 Dec 2002 15:22:05 GMT
NNTP-Posting-Date: Tue, 10 Dec 2002 10:22:05 EST
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On Tue, 10 Dec 2002 04:00:57 -0800,
Mike Monett ,
In Newsgroup: sci.electronics.design,
Entitled: "Re: SPICE model of XTAL",
Wrote the following:
|Allan Herriman wrote:
|> Is there any reason that you can't set the initial voltage (or
|> current) on one of the C or L elements to inject the right amount of
|> energy into the tank so that it starts oscillating at full amplitude
|> right after "turn on"?
|> This is something that you can do in simulation that you can't do in
|> real life.
|Very good suggestion. Yes, it works fine if you have access to the
|elements of the model. This means using a discrete version instead of a
If you use my PSpice crystal part, shown at....
Subject: SPICE model of XTAL - XtalPart.pdf
or a subcircuit equivalent for other Spices, you can vary Q, yet have
the crystal stay on frequency.
| 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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