From: Jim Thompson
Subject: Re: Problem with Spice simulation of Linkwitz-Riley filter
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Date: Wed, 18 Sep 2002 22:53:01 GMT
NNTP-Posting-Date: Wed, 18 Sep 2002 18:53:01 EDT
Organization: Cox Communications
On 18 Sep 2002 15:18:24 -0700,
In Newsgroup: sci.electronics.design,
Entitled: "Re: Problem with Spice simulation of Linkwitz-Riley
Wrote the following:
|firstname.lastname@example.org (Carlos) wrote in message news:...
|> Hi all,
|> I'm having a strange problem with a Spice simulation of a Lowpass 2nd
|> order Linkwitz-Riley filter (that's two 1st order Butterworth in
|> series). I have the evaluation version of Spice, which should work ok
|> with two opamps and such a simple circuit.
|Silly me. I used as power supplies those little +5 and -5 "bubbles".
|Don't know why, but even if the opamp is spec'd for +/-5 V supplies,
|you don't want to use those. Replaced them with proper VDC sources and
|it works ok now.
|Sorry about the bandwidth,
Part "Bubble" is just a label, but I've made a "Power" part by using
the Bubble shape and changing the template to be a voltage source...
very convenient for tight places on the schematic.
| 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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