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10 years ago
-- If you get into the nitty-gritty of it, you'll find that there's no region of no phase shift which is larger than a point, but just a slope which might meet your requirements.
bandpass filter
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10 years ago
ou.
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yone
Hey great thread! (I've been away*, but I'll be home soon and I'm looking forward to looking at all the spice files.)
Jim, For myself I think about adding a band pass in front of a PLL (or lock
-in) when I run into dynamic range issues. Now most of the time I use a fa irly low Q BP to avoid the phase shift problem if the 'source' frequency dr ifts a bit. (or if the filter drifts some.) But if JL has got a circuit th at keeps the phase shift under control and lets you run at higher Q on the input BP... then that's a potential win. (At least that's what I see.) It is a fairly narrow application though.
Any other uses?
George H.
*slurping oysters on cape cod.. and other beach stuff.
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10 years ago
[snip]
That's what I suggested early on.
That's the problem. As I analyze it, as Q goes up, the flat range decreases. Q=10 looks good >:-}
Sounds like fun ;-) ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
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10 years ago
Well, I suppose nothing is ever absolutely perfect. But then, I'm an engineer, and you're not.
-- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
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10 years ago
Bwahahahahahahaha! Larkin, you are SO funny >:-} ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
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10 years ago
Perfection is the enemy of the good.
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10 years ago
For some things (like the mileage of a car, the efficiency of a power plant) a 20% improvement is huge. Sometimes some modest engineering, like my filter gadget maybe, can improve some performance by 20:1. It's not unusual for a bad circuit to give up 30 or 40 dB of s/n.
But there's no perfection. Some people here would claim that there's no such thing as a Butterworth filter, since no filter has that exact transfer function. Tedious gits.
-- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
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10 years ago
Obfuscation. ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
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10 years ago
See...
Newsgroups: alt.binaries.schematics.electronic Subject: Which Output Is With Improved Phase Shift? - WhichOutputIsWithImprovedPhaseShift.pdf Date: Thu, 15 Aug 2013 11:00:21 -0700 Message-ID: ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
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10 years ago
-- And, consequently, am not bound by your cookie-cutter rules.