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Old 11th April 2003, 08:51 AM   #1
Electrons are yellow and more is better!
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Default T-link attenuator with constant impedance

Hi!!

Does anybody have formulas handy for a T-link with constant impedance?

Rseries + Rground + Rseries + Rload.

The link has constant inimpedance seen from signal source and the load senses constant source impdance.

This is a very cool way to create a wide bandwidth, low noise binary attenuator, mostly used in RF attenuator.

First link attenuates 16 dB, next 8 dB, 4 dB 2 dB, 1 dB. The links are bypassed with a 2-pole chanhe over relay or switch.

I have paper deep down somewhere and I have even made such an attenuator but I came not further than the attenautor itself. The control section never saw the day of light. Here is a microcontroller perfect!
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Old 16th April 2003, 12:40 PM   #2
Electrons are yellow and more is better!
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Check this out!

The answer is here.
http://members.home.nl/myrnout/elek/eatten.html
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Old 7th October 2003, 12:29 PM   #3
Electrons are yellow and more is better!
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The page above is impossible to reach but if someone wants to take a look I have the page on my harddisk(Java script calculator).
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Old 7th October 2003, 01:14 PM   #4
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http://members.home.nl/mvanwesten/elek/eelek.html

Eric.
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Old 7th October 2003, 01:19 PM   #5
Electrons are yellow and more is better!
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http://members.home.nl/mvanwesten/elek/eatten.html

Thanks Eric.
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