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11th April 2003, 08:51 AM
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#1 |
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Electrons are yellow
diyAudio Member
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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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/Per-Anders (my first name) or P-A as my friends call me BPA300 Group Buy Round 4, SMD-kit and DRV134 pcb, checking interest Sign up HERE Rectifier bridge RFB03 Group Buy Round 2, checking interest Sign up HERE |
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16th April 2003, 12:40 PM
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#2 |
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Electrons are yellow
diyAudio Member
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__________________
/Per-Anders (my first name) or P-A as my friends call me BPA300 Group Buy Round 4, SMD-kit and DRV134 pcb, checking interest Sign up HERE Rectifier bridge RFB03 Group Buy Round 2, checking interest Sign up HERE |
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7th October 2003, 12:29 PM
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#3 |
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Electrons are yellow
diyAudio Member
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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).
__________________
/Per-Anders (my first name) or P-A as my friends call me BPA300 Group Buy Round 4, SMD-kit and DRV134 pcb, checking interest Sign up HERE Rectifier bridge RFB03 Group Buy Round 2, checking interest Sign up HERE |
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7th October 2003, 01:14 PM
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#4 |
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diyAudio Member
Join Date: Feb 2002
Location: Perth, Australia.
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__________________
I believe not to believe in any fixed belief system. |
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7th October 2003, 01:19 PM
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#5 |
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Electrons are yellow
diyAudio Member
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__________________
/Per-Anders (my first name) or P-A as my friends call me BPA300 Group Buy Round 4, SMD-kit and DRV134 pcb, checking interest Sign up HERE Rectifier bridge RFB03 Group Buy Round 2, checking interest Sign up HERE |
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