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| Single ended to differntial LPF - RF Cafe Forums | ||||||
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Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all the responses to the original posts. ljoseph Post subject: Single ended to differntial LPF Posted: Wed Aug 19, 2009 3:02 pm Captain Joined: Tue Sep 04, 2007 7:54 am Posts: 13 Location: Dallas Hi, I have calculated the values for a 230 Mhz LPF for single ended configuration with source and load impedance of 100 ohms. I want o convert this filter to differential. How to convert the L and C values from single ended to differential? Single ended filter values (5 pole butterworth) L1=30nH L2=16nH C1=29pF C2=27pF C3=6pF Top Paul Chriss Post subject: Re: Single ended to differntial LPFPosted: Mon Sep 21, 2009 10:41 pm Captain Joined: Sat Mar 04, 2006 10:12 am Posts: 8 I swear I don't work for them, but I just did a Google Search and found this program that does the job. http://www.appliedmicrowave.com/Filter1B.htm Maybe you can downlaod a trial version? Top Alberto Post subject: Re: Single ended to differntial LPFPosted: Wed Oct 07, 2009 6:05 pm Captain Joined: Sun Oct 04, 2009 5:17 pm Posts: 6 The 4 series inductors (2 for each branch of the differential filter) value will be equal to the single ended value divided by 2. In your case L1a = 15 nH L1b = 15 nH L2a = 8 nH L2b = 8 nH Capacitors, instead, will keep their original value: C1 = 29 pF C2 = 27 pF C3 = 6 pF Best regards, Alberto Posted 11/12/2012 | ||||||
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