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. https://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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