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Old 17th February 2008, 03:34 PM   #1
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Default BCA filter

I try to simulate a simple half bridge LC filter, L=22uH, C=1uF, load=4ohm.
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Old 17th February 2008, 03:35 PM   #2
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The response is like this
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Old 17th February 2008, 03:35 PM   #3
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Now I add 2 diodes and 1 extra inductor, to make a BCA output stage.
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Old 17th February 2008, 03:38 PM   #4
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Why is the response become like this? The peak is about +18.5dB.
What is wrong with my SIM? Changin the values of L or C don't help.
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Old 17th February 2008, 04:28 PM   #5
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The Gate drive to both devices in BCA is always in phase and hence the devices conduct simuntaneously!! whereas your diagram shows simple complementary halfbridge, in which device conduction is based on appropriate polarity of signal with respect to channel polarity of device
Also the inductors used in BCA are atleast 220uH not 22uH.
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