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8th January 2009, 06:25 PM
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#1 |
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diyAudio Member
Join Date: Mar 2007
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My LM3886 Board Based On BR100 Schematic
Yesterday Designed LM3886 Board by BR100 Schematic.
 But dont know it is good design ;D Because i wanna order good quality pcb. It my first amplifier pcb  It Will be Bridged http://fenas.lt/Archive22.zip http://fenas.lt/4806_bottom_lg.png http://fenas.lt/4806_top_lg.png http://fenas.lt/top.png http://fenas.lt/bottom.png Best Regards gcds |
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8th January 2009, 07:31 PM
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#2 |
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diyAudio Member
Join Date: Jan 2006
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Looks good except that there is no decoupling-caps at V+ or V-, but im guessing that you will put them directly on pin?
One remark though: when using LM3886 in inverted mode you will have very low input impedance. Its not sure that all sources can handle that... |
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8th January 2009, 07:49 PM
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#3 | ||
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diyAudio Member
Join Date: Mar 2007
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Quote:
Quote:
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8th January 2009, 09:08 PM
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#4 | |
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diyAudio Member
Join Date: Jan 2006
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Quote:
Good with the caps A CD-player or a preamp or similar generally have a low output impedance (mostly 100R to 300R), and the amplifier have a high(er) input impedance (mostly 22K to 100K). Simplified this is to prevent the amplifier to draw energy from the source, since the source is not made to amplify that signal. That's the amplifiers job. There is other things to but I need to sleep so I just drop you some links http://en.wikipedia.org/wiki/Input_impedance http://in.answers.yahoo.com/question...1082801AAlSaU0 http://wiki.answers.com/Q/Why_do_amp...nput_impedance |
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