hi! i have this MS 20 filter project to do and i've been have some problems:<br>
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in this schematic i don't really understand the meaning of the symbol in the output of U1a and U1b.<br>
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"Vr" voltage is the ground voltage?<br>
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<font class="p" color="#cc0000"></font>between pin 7 and 8 ( and 10 and 9 ) it's a buffer circuit. should i use any specific kind of buffer?<br>
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Lm 136000 datasheet is not available, but i found a<a href="http://www.datasheetcatalog.com/datasheets_pdf/L/M/1/3/LM13600.shtml"> http://www.datasheetcatalog.com/datasheets_pdf/L/M/1/3/LM13600.shtml. </a><br>
is it the same?<br>
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thanks<br>
Diogo<br>
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