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3 band EQ

2017-12-22 04:26  
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       3 Band Equalizer                     

3_band_EQ.gif (9960 bytes)

  ??? ???????? ??????? ???????? ????? ????? ?????? , ?? ?? ????? ???????? ?? ?????????? ??? ???????, ??????? ??? ?????? ??????????, ???? ?????????? ???????. ? ???????? /??????? ?????? ?? ????????? ???? ??????? ??? ? 18 dB/Oct. ??? ??????? ? ?????????? ????? ?????????? ? 15V, ???? ?????? ?? ???????????? ??? ?? ???? ?????????? 9 ??? 30V, ????? ?? ???????? ? ?????????? 4 ??? IC1, ??? 0V ??? ???????? ?? ??????? ?? ???? ???????? ??? ????? 2, ???????? ?? ???? ??? ??????????? ???? ?? ???????????? ?????? ??? IC1, ??? 5 ??? 3 ??????????, ?? ????? ????? ??? ?????????? ???? ??.

  A classic circuit of regulation of tone of three way, with which we can regulate low, mid and high frequencies, of acoustic signal. The boost/cut can be regulated in the range of ? 18 dB/oct. In the circuit the supply is ? 15V, but can be also supplied with alone supply 9 until 30V, it is enough it is connected pin the 4 IC1, in the 0V and is connected the circuit with as it appears in fig. 2, giving half the supply in the not inverting entry of IC1, in the 5 and 3 equivalents, which are henceforth not connected in the ground.

3 Band EQ with single supply

R1-2= 47KohmsC1-11= 10uF 25VC8= 1.2nF 63V MKT
R3-4-5-12-13= 10KohmsC2= 33pF ceramicC9-10= 100nF 63V MKT
R6-7= 3.3KohmsC3= 2.2uF 63V MKTC12=47uF 25V
R8-9= 1.8KohmsC4= 47nF 63V MKTRV1-2= 100Kohms Lin.
R10= 270ohmsC5-7= 4.7nF 63V MKTRV3= 470Kohms Lin.
R11= 22KohmsC6= 22nF 63V MKTIC1=TL072,NE5532

Sam Electronic Circuits10/01

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