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BA3812L Datasheet(HTML) 5 Page - Rohm

Part No. BA3812L
Description  5-channel graphic equalizer
Download  6 Pages
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Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
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BA3812L Datasheet(HTML) 5 Page - Rohm

  BA3812L Datasheet HTML 5Page - Rohm  
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CR1
CO RO
1
2
π R0R1CC0
449
Audio ICs
BA3812L
FSolid-state inductor
A solid state inductor uses an active element and has the
equivalent function of an inductor. The circuit shown in
Fig. 4 is used in the BA3812L. This circuit employs two
capacitors, a potentiometer, and a bias capacitor as ex-
ternal components, everything else is on the chip.
The resonance frequency (fo) and the Q of the circuit are
fixed by the values of the external capacitors.
The circuit Q is obtained from the following formula:
Q =
The resonance frequency is obtained from the following
formula:
fo (Hz) =
(R:
Ω, C: F)
Q is the factor that determines the bandwidth of the fre-
quency. If the amount of boost and cut are the same for
the same resonance frequency, the larger the value of Q,
the narrower the resonant frequency band.
FElectrical characteristic curves


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