NJW1149 Ver la hoja de datos (PDF) - Japan Radio Corporation
Número de pieza
componentes Descripción
Fabricante
NJW1149
Japan Radio Corporation
NJW1149 Datasheet PDF : 26 Pages
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NJW1149
PRELIMINARY
< Output Type >
OUTa
VOL2
VOL2
OUTb
LPF
AMP
High, Mid Lch.SP
LFINa
LFOUTa
Buffer
Buffer
LFINb
LFOUTb
AMP
AMP
Bass Lch. SP
Bass Rch. SP
OUTa
VOL2
VOL2
OUTb
AMP
Mixer
Lch. SP
LFINa
LFOUTa
Buffer
Buffer
LFINb
LFOUTb
AMP
SubWoofer
AMP
Fig 1. Bi-Amp
High, Mid Rch.SP
LPF
AMP
Fig 2. Sub-Woofer
Rch. SP
< OUT, LFIN, LFOUT Low Pass Filter Setting >
LPF cut off frequency and quality factor are adjusted by the external parts and given by the following
functions.
C1
17 LFINa
R1
R2 35 LFINb
16 OUTa
36 OUTb
C2
18 LFOUTa
34 LFOUTb
1
fc =
(Hz)
2π R1⋅ R2 ⋅ C1⋅ C2
1
Q=
C2 ⋅ R1
C1⋅ R2
+
C1⋅ R2
C2 ⋅ R1
–8–
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