2. Tone Control
a) Bass: Setting the Cut-off frequency
Bass Filter
12k 12k
8pin
23pin
C
b) Treble: Setting the Cut-off frequency
Treble Filter
10k
7pin
24pin
C
fC
=
2π
M
×C ×12k
M changes by gain setting of Tone.
M ≈ 2.65
M ≈ 3.45
M ≈ 8.10
(±15dB)
(±10dB)
(±5dB)
fC
=
2π
N
× C ×10k
N changes by gain setting of Tone.
N ≈ 0.76
N ≈ 0.58
N ≈ 0.25
(±15dB)
(±10dB)
(±5dB)
NJW1161
3. AUX1, AUX0 Terminal
AUX1/0 are enable to control external logic circuit is
Source current
: 1mA typ. (Ta=25˚C)
Sink current
: 0.5mA typ. (Ta=25˚C)
4. Capacitor for Reference Voltage (21pin)
22µF should be recommended for ripple filter connected to Vref terminal (21pin).
Reducing this capacity may cause to reduce the maximum attenuation level and to increase the output
noise.
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