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TA2160FNG データシート(PDF) 8 Page - Toshiba Semiconductor

部品番号 TA2160FNG
部品情報  Low Consumption Current Stereo Headphone Amplifier (1.5/3 V use)
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メーカー  TOSHIBA [Toshiba Semiconductor]
ホームページ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TA2160FNG データシート(HTML) 8 Page - Toshiba Semiconductor

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TA2160FNG
2004-05-11
8
The transfer function of bass boost is as follows from Figure 3.
G (ω) = G1 (ω)·A1·G2 (ω)·G3 (ω)·A2
The bass boost effect is changed by external resistor or external capacitor. The transfer
function and cutoff frequency are as follows.
i
Transfer function of LPF
G1 (ω) = 1/(1 + jωC1·R1)
fL = 1/2πC1·R1
ii
Transfer function of BPF
G3 (ω) = jωC4·R5/[1 + jω (R4·C3 + R5·C3 + C4·R4) − ω2R4·C3·R5·C4]
C4
R5
C3
R4
1/2
fO
=
π
iii
HPF gain and ct of frequency
G2 (ω) = 1 + R2/(R3 + 1/jωC2)
fHC = 1/(2πR3·C2)
C4
18
PWA
PWC
19
21
22
R4
= 22 kΩ
BST
23
R2
= 100 kΩ
ATT
24
2R1
22 k
2R1
22 k
8
11
G1 (ω)
LPF
G2 (ω)
HPF
A1
G3 (ω)
BPF
A2
Figure 3
Block Diagram of Bass Boost
Frequency
f
(Hz)
3
10
100
400
BPF
−20
−10
0
10
20
−30
30
LPF
HPF
Total characteristic
fO
fL
A
Ra
Ca
Cb
Rb
Figure 4
BPF
Graph 1
Characteristic of Bass Boost


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