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參數(shù)資料
| 型號(hào)： | TA2170FLG |
| 廠商： | Toshiba Corporation |
| 英文描述： | Low Current Consumption Headphone Amplifier (Built-in Input Selector) |
| 中文描述： | 低電流消耗耳機(jī)放大器（內(nèi)置輸入選擇） |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 235K |
| 代理商： | TA2170FLG |
TA2170FLG
2006-04-19
6
(2)
2-input mode
Attenuation to an input signal (dB)
BUF1
BUF2
Ach
Bch
Ach
MUTE SW
BUF3
Total gain
(dB)
Ach
MUTE1
MUTE1A
MUTE2
MUTE3
Bch
Ach
Bch
Bch
Input signal is applied to BUF 1 and BUF 2.
OFF
OFF
OFF
ON
6
6
6
6
0
0
OFF
OFF
OFF
OFF
9.5
9.5
9.5
9.5
3.5
3.5
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
6
9.5
6
3.5
0
Input signal is applied to BUF 1 and BUF 3.
OFF
OFF
ON
OFF
6
6
6
6
0
0
OFF
OFF
OFF
OFF
9.5
9.5
9.5
9.5
3.5
3.5
OFF
ON
ON
OFF
6
6
6
6
0
OFF
ON
OFF
OFF
9.5
9.5
9.5
9.5
3.5
Input signal is applied to BUF 2 and BUF 3.
ON
ON/OFF
OFF
OFF
6
6
6
6
0
0
OFF
ON
OFF
OFF
6
9.5
6
9.5
0
3.5
OFF
OFF
OFF
OFF
9.5
9.5
9.5
9.5
3.5
3.5
(3)
3-input mode
Attenuation to an input signal (dB)
BUF1
BUF2
Ach
Bch
Ach
9.5
9.5
9.5
MUTE SW
BUF3
Total gain
(dB)
Ach
MUTE1
MUTE1A
MUTE2
MUTE3
Bch
9.5
Ach
9.5
Bch
9.5
Bch
OFF
OFF
OFF
OFF
0
0
OFF
ON
OFF
OFF
9.5
9.5
9.5
9.5
9.5
3.5
0
2. Low-cut compensation
The low-frequency range can be decreased using an output-coupling capacitor and a load (f
c
=
50 Hz at C
=
100
μ
F, R
=
32
). However, since the capacitor is connected between the IC’s output pin (pin 2/4) and EQ
pin (pin 1/5), the low-frequency gain of the power amplifier increases, enabling low-cut compensation to be
performed. For the response of capacitors of different values, refer to Figure 1.
Figure 1. Capacitor Response
Frequency f (Hz)
RES – f
R
Coupling C
=
100
μ
F
RL
=
32
0.15
μ
F
4.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
2.0
10
50
100
500 1000
5000
0.1
μ
F
0.22
μ
F
No compensation
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