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參數(shù)資料
| 型號： | TA2131FN |
| 廠商： | Toshiba Corporation |
| 英文描述： | Low Current Consumption Headphone Amplifier for Portable MD Player (With Bass Boost Function) |
| 中文描述： | 低電流消耗為便攜式耳機放大器MD播放機（帶低音提升功能） |
| 文件頁數(shù)： | 8/19頁 |
| 文件大?。?/td> | 287K |
| 代理商： | TA2131FN |
TA2131FN
2002-04-19
8
<Principle of Low-Pass Compensation>
The low-pass component alone is extracted from the composite signal of PW
A
/PW
B
output, and that
frequency signal is fed back to PW
A
/PW
B
once more via the inversion amplifier, thereby making it
possible to increase the gain only of the low-pass component. The frequency characteristics of the
power amplifier output V (OUT) in this state are shown in Fig.4 (b). In practice they are the
frequency characteristics (c) viewed from load terminal V (R
L
), and the low-pass is compensated
relative to the state in (a).
2-2. Low-Pass Compensation Condenser and Crosstalk
In this low-pass compensation condenser circuit, processing is carried out using the composite
signal of power amplifier output, so this affects crosstalk, according to the amount of compensation.
f characteristics and crosstalk generated by the capacity of the condenser for compensation (2-pin) are
shown below.
f (Hz)
G
V
(b)
(c)
(a)
1
10
100
1 k
10 k
100 k
0
10
20
20
10
Figure 4 Power Amplifier Frequency Characteristics
VCC1 2.8 V
VCC2 1.2 V
Rg 620
RL 16
Filter: LPF 80 kHz
Output C 220 F
10
0
10
10
30
100
300
1 k
3 k
10 k
30 k
C 0.47 F
C 2.2 F
C 1 F
Vref short
f (Hz)
R
Figure 5 Condenser and f Characteristics for Low-Pass Compensation
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相關代理商/技術參數(shù) |
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| TA2131FNG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Low Current Consumption Headphone Amplifier for Portable MD Player (With Bass Boost Function) |
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| TA2132BP | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:AM/FM Radio IC |
| TA2136F | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:TOSHIBA Bipolar Liner Integrated Circuit Silicon Monolithic |
| TA2136FG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Sound Retrieval System; 3D Sound IC |
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