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參數(shù)資料
| 型號： | TA2131FLG |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.008 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24 |
| 封裝： | 5 X 5 MM, 0.50 MM PITCH, PLASTIC, QON-24 |
| 文件頁數(shù)： | 20/21頁 |
| 文件大小： | 437K |
| 代理商： | TA2131FLG |
TA2131FLG
2006-04-19
8
2.
Low-Pass Compensation
2-1.
Function
In C-couple type power amplifiers, it is necessary to give the output condenser C a large capacity to
flatten out the frequency characteristics to the low frequency band (this is because the loss in the low
frequency bandwidth becomes larger due to the effect of the high-pass filter comprising C and RL).
Particularly when the headphone load is approximately 16
and an attempt is being made to achieve
frequency characteristics of
±3 dB at 20 Hz, a large capacity condenser of
C
= 470 F is required.
Bearing this situation in mind, a low-pass compensation function was built in to the TA2131FLG, and
while reducing the capacity of the output coupling condenser, almost flat (
±3 dB) frequency
characteristics in all audible bandwidths (20 Hz to 20 kHz) have been achieved.
Fig.3 shows the low-pass system diagram, and Fig.4 shows the frequency characteristics at each point.
In Fig.4, (a) represents the status lost by the low-pass as a result of the high-pass filter comprising
the headphone load (RL
= 16 ) and the output coupling condenser (220 F) in the C-coupling system.
DAC
OUT
20
k
22
21
2
Vref
ADD
Vref
INA
BST2
PWA
PWB
8
4
RL
INB
OUTB
BST
NF2
OUTA
20
k
10
k
10
k
10 k
10 k
15 k
10 k
15 k
10 k
10 k
20 k
16
220
F
220
F
V (OUT)
RL
16
20 k
20 k
1
F
10
F
10
F
V (RL)
Figure 3
Low-Pass Compensation System Diagram
f
(Hz)
G
V
(
d
B
)
1
10
100
1 k
10 k
100 k
60
40
20
0
20
40
V (OUT)
V (BST OUT)
V (LPF1)
V (NF1)
V (RL)
V (LPF2)
V (NF2)
Figure 2
During Bass Boost (Frequency Characteristics to Each Terminal)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TA2131FNG | 0.008 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TA2131FN | 0.008 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TA2132BFG | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO16 |
| TA2132BPG | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP16 |
| TA2142FN | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO30 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TA2131FN | 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) |
| 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) |
| TA2132BF | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:AM/FM Radio IC |
| 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 |
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