- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373542 > TA2131FN (Toshiba Corporation) Low Current Consumption Headphone Amplifier for Portable MD Player (With Bass Boost Function) PDF資料下載
參數(shù)資料
| 型號(hào)： | 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(jī)放大器MD播放機(jī)（帶低音提升功能） |
| 文件頁(yè)數(shù)： | 6/19頁(yè) |
| 文件大小： | 287K |
| 代理商： | TA2131FN |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)當(dāng)前第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)
TA2131FN
2002-04-19
6
Function Explanation
1. Bass Boost Function
1-1
Description of Operation
TA2131FN has a bass boost function for bass sound reproduction built-in to the power amplifier.
With the bass boost function, at medium levels and lower, channel A and channel B are added for the
low frequency component, and output to BST amplifier 2 (BST
2
) in negative phase. That signal is
inverted and added before being subjected to bass boost. If the signal of the low-frequency component
reaches a high level, the boost gain is controlled to main a low distortion (see Fig.1).
1-2
AGC Circuit
The AGC circuit of the bass boost function detects with “AGC DET” the voltage component created
by “BST
2
,” and as the input level increases, the variable impedance circuit is changed, and the bass
boost signal is controlled so that it is not assigned to BST amplifier 1. In this way, the bass signal to
“BST
2
” input is shut-off, and that boost gain is controlled.
Bass Boost System
1-3
As shown in Fig.1, the flow of the bass boost signal is that the signal received from power amplifier
input goes through LPF
1
, ADD amplifier, ATT (variable impedance circuit), BPF
1
(BST amplifier 1)
and LPF
2
, and the negative phase signal to the power amplifier input signal is output from BST
amplifier 2. The reason why it becomes the negative phase of the BST amplifier 2 signal is that the
phase is inverted by 180° in the audible bandwidth by the secondary characteristics of LPF
1
and
LPF
2
in Fig.1.
Ultimately the main signal and the bass boost signal formed before BST
2
are added.
Fig.2 shows the frequency characteristics to each terminal.
Figure 1 System Diagram of Bass Boost
V (R
L
)
DAC
OUT
2
22
21
2
V
ref
AGC
IN
6
4
ADD
LPF
2
BST OUT
BST NF
1
10
V
ref
IN
A
BST
AGC
BST
2
PW
A
PW
B
5
BST
1
11
9
8
7
4
R
L
IN
B
LPF
1
DET
OUT
B
BST
NF
2
OUT
A
2
2
1
1
1
10 k
10 k
15 k
10 k
15 k
10 k
10 k
20 k
2
20 k
10 k
12 k
5 k
20 k
30 k
16
220 F
1 F
220 F
2
0
0
V
ref
V
ref
V
ref
0
0
V (LPF
1
)
V (NF
1
)
V (LPF
2
)
V (BST OUT)
V (NF
2
)
V (OUT)
R
L
16
10 F
10 F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TA2132BF | AM/FM Radio IC |
| TA2132BP | AM/FM Radio IC |
| TA2136F | TOSHIBA Bipolar Liner Integrated Circuit Silicon Monolithic |
| TA2136N | TOSHIBA Bipolar Liner Integrated Circuit Silicon Monolithic |
| TA2145AF | 3 V Stereo Headphone Amplifier (3 V USE) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TA2136FG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Sound Retrieval System; 3D Sound IC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。