參數(shù)資料
型號: TAS5715PHP
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 41.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
封裝: 7 X 7 MM, GREEN, PLASTIC, HTQFP-48
文件頁數(shù): 29/74頁
文件大?。?/td> 2771K
代理商: TAS5715PHP
O
u
tp
u
t
L
e
v
e
l
(d
B
)
Input Level (dB)
T
M0176-01
1:1 Transfer Function
Implemented Transfer Function
S
Z
–1
AlphaFilterStructure
w
a
B0265-05
Attack/Release
SofteningFilter
Threshold
DRC1
DRC2
0x3C
0x3B
0x40
0x43
0x3E
0x3F
www.ti.com
SLOS645 – AUGUST 2010
Automatic Gain Limit (DRC)
The DRC scheme has a single programmable threshold. There is one ganged DRC for the high-band left/right
channels and one DRC for the low-band left/right channels.
The DRC input/output diagram is shown in Figure 48.
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.
Each DRC has adjustable threshold levels.
Programmable attack, release, and softening-filter constants
Transparent compression: compressors can attack fast enough to avoid apparent clipping before engaging,
and decay times can be set slow enough to avoid pumping.
Figure 48. Automatic Gain Limit
T = 9.23 format, all other DRC coefficients are 3.23 format
Figure 49. DRC Filter Structure
DRC acts more like a gain limiter (automatic gain limiter, AGL). The block works to reduce the peak of energy if it
goes beyond the programmable threshold level. DRC starts an attack event (reduces gain) if energy goes above
the threshold. Similarly, it starts a release event if the level goes below the threshold (increases gain back to the
original value).
Copyright 2010, Texas Instruments Incorporated
35
Product Folder Link(s): TAS5715
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