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参数资料
| 型号： | TDA7410ND |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
| 封装： | LEAD FREE, SOP-20 |
| 文件页数： | 14/34页 |
| 文件大小： | 412K |
| 代理商： | TDA7410ND |
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TDA7410ND
Description of stereodecoder
To adjust the external LEVEL voltage to the internal range two values must be defined: the
LEVEL gain LG and VSBL. To adjust the voltage where the full channel separation is
reached (VST) the LEVEL gain LG has to be defined. The following equation can be used to
estimate the gain:
The gain can be programmed through 4 bits in the "Level Gain" byte. The MONO voltage
VMO (0dB channel separation) can be choosen selecting 33, 42, 50 or 58% of REF5V.
Figure 14.
Relation between internal and external LEVEL voltage and setup of Stereoblend
6.8
Highcut Control
The highcut control setup is similar to the stereoblend control setup : the starting point
VHCH can be set with 2 bits to be 42, 50, 58 or 66% of REF5V whereas the range can be
set to be 17 or 33% of VHCH (see Figure 15).
Figure 15.
Highcut characteristics
L
G
REF5V
Field strength voltage STEREO
[]
-----------------------------------------------------------------------------------------------
=
INTERNAL
VOLTAGES
t
D97AU639
VSBL
REF 5V
SETUP OF VST
INTERNAL
VOLTAGES
t
33%
REF 5V
SETUP OF VMO
LEVEL
LEVEL INTERN
FIELDSTRENGHT VOLTAGE
VST
VMO
LEVEL INTERN
42%
50%
58%
VSBL
VST
VMO
FIELDSTRENGHT VOLTAGE
LOWPASS
TIME CONSTANT
D97AU640
τDeemp
FIELDSTRENGHT
VHCH
VHCL
3
τDeemp
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