參數(shù)資料
型號: TDA9875
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: Digital TV Sound Processor DTVSP
中文描述: SPECIALTY CONSUMER CIRCUIT, PDIP64
文件頁數(shù): 75/92頁
文件大小: 279K
代理商: TDA9875
1998 Feb 13
75
Philips Semiconductors
Preliminary specification
Digital TV Sound Processor (DTVSP)
TDA9875
10.3.40 B
ASS BOOST CONTROL REGISTER
10.3.40.1 Description
This register is used to select from a few sample bass boost settings to modify the frequency characteristics of the Main
channel (shelving filter). Bits B3 to B0 apply to the left channel, bits B7 to B4 apply to the right channel. This function
must be used with care in order to avoid clipping distortion at high volume settings.
More sophisticated control of the bass boost filter can be exercised in the expert mode (see Section 10.5). The user then
has full control over this 2nd-order filter and can, within limits, realize bass equalizers with arbitrary centre frequencies,
Q factors and boost/cut settings.
10.3.40.2 Definition
Table 88
Subaddress 45 (note 1; see Table 89)
Note
1.
The default setting at power-up is 00000000.
Table 89
Gain setting
MSB
LSB
B7
B6
B5
B4
B3
B2
B1
B0
B7, B3
B6, B2
B5, B1
B4, B0
GAIN SETTING
(dB)
CORNER FREQUENCY
(Hz)
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
20
18
16
14
12
10
8
6
4
2
0
350
350
350
350
350
350
350
350
350
350
350
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