参数资料
型号: TAS3103IDBTR
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO38
封装: GREEN, PLASTIC, TSSOP-38
文件页数: 144/148页
文件大小: 1247K
代理商: TAS3103IDBTR
336
SAP
Input
Port
Resolution
1
6
B
i
t
1
8
B
i
t
2
0
B
i
t
2
4
B
i
t
3
2
B
i
t
48-Bit
DAP
Word
40
39
0
8
7
Headroom
1
6
B
i
t
1
8
B
i
t
2
0
B
i
t
2
4
B
i
t
3
2
B
i
t
48-Bit
DAP
Word
47
44
43
0
8
7
16
DRC
Channel 1
Processing
Resolution
Headroom
24
Channel 2
Processing
0-dB Gain
24
47
Figure 322. DRC Input Word Structure for 0-dB Channel Processing Gain
The resulting DRC transfer function for the above parameters is shown in Figure 323. The threshold T2 is set at the
DRC rms input level of 50 dB, which corresponds to a 26-dB rms signal level at the SAP input. The
DRC-compensated output at T2 is cut 30 dB with respect to the 1:1 transfer function (O2 = 30 dB). The threshold T1
is set at the DRC rms input level of 125 dB, which corresponds to a 101-dB rms signal level at the SAP input. The
DRC-compensated output at T1 is boosted by 7.5 dB with respect to the 1:1 transfer function (O1 = 7.5 dB).
For thresholds, TdB = -6.0206TINPUT = -6.0206TSUB_ADDRESS_ENTRY.
Therefore,
T2 = 26 dB 24 dB = 50 dB
≥ T2INPUT
= 50/6.0206 = 8.30482
= 01000.0100_1110_0000_1000_1010_111
= 0x000004270457 in 25.23 format
T1 = 101 dB 24 dB = 125 dB
≥ T1INPUT = 125/6.0206 = 20.76205
= 010100.1100_0011_0001_0101_1011_010
= 0x00000A618ADA in 25/23 format
For offsets, O
INPUT +
1
6.0206
O
dB )
24.0824 .
Therefore, O2
INPUT +
1
6.0206
[30
) 24.0824] + 8.982892
+ 01000.1111_1011_1001_1110_1100_111
+ 0x0000047DCF67 in 25.23 format
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