參數(shù)資料
型號: TAS3004PFB
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: GREEN, PLASTIC, TQFP-48
文件頁數(shù): 76/84頁
文件大?。?/td> 671K
代理商: TAS3004PFB
A–13
Table A–16. Time Constants
HEXADECIMAL VALUE
TIME DELAY
40
1.7 ms
50
3.5 ms
60
6.7 ms
70
13 ms
80
26 ms
90
53 ms
A0
106 ms
B0
212 ms
C0
425 ms
D0
850 ms
E0
1.7 s
F0
2.4 s
A.7.6
DRCE Example With Threshold at –12 dB
From the DRCE example shown in Figure A–2, the threshold is set at –12 dB. The input energy E, has a value of
–6 dB.
Output (dB) = [T(dB) + ( E(dB) – T(dB) ) x (1/CR)]
= [–12 + (–6 – (–12)) x (1/3)] dB
= –12 + 2 = –10 dB
Where:
CR = Compression Ratio
T = Threshold (dB)
E = Energy estimate of current input
Note: Energy of sine wave is approximately 3 dB lower than peak.
0 dB
Output (dB)
Threshold = –12 dB
0 dB
Final Output = –10 dB
Input (dB)
E = –6 dB
3:1 Above Threshold
Ratio for Compression
1:1 Below Threshold
Ratio for Compression
Figure A–2. DRCE Example With Threshold at –12 dB
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