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參數資料
| 型號： | TLV320DAC32IRHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, DAC WITH PROGRAMMABLE PLL, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 22/69頁 |
| 文件大小： | 1242K |
| 代理商： | TLV320DAC32IRHBT |
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LB1
LB2
RB1
RB2
www.ti.com........................................................................................................................................ SLAS506B – NOVEMBER 2006 – REVISED DECEMBER 2008
Figure 32. Structure of the Digital Effects Processing for Independent Channel Processing
The coefficients for this filter implement a variety of sound effects, with bass-boost or treble boost being the most
commonly used in portable audio applications. The default N and D coefficients in the part are given in Table 2
and implement a shelving filter with 0-dB gain from DC to approximately 150-Hz, at which point it rolls off to a
3-dB attenuation for higher frequency signals, thus giving a 3-dB boost to signals below 150-Hz. The N and D
coefficients are represented by 16-bit two's complement numbers with values ranging from -32768 to +32767.
Table 3. Default Digital Effects Processing Filter Coefficients,
When in Independent Channel Processing Configuration
Coefficients
N0 = N3
D1 = D4
N1 = N4
D2 = D5
N2 = N5
27619
32131
–27034
–31506
26461
The digital processing also includes capability to implement 3-D processing algorithms by providing means to
process the mono mix of the stereo input, and then combine this with the individual channel signals for stereo
output playback. The architecture of this processing mode, and the programmable filters available for use in the
system, is shown in Figure 33. Note that the programmable attenuation block provides a method of adjusting the
level of 3-D effect introduced into the final stereo output. This combined with the fully programmable biquad filters
in the system enables the user to fully optimize the audio effects for a particular system and provide extensive
differentiation from other systems using the same device.
Copyright 2006–2008, Texas Instruments Incorporated
29
Product Folder Link(s): TLV320DAC32
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