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6PAIC3104IRHBRQ1 数据表(PDF) 21 Page - Texas Instruments |
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6PAIC3104IRHBRQ1 数据表(HTML) 21 Page - Texas Instruments |
21 / 95 page LB1 LB2 RB1 RB2 B0154-01 1 2 1 2 1 2 1 2 N0 2 N1 z N2 z N3 2 N4 z N5 z 32,768 2 D1 z D2 z 32,768 2 D4 z D5 z - - - - - - - - æ ö æ ö + ´ ´ + ´ + ´ ´ + ´ ´ ç ÷ ç ÷ ç ÷ ç ÷ - ´ ´ - ´ - ´ ´ - ´ è ø è ø 21 TLV320AIC3104-Q1 www.ti.com SLAS715A – JUNE 2010 – REVISED MARCH 2016 Product Folder Links: TLV320AIC3104-Q1 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated In addition to the de-emphasis filter block, the DAC digital effects processing includes a fourth-order digital IIR filter with programmable coefficients (one set per channel). This filter is implemented as cascade of two biquad sections with frequency response given by: (3) The N and D coefficients are fully programmable, and the entire filter can be enabled or bypassed. The structure of the filtering when configured for independent channel processing is shown in Figure 12, with LB1 corresponding to the first left-channel biquad filter using coefficients N0, N1, N2, D1, and D2. LB2 similarly corresponds to the second left-channel biquad filter using coefficients N3, N4, N5, D4, and D5. The RB1 and RB2 filters refer to the first and second right-channel biquad filters, respectively. Figure 12. Structure of 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 3 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, 2s ‑complement numbers with values ranging from –32,768 to 32,767. 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 27,619 32,131 –27,034 –31,506 26,461 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, are shown in Figure 13. 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 optimize the audio effects for a particular system and provide extensive differentiation from other systems using the same device. |
类似零件编号 - 6PAIC3104IRHBRQ1 |
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类似说明 - 6PAIC3104IRHBRQ1 |
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