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| 型號(hào)： | TAS5705PAPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封裝： | 10 X 10 MM, GREEN, PLASTIC, HTQFP-64 |
| 文件頁(yè)數(shù)： | 36/72頁(yè) |
| 文件大小： | 1168K |
| 代理商： | TAS5705PAPR |
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M0012-02
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www.ti.com ................................................................................................................................................ SLOS549A – JUNE 2008 – REVISED SEPTEMBER 2009
The biquads are implemented in a direct form-I architecture. The direct form-I structure provides a separate delay
element and mixer (gain coefficient) for each node in the biquad filter.
The five 26-bit (3.23) coefficients for the biquad are programmable via the I2C interface.
The following steps are invovled in using a loudness biquad with the volume comprensation feature:
1. Program the biquad with a loudness filter.
2. Program 0x26 (1/G) and 0x28 (scale).
3. Enable volume compensation in register 0x0E.
Figure 47. Biquad Filter
Subchannel Preprocessing
A subchannel has three input multiplexers that can select from the bass management output, the downmix
output, or the channel-6 input multiplexer output.
Register 0x21, bits (9:8) determine the submultiplexer selection, defined in Table 4.
Table 4. Submultiplexer Selection
Bits
Submultiplexer
00
Pass through channel-6 input multiplexer output
01
Select bass management block output for submultiplexer
10
Select downmix ouput for submultiplexer
Copyright 2008–2009, Texas Instruments Incorporated
41
Product Folder Link(s): TAS5705
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