- 您现在的位置：买卖IC网 > PDF目录98158 > TAS3004PFB (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PQFP48 PDF资料下载
参数资料
| 型号： | TAS3004PFB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封装： | GREEN, PLASTIC, TQFP-48 |
| 文件页数： | 32/84页 |
| 文件大小： | 671K |
| 代理商： | TAS3004PFB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页当前第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页
5–1
5 Filter Processor
5.1
Biquad Block
The biquad block consists of seven digital biquad filters per channel organized in a cascade structure, as shown in
Figure 5–1. Each of these biquad filters has five downloadable 24-bit (4.20) coefficients. Each stereo channel has
independent coefficients.
Biquad 2 ...
Biquad 1
Biquad N
Figure 5–1. Biquad Cascade Configuration
5.1.1
Filter Coefficients
The filter coefficients for the TAS3004 device are downloaded through the I2C port and loaded into the biquad memory
space. Each biquad filter memory space has an independent address. Digital audio data coming into the device is
processed by the biquad block and then converted into analog waveforms by the DAC. Alternately, filters can be
loaded by asserting terminals on the GPI port.
5.1.2
Biquad Structure
The biquad structure that is used for the parametric equalization filters is as follows:
H(z)
+
b
0 )
b
1
z*1
) b
2
z*2
a
0 )
a
1
z*1
) a
2
z*2
NOTE: a0 is fixed at value 1 and is not downloadable.
The coefficients for these filters are represented in 4.20 format—4 bits for the integer part and 20 bits for the fractional
part. In order to transmit them over I2C, it is necessary to separate each coefficient into three bytes. The upper 4 bits
of byte 2 is the integer part, and the second nibble of byte 2, byte 1, and byte 0 are the fractional parts.
The filters can be designed using the automatic loudspeaker equalization program (ALE) or a script running under
MatLab named Filtermaker. Both of these tools are available from Texas Instruments.
(1)
相关PDF资料 |
PDF描述 |
|---|---|
| TAS3004PFBR | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TAS3004PFBG4 | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TAS3004PFBRG4 | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TAS3103DBT | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| TAS3103IDBT | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS3004PFBG4 | 功能描述:音频 DSP Digital Audio Processor w/ Codec RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3004PFBR | 功能描述:音频 DSP Digital Audio Processor w/ Codec RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3004PFBRG4 | 功能描述:音频 DSP Digital Audio Processor w/ Codec RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3103 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Digital Audio Processor With 3D Effects |
| TAS3103A | 制造商:TI 制造商全称:Texas Instruments 功能描述:Digital Audio Processor With 3D Effects |
发布紧急采购，3分钟左右您将得到回复。