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參數(shù)資料
| 型號(hào)： | CDB4270 |
| 廠商： | Cirrus Logic, Inc. |
| 元件分類： | Codec |
| 英文描述： | 24-Bit, 192 kHz Stereo Audio CODEC |
| 中文描述： | 24位192千赫立體聲音頻CODEC |
| 文件頁數(shù)： | 27/48頁 |
| 文件大?。?/td> | 730K |
| 代理商： | CDB4270 |
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DS686A1
27
CS4270
5.2.8 De-Emphasis
One de-emphasis mode is available via the Control Port and is optimized for 44.1 kHz sampling rate.
5.2.9 Oversampling Modes
The CS4270 operates in one of three oversampling modes based on the input sample rate. Mode selec-
tion is determined by the FM_&_M/S_Mode[1:0] bits in the Functional Mode register (03h). Single-Speed
mode supports input sample rates up to 54 kHz and uses a 128x oversampling ratio. Double-Speed mode
supports input sample rates up to 108 kHz and uses an oversampling ratio of 64x. Quad-Speed mode
supports input sample rates up to 216 kHz and uses an oversampling ratio of 32x. See
Table 10
for Con-
trol Port Mode settings.
5.3
De-Emphasis Filter
The CS4270 includes on-chip digital de-emphasis.
Figure 11
shows the de-emphasis curve for Fs equal
to 44.1 kHz. The frequency response of the de-emphasis curve will scale proportionally with changes in
sample rate, Fs. Please see
Section 5.1.7
for the desired de-emphasis control for Stand-Alone mode and
Section 5.2.8
for control port mode.
The de-emphasis feature is included to accommodate audio recordings that utilize 50/15
μ
s pre-emphasis
equalization as a means of noise reduction.
De-emphasis is only available in Single-Speed Mode.
Gain
dB
-10dB
0dB
Frequency
T2 = 15 μs
T1=50 μs
F1
F2
3.183 kHz
10.61 kHz
Figure 11. De-Emphasis Curve
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CDB4271 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd CS4271 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| CDB4272 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd CS4272 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| CDB4299 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd AC’97 CODEC w/SRC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| CDB42L50 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Low Voltage, Stereo CODEC with headphone Amp |
| CDB42L51 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd Low-volt CODEC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
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