參數(shù)資料
型號: AV2636
廠商: Electronic Theatre Controls, Inc.
英文描述: 24-bit 192kHz Stereo Audio DAC
中文描述: 24位192kHz立體聲音頻DAC
文件頁數(shù): 12/16頁
文件大?。?/td> 821K
代理商: AV2636
AV2636
Product Datasheet
DIGITAL FILTER CHARACTERISTICS
The digital interpolation filters have small passband ripples and large stopband attenuations. There are
three types of filters that are implemented for different sample mode (1X/2X/4X) and MCK relations. The
selection of the filters depends on the operation mode of the device, auto-detect mode or programmable
mode.
Programmable mode
: filter selection is shown in the following table. 20kHz audio passband is assumed.
Sample Mode
Parameter
Passband Ripple
Normal (1X)
Stopband Attenuation
Passband Ripple
Double (2X)
Stopband Attenuation
Passband Ripple
Quad (4X)
Stopband Attenuation
Auto-detect mode
: filter type is automatically selected based on the detected sample mode and MCK
relations.
The following plots show the digital filter response and closer look of the passband ripple for normal
speed mode (1X), double speed mode (2X) and quad speed (4X).
Condition
F < 0.45fs
F > 0.55fs
F < 0.225fs
F > 0.775fs
F < 0.1125fs
F > 0.8875fs
Min
60
60
53
Max
±0.03
±0.03
±0.03
Unit
dB
dB
dB
dB
dB
dB
AVS Technology, Inc.
www.avstech.com
12-16
August 18, 2004
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