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參數(shù)資料
| 型號： | AK4365VN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | DAC with built-in PLL & HP-AMP |
| 中文描述： | DAC，帶有內置的鎖相環(huán) |
| 文件頁數(shù)： | 25/38頁 |
| 文件大?。?/td> | 410K |
| 代理商： | AK4365VN |
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ASAHI KASEI
[AK4365]
MS0110-E-01
2003/10
- 25 -
n
Soft Mute
Soft mute operation is performed in the digital domain. When LRMUTE or MMUTE bit go to “1”, the output signal is
attenuated by -
∞
(“0”) via the cycle set by TM1-0 bit (Table 12). When LRMUTE or MMUTE bit is returned to “0”, the
mute is cancelled and the output attenuation gradually changes to 0dB via the cycle set of TM1-0 bits. LRMUTE and
MMUTE bits operate independently. If the soft mute is cancelled within the cycle set by TM1-0 bits after starting the
operation, the attenuation is discontinued and returned to 0dB. The soft mute is effective for changing the signal source
without stopping the signal transmission.
LRMUTE bit
or
MMUTE bit
TM1-0 bit
(1)
Attenuation
0dB
-
∞
Analog Output
GD
(2)
GD
(3)
TM1-0 bit
Figure 14. Soft Mute Function
NOTE:
(1) The output signal is attenuated until -
∞
(“0”) by the cycle set by TM1-0 bit
(2) Analog output corresponding to digital input have the group delay (GD).
(3) If the soft mute is cancelled within the cycle of setting TM1-0 bit, the attenuation is discontinued and returned to
0dB(the setting value).
n
De-emphasis Filter
The AK4365 includes a digital de-emphasis filter (tc = 50/15
μ
s) by IIR filter corresponding to three sampling frequencies
(32kHz, 44.1kHz and 48kHz). The de-emphasis filter is enabled by setting FS2-0 and DEM bits.
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