參數(shù)資料
型號(hào): AK4561
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi): Codec
英文描述: 16bit CODEC with built-in ALC and MIC/HP-Amp
中文描述: 16位編解碼器在ALC和內(nèi)置麥克風(fēng)/惠普放大器
文件頁(yè)數(shù): 39/48頁(yè)
文件大小: 332K
代理商: AK4561
ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Rev. 0.9
2000/09
- 39 -
(3) Zero crossing timeout (ZTM1-0)
ATT level (LMAT1-0)
ATT level (LMAT1-0)
(3) Zero crossing timeout (ZTM1-0)
Limiter detection level (LMTH)
Limiter detection level (LMTH)
(1)
(1)
(2)
(2)
Recovery waiting counter reset level (LMTH)
Figure 27. In case of continuing the limiter operation (ZELM = “1”)
(1)
When the input level exceeds the ALC limiter detection level, the ALC limiter operation starts. Zero crossing counter
starts at the same time.
(2)
Zero crossing detection. When the input signal is detected, the IPGA value is attenuated until the value set by
LMAT1-0 and the ALC limiter operation is finished.
(3)
Zero crossing timeout is set by ZTM1-0 bits. But the first zero crossing timeout cycle after starting the limiter
operation may be the short cycle by the state of the last zero crossing counter. (For example, in case of doing the
limiter operation during the recovery operation)
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