參數(shù)資料
型號(hào)： LC07410LP
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, QCC40
封裝： 5 X 5 MM, VQLP-40
文件頁(yè)數(shù)： 9/35頁(yè)
文件大小： 430K
代理商： LC07410LP
LC07410LP
No.A1207-17/35
(2) Recovery operations
When the ADC “digital volume” output is less than 2dB of the ALC limiter level, ALC_VAL[1:0], and this status
continues for the recovery wait time, ALC_RWT[1:0], the PGA gain “digital volume value” is increased.
The rate of gain increase is performed using the recovery coefficients given below according to the amplitude.
Recovery coefficients by level
Output level
<THR1
THR1< <THR2
THR2< <VALC-2dB
FR
FR1
FR2
FR3
The increase in PGA gain “digital volume value” is carried out continuously while the ADC “digital volume” remains
less than 2dB of ALC_VAL[1:0]. The amount of increase in zero-cross to zero-cross PGA gain “digital volume
value” is at most 1dB.
Functions common to (1) and (2)
Zero cross detection
When [ALC_ZCD] is set to 0, the PGA gain “digital volume value” changes regardless of the zero cross timing of the
A/D converter “digital volume” output.
When [ALC_ZCD] is set to 1, the PGA gain “digital volume value” changes at the zero cross timing of the A/D
converter “digital volume” output.
Zero cross timeout
Even if the PGA “digital volume” output does not cross zero, as long as there is no zero cross signal during the zero-
cross timeout value, ALC_ZCDTM[1:0], a zero-cross signal is generated internally and the PGA gain “digital volume
value” is changed.
ALC Wave Forms
ALC_VAL
-2dB
a
input
gain
output
b
c
d
e f
gh
a: Attack (FA1)
b: Attack (FA2)
d: Recovery wait time (RWT)
e: Recovery (FR1) f: Recovery (FR2) g: Recovery (FR3)
c, h: Stable
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