參數(shù)資料
型號(hào): ISD5216SERIES
英文描述: Single-Chip Voice Record/Playback Device
中文描述: 單芯片語(yǔ)音記錄/播放設(shè)備
文件頁(yè)數(shù): 37/83頁(yè)
文件大小: 758K
代理商: ISD5216SERIES
I5216 SERIES
Advanced Information
PRELIMINARY
Publication Release Date: November 30, 2001
- 37
Revision A1
AUTO MUTE AND AUTO GAIN FUNCTIONS
During playback, the signal passes through the Automatic Attenuator before it is filtered. The
Automatic Attenuator will attenuate all signals at the noise level in order to reduce the noise during
quiet pauses.
During record, low level input signals are brought up by the Auto Gain function if the configuration bit
D7 of CFG0 (AMT0) is set. This improves the signal to noise ratio of recorded low level input signals. If
the configuration bit CFG0<7> (AMT0) is set to ZERO, all input levels are recorded with the same gain
setting. The attack and release time of the Auto Gain and Auto Mute functions is set by the capacitor
on the ACAP pin. The AGC cannot be used if the Auto Gain or Auto Mute function is enabled.
Tattack
0,1504 x Vpeak
Trelease
6.58 x Vpeak
@ Cattcap=4.7
μ
F
Vpp
(dB)
0
0
-12
Vpp
(dB)
0
0
12
Expand
Compress
Gain
Gain
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