参数资料
型号: WLA49VVA
厂商: National Semiconductor Corporation
元件分类: ADC
英文描述: Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
中文描述: 音频子系统的双模单声道立体声耳机和扬声器放大器的高效率和多功能模数转换器
文件页数: 42/112页
文件大小: 5017K
代理商: WLA49VVA
12.0 Status & Control Registers (Continued)
12.14 AGC_3 CONFIGURATION REGISTER
This register is used to control the LM4935’s Automatic Gain Control. (Note 18)
TABLE 15. AGC_3 (0x0Ah)
Bits
Field
Description
4:0
AGC_HOLDTIME
Programs the amount of delay before the AGC algorithm begins to adjust the gain of the
microphone preamplifier.
AGC_HOLDTIME
No. of speech segments
00000
2
0
00001
2
1
00010
2
00011
2
3
00100
2 to 111002
4to28
11101
2
29
11110
2
30
11111
2
31
7:5
AGC_ATTACK
Programs the speed at which the AGC will reduce gains if it detects the input level is too large.
AGC_ATTACK
Step Time (ms)
000
2
32
001
2
64
010
2
128
011
2
256
100
2
512
101
2
1024
110
2
2048
111
2
4096
Note 18: See the AGC overview.
LM4935
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