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WM8961GEFL/V bảng dữ liệu(PDF) 45 Page - Wolfson Microelectronics plc

tên linh kiện WM8961GEFL/V
Giải thích chi tiết về linh kiện  Ultra-Low Power Stereo CODEC with 1W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers
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WM8961GEFL/V bảng dữ liệu(HTML) 45 Page - Wolfson Microelectronics plc

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WM8961
Pre-Production
w
PP, August 2009, Rev 3.1
45
Figure 19 Recommended Headphone Output Configuration
HEADPHONE OUTPUT BIAS BOOST
In order to increase the signal to noise ratio (SNR) of the headphone output, the HP_PGAS_BIAS[2:0]
and HP_BIAS_BOOST[2:0] register bits can be used to increase the bias current to the headphone
output drive as shown in Table 31. There will be a slight increase in power consumption when a bias
boost greater than x1 is selected.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R68 (44h)
Analogue PGA
Bias
2:0
HP_PGAS_BIA
S[2:0]
011
Headphone PGA bias options
000
x 2
001
Reserved
010
Reserved
011
x 1
100-111 Reserved
R71 (47h)
Analogue HP 2
2:0
HP_BIAS_BOO
ST[2:0]
011
Boost bias into headphone driver
000:
x2
001:
Reserved
010:
Reserved
011:
x1
100-111 Reserved
Table 31 Headphone Output Bias Boost



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