Nokia 6310i Service Manual page 98

NPL-1
3 - Audio System
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Parameter
Microphone amplifier gain for MIC 2 / Handsfree
Microphone amplifier gain for MIC 2 / Headset
Microphone amplifier input resistor
Differential input voltage range for MIC2 input,
G =20 dB
Differential input voltage range for MIC2 input,
G =0 dB
Receive Common mode input voltage range for
MIC input
Common mode voltage level
Differential mode voltage range for microphone
amplifier, gain 20 dB
Differential load resistance for the microphone
input stage
Transmit gain absolute accuracy
Transmit gain variation with programmed gain,
temperature and supply
Common mode rejection ratio
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Microphone input specifications, external audio
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PAMS Technical Documentation
Symbol Min Typ
MicG2 0
MicG2 22.5
R 30 50
MIC
V 200
IN2
V 2.0
IN2
V 100
INCMR
V 1.3 1.35
CM
V 2.0
OUT
R 30
GS
GXA -1.0
GXAGTV -0.7
CMRR 45 60
Max Unit
22,5 dB
42,5 dB
kOhm
m V
PP
V
PP
m V
PP
1.4 V
m V
PP
450 kOhm
0.0 dB
0.7 dB
dB
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