LG KG800 - Microphone; Main Speaker

3.10 Microphone
The microphone is placed to the rear cover and contacted to top of Key PCB. The audio signal is
passed to AIN1P and AININ pins of AD6535. The voltage supply VMIC is output from AD6535, and is
a biased voltage for the AIN2P. The AIN2P and AIN2N signals are then A/D converted by the
voiceband ADC part of AD6535.The digitized speech (PCM 8KHz ,16KHz) is then passed to the DSP
section of AD6527B for processing (coding, interleaving etc).
3.11 Main Speaker
3. TECHNICAL BRIEF
- 47 -
47u
C201
R204
2.2K
VA205
EVLC18S02003
C212
39p
MIC201
SMA-568-0C-R2
1
2
2V5_VMIC
NA
C215
39p
39p
C202
C211
0.1u
C213
R201
1K
C214
NA
2.2K
R207
R206
100
VA204
EVLC18S02003
100
R205
VINNORP
VINNORN
Figure 3-28. Connection between Microphone and AD6535
E8
TXOUT
B7
SPOUT1L
SPOUT1R
J8
B8
SPOUT2L
H8
SPOUT2R
H6
EQ3R
EXTOUT
D7
EQ1R EQ2R
G6
3.3
R311
C311
47p 47p
C312
470p
C310
SPK_N
SPK_P