Sharp GX20 Service Manual - Page 156

Ic831 Vhipf08123b-1l Pf08123b: Rf Power Amp., Ic881 Vhihd155173-1l Hd155173: Auto Power Control, Pin

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GX20 CONFIDENTIAL IC831 VHIPF08123B-1L (PF08123B): RF POWER AMP. Pin No. 1 2 3 4 5 6 7 8 9 Terminal name Pin GSM Vapc Vdd1 Pout GSM Pout DCS Vdd2 Vctl Pin DCS GND Input/Output Input Input - Output Output - Input Input - Description of terminal Input power from TXVCO (GSM) Power control voltage from APCIC Power supply Output power (GSM) Output power (DCS/PCS) Power supply Band select switch Input power from TXVCO (DCS/PCS) Ground Vctl Vdd2 7 6 Pin DCS 8 5 Pout DCS Pin GSM 1 4 Pout GSM 2 Vapc Bias circuit 3 Vdd1 IC881 VHIHD155173-1L (HD155173): AUTO POWER CONTROL Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Terminal name VAPC1 IN1(-) IN(+) VCC1 DACin AMPIB AMPO Mode SW VCC2 PS GND2 RFin1 RFin2 GND1 IN2(-) VAPC2 Input/Output Output Input Input Input Input Input Output Input Input Input - Input Input - Input Output Description of terminal APC voltage output terminal (GSM900) Output amp negative terminal (GSM900) Output amp positive terminal Power supply DAC voltage input terminal DAC amp input terminal DAC amp output terminal Mode switch Power supply Power save switch Ground GSM900 signal input terminal DCS/PCS signal input terminal Ground Output amp negative terminal (DCS/PCS) APC voltage output terminal (DCS/PCS) 6 - 24

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GX20
6 – 24
CONFIDENTIAL
IC831 VHIPF08123B-1L (PF08123B): RF POWER AMP.
IC881 VHIHD155173-1L (HD155173): AUTO POWER CONTROL
Pin No.
Terminal name
Input/Output
Description of terminal
1
Pin GSM
Input
Input power from TXVCO (GSM)
2
Vapc
Input
Power control voltage from APCIC
3
Vdd1
–
Power supply
4
Pout GSM
Output
Output power (GSM)
5
Pout DCS
Output
Output power (DCS/PCS)
6
Vdd2
–
Power supply
7
Vctl
Input
Band select switch
8
Pin DCS
Input
Input power from TXVCO (DCS/PCS)
9
GND
–
Ground
Pin No.
Terminal name
Input/Output
Description of terminal
1
VAPC1
Output
APC voltage output terminal (GSM900)
2
IN1(-)
Input
Output amp negative terminal (GSM900)
3
IN(+)
Input
Output amp positive terminal
4
VCC1
Input
Power supply
5
DACin
Input
DAC voltage input terminal
6
AMPIB
Input
DAC amp input terminal
7
AMPO
Output
DAC amp output terminal
8
Mode SW
Input
Mode switch
9
VCC2
Input
Power supply
10
PS
Input
Power save switch
11
GND2
–
Ground
12
RFin1
Input
GSM900 signal input terminal
13
RFin2
Input
DCS/PCS signal input terminal
14
GND1
–
Ground
15
IN2(-)
Input
Output amp negative terminal (DCS/PCS)
16
VAPC2
Output
APC voltage output terminal (DCS/PCS)
Pin DCS
Pin GSM
Pout GSM
Pout DCS
Bias circuit
Vctl
Vdd1
Vdd2
Vapc
7
8
1
6
5
4
2
3