acpm-7891 Avago Technologies, acpm-7891 Datasheet - Page 14

• Manufacturer Part Number: acpm-7891
• Description: Agilent Acpm-7891 Tri-band Power Amplifier Module Egsm, Dcs And Pcs Multi-slot Gprs -
• Manufacturer: Avago Technologies

14
Option A
ACPM-7891 Test Board
Figure 3 shows the schematic for
the ACPM-7891 Test Board
which provides a straightfor-
ward method of testing and
evaluating the ACPM-7891.
External RF sources, power and
Vapc supplies are used.
Option B
Power Control Loop Design
The implementation of a trans-
mitter power control is one of the
most engineering-intensive and
time-consuming aspects of GSM
handset design. It dictates the
correct transmit power level and
burst shaping in a GSM network.
The use of an off-the-shelf power
control IC helps simplify the
engineering effort and shorten
the design cycle time.
The ACPM-7891 PA Control
Board includes the ACPM-7891
PA, Linear Technology
LTC1758-2 power control IC,
EGSM/DCS/PCS directional cou-
plers, tri-band diplexer and a
20-pin interface socket designed
to work with an LTC1758 demo
board from Linear Technology.
DCS/PCS Vapc
Figure 3. Schematic of ACPM-7891 Test Board.
Component
Label
C2
C3
C4
C5
C7
C8
C9
C11
C13
C14
DCS/PCS RFin
EGSM Vapc
EGSM RFin
C4
C3
23
26
21
18
16
2
1, 3, 5, 6, 8, 9, 10, 12, 13, 15, 17, 19, 22, 25
Component
Value
.033 µF
12 pF
220 pF
.033 µF
220 pF
33 pF
.033 µF
33 pF
.033 µF
27 pF
24
20
14
4
11
7
C7
C14
C11
C8
C5
C2
C9
C13
EGSM RFout
Vdd
Gnd
DCS/PCS RFout