User's Manual

22 68P80801H45-1 1/20/2002
800/900/1500 MHz Base Radios EBTS System Manual - Vol 2
Power Amplifier
COMBINER
BOARD
LINEAR DRIVER MODULE
LINEAR FINAL
MODULES
50 OHM
LOAD
ADDRESS BUS
FROM BRC
SPI BUS
TO/FROM BRC
ADDRESS DECODE, MEMORY,
& A/D CONVERTER CIRCUITRY
MEMORY
A/D
CONVERTER
BOARD SELECT
DECODE
CIRCUITRY
PA TEMP SENSE
CHIP
SELECT
CHIP SELECT
DECODE
CIRCUITRY
CHIP SELECT
RF COMBINER/
PERIPHERAL MODULE
LOW-PASS
FILTER
RF INPUT
RF OUT
TO ANTENNA
RF FEEDBACK
TO EXCITER
MODULE
REF PWR
FWD PWR
FAN SENSE
FAN ASSEMBLY
TEMPERATURE
SENSOR
EBTS417_900
121701JNM
CLK/DATA
CIRCULATOR
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
STAGE 2
CLASS AB
RF SPLITTER/DC
DISTRIBUTION BOARD
INTERCONNECT
BOARD
STAGE 3
CLASS AB
DC
FILTER
+28 VDC
CIRCULATOR
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
EEPOT
STAGE 2
CLASS AB
DISTRIBUTED
STAGE 1
CLASS AB
DISTRIBUTED
C_E
INC
V_D
VVA
PA_ENABLE (PA_E)
PA_E PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
PA_E
Figure 11 900 MHz QUAD Channel BR PA Functional Block Diagram
(Sheet 1 of 1)
900 MHz QUAD Power Amplifier – DLN1202 (CTF1082)
Functional Block Diagram