User's Manual

18 68P80801E35-A 9/1/2001
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
120497JNM
CLK/DATA
CIRCULATOR
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
STAGE
1
CLASS AB
STAGE 2
CLASS AB
RF SPLITTER/DC DISTRIBUTION BOARD
INTERCONNECT
BOARD
STAGE 3
CLASS AB
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
DC
FILTER
+28 VDC
Figure 6 TLN3335 (CLF11771) 70W- 800 MHz PA Functional Block
Diagram (Sheet 1 of 1)
70W- 800 MHz Power Amplifier – TLN3335 (CLF1771)
Functional Block Diagram