User's Manual

68P80801E35-A 9/1/2001 17
EBTS System Manual - Vol 2 800/900/1500 MHz Base Radios
Power Amplifier
z
DC
FILTER
ADDRESS BUS
FROM BRC
SPI BUS
TO/FROM BRC
ADDRESS DECODE, MEMORY,
& A/D CONVERTER CIRCUITRY
MEMORY
BOARD SELECT
DECODE
CIRCUITRY
CHIP
SELECT
CHIP SELECT
DECODE
CIRCUITRY
CHIP SELECT
RF INPUT
RF OUT
TO ANTENNA
RF FEEDBACK
TO EXCITER
MODULE
EBTS611
051398LLN
CLK/DATA
A/D
CONVERTER
LINEAR DRIVER MODULE
CLASS AB
STAGE 2
CLASS AB
INTERCONNECT
BOARD
+28 VDC
PA TEMP SENSE
RF COMBINER/
PERIPHERAL MODULE
LOW-PASS
FILTER
REF PWR
FWD PWR
FAN SENSE
TEMPERATURE
SENSOR
CIRCULATOR
50 OHM
LOAD
50 OHM
LOAD
50 OHM
LOAD
FAN ASSEMBLY
RF
INTERCONNECT
BOARD
LINEAR FINAL
MODULES
RF SPLITTER/DC DISTRIBUTION BOARD
STAGE 3
CLASS AB
50 OHM
LOAD
50 OHM
LOAD
STAGE
1
Figure 5 TLF2020 (CLF1772) 40W- 800 MHz PA Functional Block Diagram
(Sheet 1 of 1)
40W- 800 MHz Power Amplifier – TLF2020 (LF1772)
Functional Block Diagram