TXRX VCC
10
BIAS
RXRF
50 Ω i/p
2.7 pF
8
LNAREF
7
TO MIXER
BIAS
3.3 pF
PCB GND
11
LNA STAGE
15
TXRX GND
EXTERNAL COMPONENTS
ARE FOR TYPICAL i/p SWR
OF 1.3:1 OVER 1.85
TO 2.55 GHz
Figure 24. Equivalent Circuit for RXRF Input.
TXRX VCC
10
RECOMMENDED DRIVE
LEVEL IS 300 mV pk-pk.
10 k
TXIF IN
TXIF 5
TXIFB 6
USE d.c. BLOCKING Cs TO
AVOID CHANGING d.c. BIAS
CONDITIONS. 22 pF MAX. FOR
QUICK TURN ON.
11/15
TXRX GND
10 k
TX i/p STAGE
Figure 25. Equivalent Circuit for TXIF Input.
LO
RF
VCC
3 RXIFB
6.8 pF
750
120 nH
8.2 pF
4 RXIF
50 Ω o/p
EXTERNAL COMPONENTS
SHOWN ARE FOR 110.592 MHz
I.F. AND TYPICAL 50 Ω o/p
SWR OF 1.3:1
11/15
TXRX GND
Figure 26. Equivalent Circuit for the RXIF Output and Recommended Matching
Circuit for 110.592 MHz IF.
7-99