U2790B_06 Datasheet, PDF (11/16 Pages) ATMEL Corporation – 1000-MHz Quadrature Modulator

U2790B
Figure 7-15. Typical useful LO Power Range versus LO Frequency at T_amb = 25° C
0
-10
-20
-30
-40
-50
0 200 400 600 800 1000 1200 1400
LO Frequency (MHz)
Figure 7-16. Application Circuit
Baseband
processing
A _inv
220n
8
A ^{220n BB}_{Ai 7}
BB_Ai
100p
12 Duty cycle
LO
10k ^LO_i
regenerator
V_S
Ph_adj ¹⁵
16
B
9
220n ^BBBi 10
BB_Bi
220n
B_inv
Frequency
doubler
0°
90°
90°/ control
loop
C_PU
PU
1n
S_PU
6
1
Power
down _{5,4 VS}
Power
down
V_S
100n
1n
Σ
OUT
3 _RFO
2,11,13,14
GND
11
4583D–CELL–07/06