SA900 Просмотр технического описания (PDF) - Philips Electronics
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SA900 Datasheet PDF : 20 Pages
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Philips Semiconductors
I/Q transmit modulator
Preliminary specification
SA900
Table 3. Power Control
Attenuation (dB)
PC0 (0.6dB)
0
0
0.6
1
1.3
0
1.9
1
2.5
0
3.2
1
3.8
0
4.4
1
5.0
0
5.7
1
6.3
0
•
•
•
23.3
1
•
•
•
39.7
1
PC1 (1.3dB)
0
0
1
1
0
0
1
1
0
0
1
0
1
PC2 (2.5dB)
0
0
0
0
1
1
1
1
0
0
0
1
1
PC3 (5.0dB)
0
0
0
0
0
0
0
0
1
1
1
PC4 (10.0dB)
0
0
0
0
0
0
0
0
0
0
0
PC5 (20.0dB)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Component
Designator
R1
R2
C1
C2
C3
RSET
PHSOUT
DUAL Mode
560Ω
1kΩ
2.2nF
No Load
33pF
15kΩ
Value
Typical Filter Network
R2
R1
C2
C3
C1
AMPS Mode
560Ω
5.6kΩ
2.7µF
.27µF
6.8nF
75kΩ
VCTRL
Figure 5. PLL Loop Filter
SR00640
TANK_1
TANK_2
C1
VCC
L1
C3
C2
(AMPS MODULATION)
fVCO [ 120MHz
C1 = C2 = 33pF
C3 = 12pF
1
VR1
VCTRL
+ 2p ǸL1CȀ
L1 = 82nH
VR1 TOKO KV1470
ǒ Ǔ CȀ + C3 ) 1 ) 1 ) 1 *1
C1 C2 CVRI
Figure 6. VCO Tank Configuration
SR00641
1997 Sept 16
12
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