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MRF377HR3 Datasheet, PDF (9/16 Pages) Freescale Semiconductor, Inc – RF Power Field-Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs | |||
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TYPICAL DVBT OFDM BROADBAND CHARACTERISTICS
19
18
17 Gps
16
15
ηD
14
VDD = 32 Vdc, Pout = 45 W (Avg.), IDQ = 2000 mA
13
8K Mode DVBT OFDM
64 QAM Data Carrier Modulation
12
5 Symbols
11
10 ACPR
9
420 480 540 600 660 720 780 840
f, FREQUENCY (MHz)
Figure 9. Single - Channel DVBT OFDM
Broadband Performance
40
35
30
25
20
â40
â45
â50
â55
â60
â65
900
19
18.5
18
560 MHz
660 MHz
17.5
860 MHz
17
470 MHz
VDD = 32 Vdc, IDQ = 2000 mA
8K Mode OFDM
64 QAM Data Carrier Modulation
5 Symbols
760 MHz
16.5
16
2
4 6 8 10
30
50
Pout, OUTPUT POWER (WATTS) AVG.
Figure 10. Single - Channel DVBT OFDM Broadband
Performance Power Gain versus Output Power
30
VDD = 32 Vdc
25 IDQ = 2000 mA
8K Mode OFDM
64 QAM Data Carrier Modulation
20 5 Symbols
15
10
560 MHz
470 MHz
660 MHz
860 MHz
760 MHz
5
0
10
100
Pout, OUTPUT POWER (WATTS) AVG.
Figure 11. Single - Channel DVBT OFDM
Broadband Performance Drain Efficiency versus
Output Power
â56
â58
470 MHz
â60 660 MHz
860 MHz
â62
VDD = 32 Vdc
â64 IDQ = 2000 mA
8K Mode DVBT OFDM
â66
64 QAM
Data Carrier Modulation
5 Symbols
â68
10
760 MHz
560 MHz
â20
7.61 MHz
â30
â40
â50
â60
â70
â80
â90
4 kHz BW
â100
4 kHz BW
â110
100
â5 â4 â3 â2 â1 0 1 2 3 4 5
Pout, OUTPUT POWER (WATTS) AVG.
f, FREQUENCY (MHz)
Figure 12. Single - Channel DVBT OFDM Broadband Performance Figure 13. 8K Mode DVBT OFDM Spectrum
Adjacent Channel Power Ratio versus Output Power
RF Device Data
Freescale Semiconductor
MRF377HR3 MRF377HR5
9
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