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PDF AN11062 Data sheet ( Hoja de datos )
| Número de pieza | AN11062 | |
| Descripción | Broadband DVB-T UHF power amplifier | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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AN11062
Broadband DVB-T UHF power amplifier with the BLF888A
Rev. 1 — 30 May 2011
Application note
Document information
Info Content
Keywords
BLF888A, DVB-T, UHF broadcast
Abstract
This application note describes the design and performance of a DVB-T
UHF power amplifier using the BLF888A.
1 page  
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+VG1
R7
R5
C36
R3 C34
50 Ω C33 L33
R4
C37
C35
R6
L32
B2
R8
+VG2
L31
C32
L30
C31 C30
C19
C17
L5
R1
L1
C1 C3
C5
C11
L2
C8
C2 C4
C6 C7
C9
C12
C18 R2
C20
+VD1
C21
C13
L3
C15
L4 C10 50 Ω
B1
C14 C16
C22
+VD2
019aac329
Fig 2. Class-AB common-source broadband amplifier
5 Page 
NXP Semiconductors
AN11062
Broadband DVB-T UHF power amplifier with the BLF888A
9
(dB)
8
7
019aac336 42
ηD
(%)
38
(1)
(2)
(3)
34
6
5
400 500 600
(1) CCDF_50
(4) Deff_46
(2) CCDF_48
(5) Deff_48
a. CCDF 0.01 % + drain efficiency
-18
(dB)
-22
(4)
(5)
(6)
700
30
26
800 900
f (MHz)
(3) CCDF_46
(6) Deff_50
019aac337
25
(dB)
23
-26 21
(1)
(2)
(3)
-30 19
-34 (4) 17
(5)
(6)
-38 15
400 500 600 700 800 900
f (MHz)
(1) Gain_50
(4) Shoulder_46
(2) Gain_48
(5) Shoulder_48
(3) Gain_46
(6) Shoulder_50
b. Gain + shoulder distance (4.3 MHz from fc)
Shoulder measured in dBc via a delta marker
Fig 9. BLF888A large signal measurement: VDS = 46 V to 50 V, IDq = 1.3 A, Twater = 20 C
(water-cooled copper heatsink)
AN11062
Application note
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 May 2011
© NXP B.V. 2011. All rights reserved.
11 of 20
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| Páginas | Total 20 Páginas | |
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