NXP Semiconductors
UM10772
How to use BFU5xx starter-kit
UM10772
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© NXP B.V. 2014. All rights reserved.
User manual
Rev. 1 — 21 January 2014
8 of 29
3.2 Basic schematic for Emitter Degeneration version (VED0x)
Fig 4.
Schematic Amplifier design VED
Remarks:
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Not all components are required, depends on amplifier/matching configuration
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Input and output considered to be 50 Ohms characteristic impedance (SMA type)
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Two parallel components from emitter to GND enable to split DC/AC
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Generic PI or T matching network at input and output possible
Basically on all BFU5xx series amplifier EVB’s this schematic is applied, small variations on
implementation are possible
Zin2
TR1
Zin1
Zin5
Zin3
Zin6
RF input
Zc1
Zc2
C4
C5
Zc3
Zbias2
Zbias1
Zfb2
Zfb1
Zout1
Zout4
Zout2
Zout5
Zout3
Celectr
RF output
Zin4
Zbias3
C7
C3
C2
C1
C6
Zfb3
Ze1
Ze2
