2. Focus applications, products & technologies
2.1 Wireless communication infrastructure
2.1.1 uild a highly efficient signal chain with RF components for transmit line-ups and receive chains
B
As a global leader in RF technology and component design, NXP Semiconductors offers a complete
portfolio of RF products, from low- to high-power signal conditioning that delivers advanced performance
and helps simplify your design and the development process. Our solutions range from discrete devices to
modular building blocks, so you can design a highly efficient signal chain.
State-of-the-art QUBiC4
NXP’s industry-leading QUBiC4 technology, available since
2002, has been widely deployed in the field and offers
more consistent parameter performance compared to GaAs
technology. It speeds the migration from GaAs to silicon and
delivers more functionality in less space. High integration
reduces the design footprint and enables more cost-
competitive designs. It also improves reliability and offers
significant savings in manufacturing expenditures.
IQ-Modulator
JEDEC Interface
I
DVGA RF-BP
Dual
DAC
Q
IF-SAW
Application diagram of base station
(all cellular standards and frequencies)
The block diagram below shows base station transmit (upper
part, Tx) and receive (lower part, Rx) functions, and includes
the Tx feedback function (middle part, Tx feedback).
Power Amplifier
MPA
HPA
PLL
VCO
0
90
Transmitter
DVGA Mixer+LO
Att.
Tower -
Mounted
Amplifier
Tx
Duplexer
LNA +VGA
(JEDEC) Interface
Digital Baseband
OBSAI / CPRI
Digital
Front
End
DPD
CFR
DUC
DDC
JEDEC
IF
ADC
TX / RX1
LO
RF-SAW
JEDEC Interface
Rx
LNA
Filter Unit
µC
RX2
Dual
ADC
BP or LP
Dual
DVGA
IF-SAW
Dual
Mixer
PLL
VCO
LNA+VGA
Clock
Generator
Jitter Cleaner
Data Converter
RF Small Signal
RF Power
Micro Controller
Digital wideband VGAs with high linearity & flexible
current settings
These 6-bit digital VGAs (BGA7204 & BGA7210) offer high
linearity (35 dBm @ 2.2-2.8 GHz) and high output power
(23 dBm @ 2.2-2.8 GHz) across a large bandwidth without
external matching. Smart routing with no connection crosses
simplifies design and decreases footprint by 25%.
42
NXP Semiconductors RF Manual 16
th
edition
The unique power-save mode can effectively reduce the current
consumption in TDD systems up to 45%. The BGA7210 adds
flexible current distribution across its two amplifiers, depending
on the attenuation state, to save current.
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