Base stations transmit/receive communications from a variety of devices such as cell phones, paging services, and other wireless transmission systems. As the demands of next-generation telecommunications increase, base station solutions will need to support more complex processing, modulation, higher data rates, and new air interface schemes. National Semiconductor has leveraged its analog expertise to meet these demands by providing industry-leading products in all 3 base station functional blocks: receiver, baseband, and transmitter.
1 Sector Transmitter
A base station is generally made up of a high power amplifier (HPA), low noise amplifier (LNA), modem, multiplexor, and up- and down- converters. For receiving digital data, the LNA boost the signals to the down-converter, which lowers the frequency and sends it to the modem. The modem demodulates the carrier, and the digital output goes to the demultiplexing device and then to its destinations.
Component Highlights
*DVGA - increases system dynamic range by providing automatic gain control.
*High resolution ADC - designed for speed and single-supply operation with sample-and-hold circuits.
*LDOs, Buck switching regulators - specifically designed for noise-critical, battery-powered applications such as base stations.
*Ethernet PHY - small size, low power, fully interoperable Ethernet PHY delivers up to 1 Gbps performance.
*LVDS - SerDes and PHY products for reliable high speed data and clock distribution.
(1) PA Loop Control
LMV225TL
LMV225TLX
LMV226TL
(2) ADC
CLC5957MTD
CLC5957MTDX
(3) DAC
DAC081S101CIMK
DAC081S101CIMKX
DAC081S101CIMM
(4) SerDes
DS90CR215
DS90CR216A
DS90CR217
(5) Signal Conditioning
EQ50EVK
EQ50F100LR
LMV116
LMV118
LMV721
(7) PLL + VCO
LMX2310USLDX
LMX2311USLDX
LMX2312USLDX
(8) PLL + VCO
LMX2531LQ1570E
LMX2531LQX1570E
LMX2531LQ1650E
(9) Power
LM25005
LM25007
LM25010
(10) Temp Sensor
LM32
LM63
LM70
(11) LVDS Clock
Other Products:Serial Digital Interface (SDI)/SDV
Buffers/PHYs Single-Ended/Differential:Transceivers
Buffers/PHYs Single-Ended/Differential:Transceivers
(12) System Test Access
SCANSTA101SM
SCANSTA101SMX
SCANSTA111MT
(13) Ethernet
DP83865DVH
2 Baseband Board
The baseband board functionality of a Wireless Base Station Transceiver includes: 1) Separating received signals into channels by combining correct time slots or coded messages. 2) Sending these signals to the Base Station Controller for compression. 3) Changing to another channel when directed by the BSC. 4) Converting channels back into analog, combining multiple voice channels, up-converting to IF, filtering, and amplifying signals for transmission to mobile subscribers.
Component Highlights
*Buck switching regulators - provide high-efficiency, high- power density power conversion.
*Ethernet PHY - small size, low power, fully interoperable Ethernet PHY delivers up to 1 Gbps performance.
*Select from several hardware monitors, RDTS 2-wire serial temperature sensors and SPI/Microwire compatible digital sensors.
*LVDS - SerDes and PHY products for reliable high speed data and clock distribution.
(1) HW Monitor
LM40CIMT
LM40CIMTX
LM41CIMT
(2) RDTS
LM95231CIMMX-2
LM95231CIMMX-1
LM95231CIMMX
(3) Digital Temp Sensor
LM84BIMQAX
LM84BIMQA
LM70CIMMX-5
(4) Voltage Regulator
LM2651
LM2653
LM2655
(5) System Test Access
SCANSTA476TSD
SCANSTA112VSX
SCANSTA112VS
(6) Ethernet
DP83847ALQA56AX
DP83847ALQA56A
DP83848TSQ
3 ATM Switch
(1) Ethernet Port
DP83865DVH
(2) Voltage Regulator
LM2651
LM2653
LM2655
(3) System Test Access
SCANSTA476TSD
SCANSTA112VSX
SCANSTA112VS
(4) Ethernet
DP83847ALQA56AX
DP83847ALQA56A
DP83848TSQ
4 Sector Receiver
A base station is generally made up of a high power amplifier (HPA), low noise amplifier (LNA), modem, multiplexor, and up- and down- converters. For receiving digital data, the LNA boost the signals to the down-converter, which lowers the frequency and sends it to the modem. The modem demodulates the carrier, and the digital output goes to the demultiplexing device and then to its destinations.
Component Highlights
*DVGA - increases system dynamic range by providing automatic gain control.
*High resolution ADC - designed for speed and single-supply operation with sample-and-hold circuits.
*LDOs, Buck switching regulators - specifically designed for noise-critical, battery-powered applications such as base stations.
*Ethernet PHY - small size, low power, fully interoperable Ethernet PHY delivers up to 1 Gbps performance.
*LVDS - SerDes and PHY products for reliable high speed data and clock distribution.
(1) LNA
LMH6559
LMH6609
LMH6622
(2) DVGA
CLC5526MSA
CLC5526MSAX
LMH6502MA
(3) ADC
ADC11DL066CIVS
ADC11L066CIVY
ADC11L066CIVYX
(4) DDC
CLC5903SM
CLC5903VLA
(5) SerDes
DS92LV1021A
DS92LV1023E
DS92LV1260
(6) Signal- Conditioning
EQ50EVK
EQ50F100LR
(7) PLL + VCO
LMX2531LQ1570E
LMX2531LQX1570E
LMX2531LQ1650E
(8) Power
LM1572
LM25005
LM25007
(9) Temp Sensor
LM32
LM40
LM41
(10) LVDS Clock
Other Products:Serial Digital Interface (SDI)/SDV
Buffers/PHYs Single-Ended/Differential:Transceivers
Buffers/PHYs Single-Ended/Differential:Transceivers
(11) System Test Access
SCANSTA101SM
SCANSTA101SMX
SCANSTA111MT
(12) Ethernet
DP83816AVNG |
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