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CDPD

US standard for data communication via AMPS cellular infrastructure

 

  lna mixer if  
  LNA Down Converter IF  
  switch pll baseband  
  Duplexer PLL Baseband  
  pa driver mod  
  Power Amp Driver Modulator  
  Required Functions & Agilent Technologies products  

Agilent Technologies supplies:
solid state RF components for the data terminal


CDPD Rx-LNA top

Detects and amplifiers incoming signal
[US standard for data communication via AMPS cellular infrastructure]

3V:
AT-415, AT-320, AT-310, AT-305, HBFP-0405, HBFP-0420
INA-12063

5V:
INA-51063, MSA-2111


CDPD Rx-Down Converter top

Converts output of LNA to IF frequency
[900 MHz to 100 MHz conversion, <6 volt operation]

3V:
AT-415, AT-320, AT-310, AT-305 transistors as active mixer
IAM-91563 IC mixers
HSMS-820x Schottky diodes

5V:
IAM-81008 IC mixers


CDPD Rx-IF top

Low frequency amplification
[~70-100 MHz; <6 volt operation]

3V:
INA-30311, INA-32063

5V:
INA-51063, MSA-0611 and other MSA and INA gain blocks


CDPD T/R Switch top

provides isolation between transmit and receive paths
[900 MHz]

FDD system that uses a duplexer, not a switch.
No Agilent Technologies products


CDPD PLL top

Provides stable carrier for frequency conversion and/or modulator
[TBD, <6 volt operation]

oscillator : AT-415, AT-320, AT-310, AT-305

buffer : AT-415, AT-320, AT-310, AT-305,
INA-31063 or other MGA, INA, and MSA series gain blocks

prescalers: no Agilent Technologies products

phase comparator: no Agilent Technologies products


CDPD Baseband top

provides data inputs to modulator, converts output of IF into information

no Agilent Technologies products


CDPD Tx-Power Amplifier top

amplifies outgoing signal for broadcast, sets to correct power level
[900 MHz, 0.6 W Pout @ antenna, <6 volt operation]

3-6V:
AT-380, AT-33225 transistors

HSMS-28xx detector diodes for power control


CDPD Tx-Driver top

"glue" part that amplifies modulator output sufficiently to drive power chain
[900 MHz, 0 to 10 dBm Pout, <6 volt operation]

3V:
AT-320, AT-420, and AT-415 transistors
ATF-34143, ATF-10xxx, ATF-21186 FETs
MGA-81563, INA-34063

5V:
MSA-0611, MSA-2111


CDPD Tx-Modulator top

combines data with carrier
[vector modulator or modulated VCO depending on architecture]

[FM modulated VCO] AT-415, AT-320, AT-310, AT-305 as VCO

3V:
[Vector modulator design]
HPMX-2007
HPMX-2006 as upconverter

5V:
HPMX-2003


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this page last updated: 1 October 1999