Preliminary Information
SATURN
SATURN
CDMA/AMPS dual Band IF Receiver for Digital Phones
Preliminary Information
DS4721
Issue 4.2
April 1999
Features
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Selectable IF input buffers with characteristic
impedance suitable for interface to IF CDMA and
FM SAW filter outputs
AGC amplifiers with 90dB of variable gain, fully
compensated for temperature variation
IQ demodulator with accurately defined output DC
level and low DC offsets
LO operating at twice frequency with high accuracy
quadrature generation
Sophisticated power management control operation
Overload indicator
Odering Information
SATURN/KG/QP1S
SATURN/KG/QP1T
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Description
The SATURN circuit is designed for use in dual band dual
mode mobile phones (CDMA/AMPS). The circuit is
designed to be compataible with digital baseband and
mixed signal circuit chips from Mitel (Planet Chip-set)
and Qualcomm (MSM2 and BBA). A wideband AGC
amplifier allows the input of CDMA or AMPS signal paths
with a range power management control options.
q
q
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IF VCC
IF VEE
IF OUT
FM IFIN
I OUT
CDMA IFIN
Q OU T
AGC
Gain
Control
Temperature
Comp.
DLL
BAND 1900
Overload
Indicator
STARTUP
ENABLE
MODE CDM
PRESCALER
Mode
Control
VHF VCC
VHF VEE
Figure 1 Block diagram
OVERLOAD DET
VHF BUF
VHF RES
1
MITEL [ MITEL NETWORKS CORPORATION ]
