PM6650 Qualcomm, Inc., PM6650 Datasheet - Page 4

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PM6650

Manufacturer Part Number
PM6650
Description
MSM6150 CHIPSET SOLUTION
Manufacturer
Qualcomm, Inc.
Datasheet

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4
Q U A L C O M M
RFT6100 Device Description
for the PCS band. The baseband I/Q input from the MSM directly
modulates the cellular or PCS carrier derived from the respective LO
generation circuit.
Both the cellular and PCS output drive their own VGA with a gain
control range of 85 dB. A final cellular driver amplifier provides a
modulated RF output.
To accommodate split-band and filtering, the PCS VGA drives two
output amplifiers that can be selected independently or
simultaneously via an input selectable switch. All RF outputs have
fully integrated 50-ohm matching networks. Integrated on the
RFT6100 is the receiver phase locked loop (PLL), the transmit
PLL and the entire transmit VCO including resonant components.
The VCO drives the LO generation block, which in turn generates
the required local-oscillator signal for all CDMA bands of
operation.
MSM6150
C D M A
T E C H N O L O G I E S
The RFT6100 device is a direct conversion
chipset that integrates all the upconversion and
modulation functionality necessary for
CDMA-mode phones operating in cellular and
PCS bands. This transmit chip consists of two
sets of I/Q modulators, one for cellular and one
CHIPSET SOLUTION
H T T P : / / W W W. C D M AT E C H . C O M
E N A B L I N G T H E F U T U R E O F C O M M U N I C A T I O N S
RFT6100 Device Features
• Reduction in component count, space and cost via radioOne
• Single- or dual-band operation: cellular and PCS
• Single- or multimode operation:
• Full direct upconversion from analog baseband to RF
• Transmit signal path:
• Integration of LO generation circuit
• Requirement of only one external VCO for all CDMA bands of operation
• Entire transmit synthesizer on chip (transmitter PLL and VCO)
• Receiver PLL on chip
• Greater than 85 dB transmit power control range
• Power-reduction feature via MSM control extends handset talk time
• Efficient three-line QCT SBI
• Power supply voltage (2.7 to 3.0 V)
• Small thermally efficient package (40-pin BCC++)
chipset that eliminates receiver and transmitter IF
– Cellular CDMA
– PCS CDMA
– Baseband amplifier
– Two sets of quadrature modulators/upconverters
– RF AGC amplifier, switch network, driver amplifier
– Optimized for low DC power consumption versus RF output level
– Transmit puncturing
– Selective circuit power-down
T M

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