학술논문

A quad band WCDMA transceiver with fractional local divider
Document Type
Conference
Source
2008 IEEE Symposium on VLSI Circuits VLSI Circuits, 2008 IEEE Symposium on. :96-97 Jun, 2008
Subject
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Radiofrequency integrated circuits
Transceivers
Voltage-controlled oscillators
Frequency synthesizers
Phase shifters
Frequency conversion
Multiaccess communication
multi-band
multi-mode
direct conversion
fractional divider
local synthesizer
phase shifter
Language
ISSN
2158-5601
2158-5636
Abstract
We developed a quad band (1, 6, 9, and 11) WCDMA transceiver with digital interface. The developed transceiver uses a 2/5 divider in the local part of the direct conversion architecture. Using the 2/5 divider, reduces the number of local synthesizers to only one in the architecture and avoid VCO pulling phenomena of the local synthesizer perfectly. This transceiver achieved 3% EVM and −46 dB ACLR, which is enough of a margin for standard specifications.