Publication: Design and analysis of cmos rfic if lowpass filter 1.9ghz range for cdma applications
Date
2005-03-01
Authors
Loo, Kwang Tatt
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Abstract
In this century, the world’s is starting to bloom by the wireless communication. 3rd generation (3G) communication requirement is a must in the recent market demand and 4th generation (4G) is on its way. Portable wireless communication systems require many complex transceiver components. Many design techniques have been proposed for monolithic filters as they are key components of the transceiver systems. Since cost, reliability, performance, size and power consumption are main concerns of these components, they should ideally be realized as integrated circuits wherever possible. More challengingly, the whole system is implemented as of system on chip (SOC), which also known as radio frequency integrated circuit (RFIC). Due to high frequency, radio frequency (RF) filters are often discrete components rather than on chip. But, analog filter is preferred in the design of high-performance electronic circuits for the intermediate frequency (IF) stage with low cost and low power consumption for high-speed applications. At baseband, filters are mostly digital filter due to programmability. In general, filters can appear in three places:
1) RF stage : RF filters are mostly discrete components.
2) IF stage : IF filters are analog integrated components.
3) Baseband : Digital filters are typically applied.