Design of RF Front-End Circuitsfor DVB-H Receivers
Date Issued
2006
Date
2006
Author(s)
Wang, Hung-Hsu
DOI
en-US
Abstract
In the recent years, chipsets for DVB-T receivers have become hot products in the industry. According to the requirement on the market, products developed for DVB-H receivers in mobile handsets will be the next research topic. Since batteries are the main power sources of mobile handsets, the power consumption of the products is of primary concern. To achieve this goal, we develop a low-power RF front-end for DVB-H receivers in mobile handsets. The front-end consists of a variable-gain low-noise amplifier, a mixer, and a basedband variable-gain amplifier.
First, we introduce the basic knowledge of RF fundamentals and some frequently used receiver architectures. The direct conversion architecture is chosen and the performance requirements of the constituent blocks are decided.
A variable-gain low-noise amplifier incorporating Gm-boosting and noise-canceling techniques is designed to operate at low power consumption. Monolithic inductor is not required and the area can be greatly saved.
A low power mixer and a basedband variable gain amplifier are designed for frequency downconversion and gain-adjustment, respectively. The gain can be varied linear-in-dB by using a quasi-exponential control method. The RF front-end is implemented in a 0.18μm CMOS technology and consumes less than 40mW from a 1.8V supply.
Subjects
手提式數位電視
射頻前端電路設計
DVB-H
RF front-end
Type
thesis
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