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Mitsubishi發表可交換的功率放大器模組(英文內容)
(技術新聞, 2006年10月16日)
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Mitsubishi Electric has developed an Ingap HBT1 switchable power amplifier for WCDMA used in mobile handset terminals. The amplifier module reportedly shows improved efficiency at low to mid power output, and also eliminates the need for external peripheral components, reducing the size of mobile handsets. Sample shipments will begin in February 2007.
The company explained that with the high function and multi-band/mode operations in cellular handsets in recent years, developers have been trying to reduce the size and increasing number of necessary components to keep terminals small. To secure talk time, typical WCDMA power amplifiers reportedly need an external DC/DC converter to lower operating voltage and improve efficiency at low and mid range output when operation repetitions are frequent.
Mitsubishi is understood to have developed a power amplifier module that does not need an external DC/DC converter by using 2 chain amplifiers that can switch to respond to different outputs, enabling efficiency during low and medium output. This is understood to secure talk time while reducing size of mobile handset terminals.
http://global.mitsubishielectric.com/news/news_releases/2006/mel0665.pdf
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