| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2013: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Outline of Final Research Achievements |
We have developed RF circuit technologies for multi-band / multi-mode direct digital RF transceiver. For transmitter, we proposed direct digital RF modulator which consists of current mode DAC and broad-band (multi-band) LO circuits (90degree divider and LO switches). By selecting number of active bit and clock frequency (over sampling number) of the DAC, multi-mode characteristic can be achieved. For receiver, we proposed direct RF undersampling receiver which consists of high speed ON/OFF LNA and high frequency BPF type S/H IC’s. By using these circuits, both high dynamic range and low power consumption can be obtained.
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