Qifan Gu

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We report on the successful development of a highly integrated dual-band receiver IC for CDMA-2000 mobile handset applications. The IC was implemented in an advanced SiGe BiCMOS process. It contained all receiver functions including low-noise amplifier, Demodulator, analog baseband filter, variable-gain amplifier, and frequency synthesizer. The receiver(More)
Sometimes, the traditional refrigeration system should operate even in cold seasons to control the temperature in data centers, control units of power stations. There are problems about operation economy and operating stability. The combination of refrigeration systems with heat pipes could provide a solution to weaken the problems. In this paper, a(More)
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