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In this paper, we proposed a wireless and miniature device for long-term surveillance for nasopharynx cancer. The device was composed with ⊘3.5mm diameter mini-camera, 2.4GHz wireless emitter and rechargeable 80mAh lithium-ion battery. The miniature camera was attached on the surface of the vomer bone. The captured image from the device was performed with sobel edge detection algorithm to extract...
With the miniaturization of electronic devices, small size but high capacity power supply system appears to be more and more important. A hybrid power source, which consists of a fuel cell (FC) and a rechargeable battery, has the advantages of long lifetime and good load following capabilities. In this paper, we propose the schematic of a hybrid power supply system, that can be integrated on a chip...
Battery current is a key parameter that decides the runtime of a portable electronic system. For low power applications like IEEE 802.15.4 and Zigbee wireless network, the average battery current drain approximates the sleep mode current drain, since significantly more time is spent in sleep than in active usage. This paper proposes substituting a DC-DC converter for a low drop-out (LDO) regulator...
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