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EECS 522 | Analog Integrated CircuitsHome | Lecture Notes | Problem Sets | CAD Assignments | Projects |
A Low Power Integrated UWB Transmitter with Solar Energy Harvesting for Wireless Image Sensor NetworksAbstract Wireless image sensor networks (ISN) can be applied for various applications such as surveillance, monitoring and security. An integrated imager provides digital image signals (> 8-b) of entire pixel array (normally > 1 Mpixels), which entails high bandwidth and large power consumption for wireless data transmission. In the wireless ISN, the UWB transmitter which generates short pulses at discrete time interval instead of continuous sinusoidal signals is one way to reduce the power consumption. Moreover, in order to enhance the lifetime of the sensor node, additional power harvesting to the integrated battery is essential. In this work, we propose an integrated UWB transmitter with solar energy harvesting applicable to the wireless ISN. The integrated voltage regulator which regulates the voltage from solar cell arrays provides the power supply to the pulse-based UWB transmitter. The baseband data rate is 40Mbps (for 15 fps, 8-b VGA imager) and the target power consumption is < 1mW. Files |
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