At present, autonomous wireless sensor network (WSN) components are extensively powered up using batteries. Due to limitations in batteries, it incurs huge maintenance cost and for remote and inaccessible areas battery replacement is simply impossible. To overcome this issue, an integrated Energy Harvester (EH) is proposed and developed here. Solar based EH has been identified as the most viable source of energy to be harvested for WSN components. Moreover, a novel chemical based EH is reported as the potential secondary source for harvesting energy because of its uninterrupted availability....

Novel phase accumulator design based on fast adder families such as a modified Brent-Kung adder, carry look-ahead adder and kogge-Stone adder, combined with the pipelining technique to achieve high-frequency resolution and high-speed throughput have been explored and implemented. In 32-bit DDFS system, quarter wave symmetry technique is used to store only one quarter of the sine wave, whereas the ROM look-up table is partitioned into three 4-bit sub-ROMs based on angular decomposition technique and trigonometric identity. Exploiting the advantages of sine-cosine symmetrical attributes...