Abstract
In this paper, we describe about small sized and extremely low power consumption transceiver module for wireless sensor network, especially suitable for bio-signal transmission. Currently, many types of transceiver modules, such as Bluetooth, ZigBee, low power radio modules for 315MHz and so on, are available in the market. However, when we consider extremely small and light system including a battery and transceiver module for wireless sensor network installed on a human body, almost all the transceiver modules in the market consume too large power and too large area for assembling. In this study, we concentrated on realizing an extremely low power consumption and small/lightweight transceiver module for 315MHz radio band. As a result, we successfully designed and fabricated the transceiver module with size of 11×11×1.5 mm3 including a bipolar ASIC for radio circuit and 8bit micro controller. The operation currents of the receiver and transmitter are 2 and 1 mA, respectively for supply voltage of 2.5V. These results are generally sufficient for many cases of wireless sensor network systems not only for bio-signal applications.
