BROWSE
Detail
Journal Article
1.5 V Sub-mW CMOS Interface Circuit for Capacitive Sensor Applications in Ubiquitous Sensor Networks
- Authors
- Sung Sik Lee, Ah Ra Lee, Chang Han Je, Myung Lae Lee, Gunn Hwang, Chang Auck Choi
- Issue Date
- 2008-10
- Citation
- ETRI Journal, v.30, no.5, pp.644-652
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, a low-power CMOS interface circuit is designed and demonstrated for capacitive sensor applications, which is implemented using a standard 0.35-μm CMOS logic technology. To achieve low-power performance, the low-voltage capacitance-to-pulse-width converter based on a self-reset operation at a supply voltage of 1.5 V is designed and incorporated into a new interface circuit Moreover, the external pulse signal for the reset operation is made unnecessary by the employment of the self-reset operation. At a low supply voltage of 1.5 V, the new circuit requires a total power consumption of 0.47 mW with ultra-low power dissipation of 157 μW of the interface-circuit core. These results demonstrate that the new interface circuit with self-reset operation successfully reduces power consumption. In addition, a prototype wireless sensor-module with the proposed circuit is successfully implemented for practical applications. Consequently, the new CMOS interface circuit can be used for the sensor applications in ubiquitous sensor networks, where low-power performance is essential.
- KSP Keywords
- CMOS logic, Capacitive sensor, Interface circuit, Low Supply Voltage, Low power dissipation, Reset operation, Total power consumption, Ultralow power(ULP), logic technology, low voltage, low-power CMOS