Nowadays, the use of multiple sensors for environmental detection could overcome the uncertainty and limitations of a single detector. Micro-integrated sensors composed of multiple sensors have become the development trend of future sensors. This paper describes the implementation of a multi-sensor signal processing circuit. By monitoring external signals through temperature sensor, humidity sensor, and pressure sensor, the physical quantity of sensors is converted into a digital signal output by integrated readout Circuit. And a novel switched capacitor circuit is proposed. In this paper ,the readout circuit designed on a 0.5μm typical process, the sensitivity of temperature is less than 0.5°C, the accuracy of on-chip ADC is 14bit, and the overall power consumption is less than 20mW. It lays the foundation for multi-sensor composite integration and miniaturization research.
An adjustable brightness LED driver with high efficiency, high stability and low power consumption is proposed. In order to obtain high stability at different working conditions, a novel voltage loop adaptive frequency compensation circuit is constructed. Moreover, the high efficiency of this system is realized by using the LDO power supply derived from the systems output, which reduces the system's power consumption. The different light intensities are obtained by setting the maximum of the LED load current. The LED driver is designed on a 0.18μm process with an input voltage range of 5V- 35V. Meanwhile, the working frequency is adjustable and synchronized with the external clock. The simulation results demonstrate that the LED driver is a single polar system through the adaptive frequency compensation circuit and eliminating the effect of zero-pole pair.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.