一种温湿度测控电路芯片的研制  

A Temperature & Humidity Measurement and Control ASIC

作　　者：刘悦[1] 曹辉[1] 李向华[2] 黄均鼐[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海200433 [2]复旦大学电子工程系自动化控制研究室,上海200433

出　　处：《微电子学》2003年第3期262-265,共4页Microelectronics

基　　金：上海市科委PDC计划基金项目(007011013)

摘　　要：　提出了一种运用混合信号的温湿度测量控制电路的设计方案。通过温湿度传感器的电阻变化来检测温湿度的变化,运用RC振荡原理,把传感器的电阻值转换为频率信号,并使用一片ROM把频率信号映射为实际的温湿度,从而实现温湿度的测量。在芯片设计中,详细考虑了如何进行综合的优化设计。芯片的温度测量范围为-20～60°C,精度为±1°C;湿度测量范围为40%RH～90%RH,精度为±10%RH。芯片测试结果表明,该电路功能正确,性能良好,各项指标均达到预定目标。An ASIC for temperature and humidity measurement and control using mixed signal is presented in the paper Temperature and humidity are sensed by a thermistor sensor and a hygrometer sensor Based on the principle of RC oscillator, the resistance of the sensor is converted into frequency signals, which are mapped as the actual temperature and humidity by an ROM In this design, the synthesis optimization is deliberately considered The circuit can measure temperature to an accuracy of 1 °C in the range of -20 °C to 60 °C and measure humidity to an accuracy of 10%RH in the range of 40%RH to 90%RH Test results show that the chip operates properly and performs well

关 键 词：温度传感器 湿度计 专用集成电路 温湿度测控电路 采样模块 映射模块 芯片测试 

分 类 号：TN492[电子电信—微电子学与固体电子学] TP212.11[自动化与计算机技术—检测技术与自动化装置]