一种用于TRIAC导通角测量的时钟振荡电路  

An Oscillating Circuit for TRIAC Conduction Angle Measurement

作　　者：周英娜 郭宝明[1] 冯玲玲[1] 李威[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《微电子学》2015年第4期454-456,460,共4页Microelectronics

摘　　要：基于0.5μm BCD工艺,设计了一种频率可调的时钟振荡器。通过环路控制,该振荡器的频率可以跟随输入线电压频率的变化,二者之间满足定量关系。在TRIAC调光的LED驱动芯片中,随输入线电压频率变化的振荡器能够为导通角测量技术提供可靠的基础时钟。HSPICE仿真结果表明,输入线电压在50~60Hz范围内变化时,振荡器的频率可有效跟随其变化,误差小于2%。A frequency-tunable clock oscillator was designed based on 0.5 μm BCD process. The frequency of the oscillator could follow the change of the AC line frequency by controlling the loop circuit, and the two frequencies had a quantitative relationship. It could be used in the TRIAC dimming LED driver chip to provide a reliable basic clock for the conduction angle measurement technique. HSPICE simulation results showed that when the AC line voltage frequency changing range was 50-60 Hz, the frequency of the oscillator could follow the changing frequency effectively, and the deviation was less than 2%

关 键 词：时钟振荡器 频率可调 TRIAC调光 导通角测量 

分 类 号：TN433[电子电信—微电子学与固体电子学]