College of Electronic Science and Engineering, Nanjing university of Posts and telecommunications JiangSu Province Lab of RF Integrated and Micro Assembly Engineering
Ji XinCun
College of Electronic Science and Engineering, Nanjing university of Posts and telecommunications JiangSu Province Lab of RF Integrated and Micro Assembly Engineering
Guo Yufeng
College of Electronic Science and Engineering, Nanjing university of Posts and telecommunications JiangSu Province Lab of RF Integrated and Micro Assembly Engineering
Zhu Bing
College of Electronic Science and Engineering, Nanjing university of Posts and telecommunications JiangSu Province Lab of RF Integrated and Micro Assembly Engineering
Wang Lei
College of Electronic Science and Engineering, Nanjing university of Posts and telecommunications JiangSu Province Lab of RF Integrated and Micro Assembly Engineering
A novel current controlled CMOS ring oscillator is presented in this paper. Specially circuit structure and transistor parameters design is used to obtain good temperature coefficient. The designed ring oscillator circuit has been used in a CMOS step-up switching regulator controller which has been implemented using a 0.5μm double poly double metal CMOS technology. The test result shows that the frequency is about 1.2MHz and the error(Δf/f) is about 3.5% in the temperature range -20-100°C. The circuit is quite suitable for DC-DC converters.
