Xiaojuan X.,Nanjing University of Posts and Telecommunications |
Xiaojuan X.,JiangSu Province Laboratory of RF Integrated and Micro Assembly Engineering |
Xincun J.,Nanjing University of Posts and Telecommunications |
Xincun J.,JiangSu Province Laboratory of RF Integrated and Micro Assembly Engineering |
And 5 more authors.
IEICE Electronics Express
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 0.5 μm double poly double metal CMOS technology. The test result shows that the frequency is about 1.2 MHz and the error (Δf/f) is about 3.5% in the temperature range 20-100°. The circuit is quite suitable for DC-DC converters. © IEICE 2013. Source