Low current, pulse-frequency modulation converter

• Main Authors: Shih-Chieh Liao, 廖士傑
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/86023484578794714759

碩士 === 逢甲大學 === 電子工程所 === 92 === In recent years, the CMOS integrated circuit technology has been successfully applied to a lot of systems. In order to provide efficient power for portable devices, the low voltage and low current circuits would be the trend for current CMOS development. To deal with faster and more complicated analog signals, most of research directions for pulse modulation circuits focus on the precise output waveform and fast response time. The design of pulse modulation circuit is in a mature stage now, however, due to the advance of process technology, how to achieve a low voltage, low power consumption, and fast response time is the main topic for my research. In this thesis, I will concentrate on the design of an accurate comparator, effective discharging route, as well as precise control of oscillator. This design is suitable for standard CMOS technology implementation and easy to make an IP circuit to use widely. From HSPICE simulation results, the operating frequency can achieve 200kHz and the operating voltage is 1.4V. The circuit of this thesis is designed by using tsmc 0.35μm CMOS 2P4M technology. It occupies an area of 0.438×0.391 mm2 and has a power consumption of 66μW from a 3.3V power supply.