A temperature-compensated CMOS ring oscillator for DC-DC converters
نویسندگان
چکیده
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.
منابع مشابه
An Integrated Voltage-Mode Boost DC-DC Converter for Portable Electronic Systems An Integrated Voltage-Mode Boost DC-DC Converter for Portable Electronic Systems
A monolithic CMOS voltage-mode, boost DC-DC converter with integrated power switches and on-chip pulse-width modulation (PWM) technique of switching control is presented in this paper. The PWM scheme used in this converter is constructed by a CMOS ring oscillator, whose duty is compensated by a pseudo hyperbola current generator to achieve almost constant frequency operation. The proposed boost...
متن کاملA High Efficiency Low-Voltage Soft Switching DC–DC Converter for Portable Applications
This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...
متن کاملMaximum power point tracking CMOS circuit to connect a solar cell into a solid-state battery
This paper presents a Maximum Power Point Tracking (MPPT) circuit in CMOS technology for integration into an energy harvesting solution, comprising a solid-state thinfilm lithium battery fabricated in the back-side of a plastic solar-cell. The MPPT CMOS circuit is required in the energy transfer process from the solar cell to the battery. The MPPT circuit was designed in the 0.7 μm CMOS process...
متن کاملLow power, temperature and process compensated CMOS ring oscillator
The modern communication technologies require the use of CMOS monolithic oscillators because of their small manufacturing costs and high integration capabilities. The disadvantages of CMOS ring oscillators can be compensated through the use of a VCO architecture. The control voltage of this VCO should compensate for the frequency drift due to process and temperature.
متن کاملA Markovian Approach Applied to Reliability Modeling of Bidirectional DC-DC Converters Used in PHEVs and Smart Grids
In this paper, a stochastic approach is proposed for reliability assessment of bidirectional DC-DC converters, including the fault-tolerant ones. This type of converters can be used in a smart DC grid, feeding DC loads such as home appliances and plug-in hybrid electric vehicles (PHEVs). The reliability of bidirectional DC-DC converters is of such an importance, due to the key role of the expec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEICE Electronic Express
دوره 10 شماره
صفحات -
تاریخ انتشار 2013