摘要：To meet the demands for a number of LEDs,a novel charge pump circuit with current mode control is *** is achieved by operating the current mirrors and the output current of the operational transconductance *** the steady state,the input current from power voltage retains constant,so reducing the noise induced on the input voltage source and improving the output voltage *** charge pump small-signal model is used to describe the device’s dynamic behavior and *** predictions were verified by Hspice simulation and *** driving is up to 800 mA with a power voltage of 3.6 V,and the output voltage ripple is less than 45 *** output response time is less than 8μs,and the load current jumps from 400 to 800 mA.

摘要：Technology development and continuous down scaling in CMOS fabrication makes Mixed Signal Integrated Circuits (MSIC) more vulnerable to process variation. This paper presents a well defined novel design methodology for process variability aware design by incorporating the major challenge of statistical circuit performance relating the device and circuit level variation in an accurate and efficient manner to improve the reliability, robustness and stability of the circuit. The device sensitive parameters are identified and accurately quantified by continuous realistic assessments using statistical methods. The modularity of the methodology can be validated by the output performance obtained from the gain and phase response of OTA which is highly stable when subjected to worst case process variation scenario. In the proposed optimization, the circuit is strengthened by fixing the optimum aspect ratio without adding any additional compensation devices complicating the circuit resulting in low power consumption of only 0.116 mW in standard CMOS 0.18 μm technology with 1.8 V power supply.