In this paper we describe differential circuit of charge pump for voltage management systems, their evolution and improvement in design. The systems are powered by solar cells and generate different voltage levels which are suitable for systems on-chip integrated regulator applications. The voltage regulator outputs voltage from low power digital circuit, -2V for memory, and from 2V to 12V for input and output components. The circuits were simulated using LT SPICE software.

In this paper, we present a CMOS voltage regulator for application in electric device. This works shows that unlike the traditional voltage converter, this regulator can achieve high efficiency with a good step-down voltage ratio. The circuits which are implemented in this paper is simulated with LT SPICE tool of computer.

The paper describes variable circuits technique the enable of differential circuit of charge pump. It is able to pump an input voltage of 2V to measure several output voltage through several clock signal with each pumping capacitor of 1 pF and smoothing capacitor of 1 pF at the output. From the simulation result, it is evident that charge pump circuits offer verity high voltage pumping gain. The circuits which are implemented in this paper is simulated with LT SPICE tool of computer.

The paper describes variable circuits technique the enable of differential circuit of charge pump. It is able to pump an input voltage of 2V to measure several output voltage through several clock signal with each pumping capacitor of 1 pF and smoothing capacitor of 1 pF at the output. From the simulation result, it is evident that charge pump circuits offer verity high voltage pumping gain. The circuits which are implemented in this paper is simulated with LT SPICE tool of computer.

This research aims to develop parts for Advanced Fuel/Oil Filtering Re- circulation applicable to this kind of regulation proof engines. These parts can play a role of converting traditional air emission type crankcase into recovery type crankcase so that the engine can deal with environmental regulations, which do not allow minimal amount of toxic gas discharge. For the experiment, test method and specially made testing equipment are prepared. The results showed that Oil separation efficiency of the Cyclone type crank case oil separator was higher than one of the partition wall type in bench test and that Emission gas of the cyclone type oil separator was higher than one of the partition wall type in vehicle test.

In general, a valve body of the automatic transmission(AT) is controlled by the clutch, the brake and lubricating oil flow in a hydraulic system and lubricant flow for each valve can be adjusted independently. To increase the lifetime of AT, the lubrication flow rate in a valve body for a 6 speed AT based parallel hybrid electric vehicle must be provided with proper oil distribution and control. In this study, we carried out several experiments without the inner parts of AT and with a AT assembly. The variation of the flow rate on oil temperature and pressure between an oil supply port and the outlets of the lubrication port was evaluated and analyzed. In the case of AT without the inner parts, it was evident that as the oil required for an operation of the clutch and brake was discharged from the outlet port, the flow rate from each lubrication port is decreased. However, the flow rate of the AT assembly was slightly increased. In addition, the lubrication flow rate was increased with increasing the oil temperature, and also it was reduced with increasing the oil pressure. Details of the resulting data are discussed.

The design of a memory control chip is described which is intended for embedded operation in VLSI Chip for 3D image application. It consists of two SRAMs and memory controller. The two memories section and their address counters are being swapped from the storage to the call clock. The systems offers improved accuracy, repeatability, portability, and flexibility not available in current commercial systems. To reduced a chip, 4T(4 transistors) SRAM cells are used instead of the standard SRAM cells 6T (6 transistors) by which the leakage current is drastically reduced and low power is achieved. The layout of the memory chip is realized using Electric layout editor, the DRC and LVS is verified using Electric and post layout simulated with LT SPICE tool of computer.