Abstract This paper presents a pre-amplifier latch based CMOS comparator design. This design is premeditated to be used as a comparator window. This design is attractive due to its low power dissipation and speed. Preamplifier implies a cascode structure which stabilizes the output voltage and latch with its regenerative feedback which makes comparison fast along with detection of small difference between the inputs. The... This paper presents a pre-amplifier latch based CMOS comparator design. This design is premeditated to be used as a comparator window. This design is attractive due to its low power dissipation and speed. Preamplifier implies a cascode structure which stabilizes the output voltage and latch with its regenerative feedback which makes comparison fast along with detection of small difference between the inputs. The design is simulated in 90-nm CMOS technology using Cadence EDA software. This design provides a low power of 55 W with a speed of 55 MHz and supply voltage of 1.2 V. Read More Read Less

Abstract The smart-power-grid brings opportunity and challenges to the power system protection and control. In previous century, there has nothing variation in the fundamental structure of the electrical power grid and vehicle networks. Rapid progress in communication and measurement techniques sharpens progress of Wide area Protection depend on the wide area measurement system. Smart-power-grid is considered as modern electric power grid basic physical and... The smart-power-grid brings opportunity and challenges to the power system protection and control. In previous century, there has nothing variation in the fundamental structure of the electrical power grid and vehicle networks. Rapid progress in communication and measurement techniques sharpens progress of Wide area Protection depend on the wide area measurement system. Smart-power-grid is considered as modern electric power grid basic physical and organizational structure and facilities for good efficiency and reliability. It is through automatic control high power converters, modern communications infrastructure, sensing and metering technologies and modern energy management techniques depend on demand energy and network availability. In this paper, the background of smart-power-grid is explained. Smartpower- grid latest technologies It provide the non- conventional instrument transformer clock synchronization and data synchronization offer great opportunities for development of Wide area Protection. According to this the concept the content and promote the Wide area Protection. Some of the key technologies like wide area measurement system and wide area communication system are analyze. At the end development of Wide area Protection in smart-power-grid are prospected. Read More Read Less

Abstract In this paper, we have a designed a low voltage CMOS operational transconductance amplifier (OTA) for high speed transmission with an operating voltage 0.5 V. The transistors are operating in the sub-threshold region with source degeneration for transconducatnce improvement. The OTA achieves a DC gain (Ao) of 26 dB, a gain-bandwidth product (GBW) of 750 MHz, slew rate (SR) of of 3.7 V... In this paper, we have a designed a low voltage CMOS operational transconductance amplifier (OTA) for high speed transmission with an operating voltage 0.5 V. The transistors are operating in the sub-threshold region with source degeneration for transconducatnce improvement. The OTA achieves a DC gain (Ao) of 26 dB, a gain-bandwidth product (GBW) of 750 MHz, slew rate (SR) of of 3.7 V s, a phase margin (PM) of 98º, DC offset of 2.2 mV and a power dissipation of 250 W under no load condition The proposed OTA is simulated in 90-nm CMOS technology using Cadence EDA software. Read More Read Less