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• W2176031985 abstract "This dissertation presents a design and implementation of a novel flash ADC architecture for ultra wide band applications. The advancement in wireless technology takes us in to a world without wires. Most of the wireless communication systems use digital signal processing to transmit as well as receive the information. The real world signals are analog. Due to the processing complexity of the analog signal, it is converted to digital form so that processing becomes easier. The development in the digital signal processor field is rapid due to the advancement in the integrated circuit technology over the last decade. Therefore, analog-to -digital converter acts as an interface in between analog signal and digital signal processing systems. The continuous speed enhancement of the wireless communication systems brings out huge demands in speed and power specifications of high-speed low-resolution analog-to -digital converters. Even though wired technology is a primary mode of communication, the quality and efficiency of the wireless technology allows us to apply to biomedical applications, in home services and even to radar applications. These applications are highly relying on wireless technology to send and receive information at high speed with great accuracy. Ultra Wideband (UWB) technology is the best method to these applications. A UWB signal has a bandwidth of minimum 500MHz or a fractional bandwidth of 25 percentage of its centre frequency. The two different technology standards that are used in UWB are multiband orthogonal frequency division multiplexing ultra wideband technology (MB-OFDM) and carrier free direct sequence ultra wideband technology (DS-UWB). ADC is the core of any UWB receiver. Generally a high speed flash ADC is used in DS-UWB receiver. Two different flash ADC architectures are proposed in this thesis for DS-UWB applications. The first design is a high speed five bit flash ADC architecture with a sampling rate of 5 GS/s. The design is verified using CADENCE tool with CMOS 90 nm technology. The total power dissipation of the ADC is 8.381 mW from power supply of 1.2 V. The die area of the proposed flash ADC is 186 μm × 210 μm (0.039 mm2). The proposed flash ADC is analysed and compared with other papers in the literature having same resolution and it is concluded that it has the highest speed of operation with medium power dissipation. iii The second design is a reconfigurable five bit flash ADC architecture with a sampling rate of 1.25 GS/s. The design is verified using CADENCE tool with UMC 180 nm technology. The total power dissipation of the ADC is 11.71 mW from power supply of 1.8 V. The die area of the implementation is 432 μm × 720 μm (0.31104 mm2). The chip tape out of the proposed reconfigurable flash ADC is made for fabrication." @default.
• W2176031985 created "2016-06-24" @default.
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• W2176031985 date "2015-01-01" @default.
• W2176031985 modified "2023-09-26" @default.
• W2176031985 title "Design and Implementation of a Novel Flash ADC for Ultra Wide Band Applications" @default.
• W2176031985 hasPublicationYear "2015" @default.
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