نتایج جستجو برای: digital conversion
تعداد نتایج: 416597 فیلتر نتایج به سال:
............................................................................................................................ iii Acknowledgments............................................................................................................... v List of Tables .................................................................................................................. xiii List...
The new capabilities of smart sensing systems namely, adaptability, reconfiguration, lowenergy consumption and cost, between others, require a wisely selection of the methods that are use to perform analog to digital conversion. It is very important to optimize the trade-offs between, resolution, accuracy, conversion rate, and energy consumption, between others, and above all to adapt dynamical...
Photonic Analog-to-Digital Conversion (ADC) has a long history. The premise is that the superior noise performance of femtosecond lasers working at optical frequencies enables us to overcome the bottleneck set by jitter and bandwidth of electronic systems and components. We discuss and demonstrate strategies and devices that enable the implementation of photonic ADC systems with emerging electr...
Digital signal processing applications are specified with floating-point data types but they are usually implemented in embedded systems with fixed-point arithmetic to minimise cost and power consumption. Thus, methodologies which establish automatically the fixed-point specification are required to reduce the application time-to-market. In this paper, a new methodology for the floating-to-fixe...
Two techniques for performing pixel level analog to digital conversion (ADC) are reviewed. The first is an oversampling technique which uses a one bit first order Ez modulator for each 2 x 2 block of pixels to directly convert photocharge to bits. Each modulator is implemented using 17 transistors. The second technique is a Nyquist rate multi—channel--bit—serial (MCBS) ADC. The technique uses s...
Principles and possibilities for design and implementation of parallel analog to digital converters for application in ternary CMOS digital systems are considered and proposed in the paper. Such converters perform signal conversion from analog to ternary digital signal in CMOS ternary digital systems. First, general principle and structure for implementation and design of CMOS parallel analog t...
Feasibility of Software Radio mainly depends on the availability of a suitable hardware platform. A basic feature of this hardware platform is the ability to process signals of different mobile communications standards, which are usually based upon a diversity of master clock rates. Hence, the conversion between different sample rates is an important functionality of a Software Radio receiver. ...
A simple, inexpensive design is presented for the rapid conversion of the popular MD-4 Polaroid land camera to a high quality digital gel documentation system. Images of ethidium bromide stained DNA gels captured using the digital system were compared to images captured on Polaroid instant film. Resolution and sensitivity were enhanced using the digital system. In addition to the low cost and s...
A low voltage incremental analog-to-digital converter with a pipelined architecture is presented. Using first order modulators the conversion time is significantly reduced even at low sampling rates while maintaining high resolution. The switched capacitor converter is designed to operate with a 1.8V power supply and uses three pipelined modulators. With careful design and digital correction it...
Introduction This project’s purpose is to become familiar with analog to digital conversion on a PIC micro-controller. Four programs demonstrate: assembly timing, A/D conversions, A/D conversion rates, and RC circuit time constants. The micro-controller is a 28 pin DIP PIC16F876 manufactured by Microchip. The PIC voltage input is +5 volts DC via a μA7805 dc/dc voltage regulator. The compiler is...
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