International Journal of Scientific Engineering and Technology (ISSN : 2277-1581) www.ijset.com, Volume No.1, Issue No.2 pg:134-138 01 April 2012 134 Simulation & Analysis of Sigma-Delta A/D Converter using VHDL-AMS Prerna Gupta, Head & Prof. Rita Jain Dept. of Electronics & Telecommunic ation Engg. LNCT Bhopal (M.P.) India Abstract: Analog to digital converter is afundamental component for digital processorssince every signal which needs to be processedusing digi tal algor it hms requir es the d igi tal data. Th e r e are many dif ferent type s o f A/D convertersare available but the sigma delta A/D converterhas their unique advantage over others as theyhave o nl y 10 to 15 pe rcent anal og compone nt s andr e s t ar e digi tal . Th i s makes it good c andi date whenthe A/D nee ds to in te grate with th e DSP in s in glechip, but the in te grati on of two domains createsdiff icul ty to e valu ate the be havior of A/D usin gnormal simu lator s he nce s pe cial s im ul ators ca ll edanalog and mi xed s ignal s imu lators are requir edin this paper we presented the detail simulationand analys is of sigma de lta A /D u s in g VH DL- AMS. Keywords : s igma d e lta A/D Conve r te r s, VH DL -AMS. 1. Introduction Signal processing is needed for almost every electronic system, & the techniques of processing can be broadly divided into two parts analog and digital, the analog systems are relative bulkier, less flexible and more sensitive to environmental conditions in the past they were the only possible choice because they don’t need the complex processors and other related components which were difficult to manufacture at that time, but the advancements in chip manufacturing technology making it possible to design powerful processors on single chip and at cheaper cost. Nowadays the digital processing is preferred because it can overcome almost every problem faced by the analog processing. The Digital Processing requires the signal in digital form hence for Digital Signal Processors needs internal or external A/D converters for external it could be of any type but for internal it is a totally different case because it requires compatibility with VLSI technology, in order to provide for monolithic integration of both the analog and digital sections on a single die. Since the Sigma Delta A/D converters are based on digital filtering techniques, almost 90% of the die is implemented in digital circuitry which enhances the prospect ofcompatibility [1]. 2. Sigma Delta A/D Converter This section describes the different technical terms and working of sigma delta A/D converter. 2.1 Sigma Delta Modulation The work on sigma-delta modulation was developed as an extension to the well established delta modulation.
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PP 134-138 Simulation & Analysis of Sigma-Delta AD Converter Using VHDL-AMS
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7/28/2019 PP 134-138 Simulation & Analysis of Sigma-Delta AD Converter Using VHDL-AMS