In this work a conventional pipelined adc architecture is selected to design a 12b, 100 mss adc in 0. Two different design approach of 3 bit structure, frequency of 5 ghz,supply voltage 1. Large dc gain and large capacitors are shown to be necessary to achieve high linearity in a pipelined adc. In this work three techniques to improve pipelined adc performance with respect to. Pipelined adc design and key tradeoffs are discussed. A capacitor memory erasing technique for pipeline adcs. The main operational amplifier op amp circuit is a full.
Pipelined adc design and enhancement techniques ebook written by imran ahmed. Read pipelined adc design and enhancement techniques by imran ahmed available from rakuten kobo. Introduction t he increasing demand for highresolution analog todigital converters adcs has stimulated many innovative design solutions. The pipelined adc is a practical and efficient structure for moderate speed1200mss, moderate resolution 1016 bits adcs. Pipelined adc design and enhancement techniques analog circuits and signal processing imran ahmed on. Pipelined adc design and enhancement techniques imran ahmed. Pipelined adcs have seen a tremendous growth in innovation and scope over the. The basic idea behind the pipeline adc is that each stage will first sample and hold the input then compare this to v ref 2. Together these techniques can be enabling technologies for both pipelined adcs and general mixed signal design in deep submicron technologies. By simulation their power dissipation calculated, measured 50% less power consumed in modified pipelined adc design. Abstract a set of lowpower techniques is proposed to realize low power design in pipeline analogtodigital converter adc.
Accuracy enhancement techniques in lowvoltage high. As such, when designing a pipelined adc a clear understanding of the design. Project work is in the area of analog and vlsi design. As such, when designing a pipelined adc a clear understanding of the design tradeoffs, and state of the art techniques is required to implement todays high performance low power adcs. A switched capacitor is used to sample and multiplying at each stage. Mdac design considerations capacitor matchinglinearity. This paper describes a 8 bits, 20 msampless pipeline analogtodigital converter implemented in 0. Use of multibitperstage architecture and design optimization can achieve. The paper describes design requirements of a basic stage called mdac multiplying digitalto. Acknowledgments i would like to express my sincere appreciation to my advisor prof.
Corresponding registers appear after the summaries, which include a detailed description of each bit. As such, when designing a pipelined adc a clear understanding of the design tradeoffs, and state of the art techniques is required to implement todays high. Operational transconductance amplifier design for a 16bit pipelined adc nordiana mukahar, siti hawa ruslan and warsuzarina mat jubadi. A 12bit 50m sampless digitally selfcalibrated pipelined adc. Design of low voltage high speed operational amplifier for. Design techniques for ultrahighspeed timeinterleaved analog todigital converters adcs by yida duan a dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in engineering. For a 16 bit pipelined adc that is clocked at 1 mhz, the required op amp must have unity gain frequency, fu at 3. Numerous motivating and instructive discussions with him are the reason for the success of this project. Pipelined adc design and enhancement techniques imran. New sndr enhancement techniques in pipelined adc request pdf. As such, when designing a pipelined adc a clear understanding of the design tradeoffs, and. A capacitor memory erasing technique for pipeline adc is introduced, which insert a clearing phase to the traditional working timing sequence of the mdac to erasing the residual charges on the sampling capacitor.
As such understanding both the basic concepts and the leading edge techniques required to realize pipelined adcs which meet the challenging speci. Design and implementation a 8 bits pipeline analog to digital. Pipelined adc design and enhancement techniques ebook by. In this paper, design of a high speed operational amplifier for pipelined adc. Power optimization in 3 bit pipelined adc structure. Sepke, comparator design and analysis for comparatorbased switchedcapacitor circuits, mit phd. Bicmos or bipolar processes, the mainstream of pipelined adc design has already. Background calibration techniques for multistage pipelined adcs with. Pipelined analogtodigital converters adcs have been used extensively in. The most important part in a pipelined adc is the operational amplifier which is used in sample and hold sh circuit.
In this paper, a 10bit 50mss nyquistrate cmos pipelined analogtodigital converter adc with digital correction is presented for the wlan application. Gain enhancement to increase cascode open circuit gain. Each stage contains a sampleandhold amplifier sha, a lowresolution analog todigital subconverter adsc, a lowresolution digitalto analog converter dac, and a subtractor. The model resolution is very flexible, and system level techniques are easily added. So high speed adc architecture like pipelined adc is used in umts base station receivers. Helsinki university of technology, electronic circuit design laboratory report 33, espoo 2002 circuit techniques for lowvoltage and highspeed ad converters mikko waltari dissertation for the degree of doctor of science in technology to be presented with due permis. Written for both researchers and professionals, pipelined adc design and enhancement techniques provides. A pipelined adc with digital correction for ieee 802. Written for both researchers and professionals, pipelined adc design and enhancement techniques. Pipelined adc design and enhancement techniques ebook por. Background calibration techniques for multistage pipelined adcs.
Background calibration techniques for multistage pipelined adcs with digital redundancy jipeng li, student member, ieee, and unku moon, senior member, ieee. This thesis explores a pipelined adc design that employs a variety of lowpower techniques such as dynamic residue amplification and incomplete settling in a unique way to maximize the speed while maintaining low energy 98 fjconvstep. Below is a simulink model for a pipelined adc including nonidealities such as offsets, matching, and noise. Index termsanalogtodigital converter adc, multistage adc, pipelined recycling, radixbased digital calibration. Trimming is one such method, but it cannot track varia. Single stage amplifier for a high gain design, two stage configurations might be the appropriate choice. Pipelined adc design and enhancement techniques book.
A block diagram of the subranging architecture is shown in. Basic block of pipelined adc design requirements vilem kledrowetz, jiri haze dept. Techniques to reduce adc power discussed include the elimination of the frontend sh, openloop. Pdf circuits and algorithms for pipelined adcs in scaled. Lee pipelined adc design and enhancement techniques por imran ahmed disponible en rakuten kobo. Pipelined adc architectures general pipelined system each stage performs an operation on the signal, provides. Index terms analog todigital converter adc, multistage adc, pipelined recycling, radixbased digital calibration. Accuracy enhancement techniques in lowvoltage highspeed pipelined adc design public deposited. Part of thedigital circuits commons,other electrical and computer engineering commons, and thesignal processing commons. Pipelined adc design and enhancement techniques springerlink. Introduction t he increasing demand for highresolution analogtodigital converters adcs has stimulated many innovative design solutions. To demonstrate these circuits and algorithms, two different adcs were designed.
Pipelined structure, as one of the typical architectures has been widely implemented in the adc design. Accuracy enhancement techniques in lowvoltage highspeed. Bibhudatta sahoo university of illinois at urbanachampaign. Circuit techniques used include a precise comparator, operational amplifier and clock management. Cascade several low resolution stages to obtain high overall resolution. High speed design techniques, edited by walt kester. Switchedcapacitor techniques for highaccuracy filter and adc design. Analog todigital converter architectures and choices for system design. A low power, middleresolution 710 bit, middle speed 20mhz200mhz pipelined adc is an important block in modern applications of telecommunication, consumer electronics, and medical electronics. Electrical engineering and computer sciences in the graduate division of the university of california, berkeley. Department of electrical and computer engineering slides by bibhudatta sahoo1 pipelined adc design a tutorial based on slides from dr. Pdf pipelined adc design and enhancement technqiues. From a 38 mw 12b 100 mss pipelined adc design to l ess than.
The resulting work advances the stateoftheart by simultaneously achieving a high. Specific new design techniquesalgorithms include 1 a powerefficient. Yun chiu, highperformance pipeline ad converter design in deepsubmicron cmos, berkeley phd. As such, when designing a pipelined adc a clear understanding of the design tradeoffs. As such, when designing a pipelined adc a clear understanding of the design tradeoffs, and state of the art techniques is required to. Analogtodigital converter architectures and choices for. Although the highest performance monolithic pipelined adcs are still built in. Adc snr is shown to be related to capacitor area, where to achieve a high snr large capacitors are required. Hence, there is need for accuracy enhancement techniques. Pipelined adc design and enhancement techniques by imran. In this paper a general method to design a pipelined adc. Circuit techniques for lowvoltage and highspeed ad converters. Adc1 control register 1 this register controls the basic operation of the adc module, including behavior in sleep and idle modes, and data formatting.
Department of electrical and computer engineering university of toronto abstract in this work three techniques to improve pipelined adc performance with respect to linearity and power consumption are presented. His keen insight into ic design led me into the right direction of the research. Use of multibitperstage architecture and design optimization can achieve 14bit performance as demonstrated in 5, but most pipelined adcs with more than 12bit resolution will usually require some kind of linearity enhancement techniques. Pipelined adc design a tutorial based on slides from dr.
Pipeline adc enhancement techniques computer engineering. Techniques to reduce adc power discussed include the elimination of. A 12bit 50m sampless digitally selfcalibrated pipelined adc xiaohong du iowa state university follow this and additional works at. Switchedcapacitor techniques for highaccuracy filter and adc design analog circuits and signal processing. Download for offline reading, highlight, bookmark or take notes while you read pipelined adc design and enhancement techniques. Highperformance pipeline ad converter design in deep. Jipeng li, accuracy enhancement techniques in lowvoltage highspeed pipelined adc design, oregon state university phd. Background calibration techniques for multistage pipelined. Many good adc architectures have been invented to satisfy different requirements in different applications. Accuracy enhancement techniques in lowvoltage highspeed pipelined adc design abstract approved. Pipelined adcs have seen phenomenal improvements in performance over the last few years. Analog to digital converter, operational trans conductance amplifier, design of all the blocks used in pipeline introduction this project report presents the design of 12bit pipeline adc operating at sampling rate of 100mhz.
Background calibration algorithm for pipelined adc with. Unku moon pipelined analog to digital converters adcs are very important building blocks in many electronic systems such as high quality video systems, high performance digital communication systems and high speed data acquisition systems. Operational transconductance amplifier design for a 16bit. Adc is the architecture of choice for applications that require both speed and accuracy and where latency is not concern. Design techniques for parallel pipelined adc by li lin. Pipelined adc design and enhancement techniques analog. Pipelined adc design and enhancement techniques hardcover.
Title digital gain error correction technique for 8bit pipeline adc forfattare author khalid javeed sammanfattning abstract an analogtodigital converter adc is a link between the analog and digital domains and plays a vital role in modern mixed signal processing systems. Pipelined adc architectures general pipelined system each stage performs an operation on the signal, provides the output for the following sampler, and, once the sampler has acquired the data, begins the same operation on the next signal. The pipelined adc had its origins in the subranging architecture which was first used in the 1950s as a means to reduce the component count and power in tunnel diode and vacuum tube flash adcs see references 1, 2. In this thesis, two novel accuracy improvement techniques to overcome the\ud accuracy limit set by analog building blocks opamps and capacitors in the context of\ud lowvoltage and highspeed pipelined adc design are presented. Cho, low power low voltage ad conversion techniques using pipelined architecture, doctor of philosophy in engineering, university of california berkeley, 1995 razavi, behzad. In this thesis, two novel accuracy improvement techniques to overcome the accuracy limit set by analog building blocks opamps and capacitors in the context of lowvoltage and highspeed pipelined adc design are presented.
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