Be abstract we present a 200 mss 2x interleaved 14 bit pipelined sar. Abstract in this paper, design of low power, 9bit pipeline adc architecture is introduced. The pipelined adc is a practical and efficient structure for moderate speed1200mss, moderate resolution 1016 bits adcs. Page 1 ee247 lecture 22 adc converters pipelined adcs eecs 247 lecture 22. The analogtodigital converter adc is a key component in digital communications receive channels, and the correct choice of adc is critical for optimizing system design. Index terms analogtodigital converter, capacitor mismatch. The ascent max ductless fume hood with secondary hepa filter has an efficiency of 99. Given that continuous queries must be known a priori, pipelinedb is not an adhoc data warehouse. Migrating to the new pic24f pipeline and sigmadelta adcs.
Below is a simulink model for a pipelined adc including nonidealities such as offsets, matching, and noise. Keywords pipelined adc, mdac, sc technique, matlab model, thermal noise, opamp. Pipelined adc with four 3bit stages each stage resolves two bits. In this article, we discuss what design factors drive the selection of the adc, how to specify the adc and when to choose between a pipeline adc and a sigmadelta. A novel design of 9bit pipeline adc manju devi, arunkumar p chavan, dr k. 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. Keywords analogtodigital converter pipeline adc highswing ampli. Introduction a pipelined adc architecture offers good tradeoff between conversion rate, resolution and power con. Pipeline adc builtin self test hal archive ouverte. In the second phase, called the amplifying phase, c f is switched into feedback around the amplifier and the bottom. A digitally calibrated 12 bits 25 mss pipelined adc with. Block diagram a 10bit pipeline adc was designed with 100mhz nyquist frequency at full scale of 500mv. Pdf a low power pipeline adc with digital correction logic.
The idea that an adc can be put at the antenna and somehow rid a high performance radio of the lna, bpf, agc, and mixer is a pipe dream. Folding and interpolating adcs ucla samueli school of. Yoshioka et al 10bit, 125 mss, 40 mw pipelined adc in 0. This type of fume hood is suitable for applications involving solid particles, chemicals in powdered form and aerosols. Hugh barnaby, chair bertan bakkaloglu jennifer blain christen arizona state university august 2012. Specific new design techniquesalgorithms include 1 a powerefficient, capacitor ratioindependent conversion scheme, 2 a pipeline stagescaling algorithm, 3 a nested cmos gainboosting technique, 4 a. Haze, basic block of pipelined adc design requirements basic block of pipelined adc design requirements vilem kledrowetz, jiri haze dept. The only way to interact the digital system with the analog system is. This research is dedicated to develop a pipeline adc design methodology with minimum power dissipation, while keeping relatively high speed and high resolution. Page 21 measurement results 12bit adc w extra 2bits for calibration.
Adc1 control register 1 this register controls the basic operation of the adc module, including. A 12bit 50m sampless digitally selfcalibrated pipelined adc by xiaohong du a thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of master of science major. We present here a high speed converter configuration designed to multiplex 3 analog channels through one analog to digital converter. Keywords analog to digital converter, pipelined adc, sar adc, timeinterleaved technique i. Pipelined adc free download as powerpoint presentation. A figureofmerit to evaluate the performance of an adc is its information transfer capacity. Based on your location, we recommend that you select. Pipelined adc architecture figure 1 shows a block diagram of a 12bit pipelined adc. Adc architectures university of california, berkeley. A pipelined adc, reconfigurable over bandwidths of 0. In this paper, a 10bit 50mss nyquistrate cmos pipelined analogtodigital converter adc with digital correction is presented for the wlan application.
A 10 bit opampsharing pipeline analogtodigital converter adc using a novel mirror telescopic operational amplifiers opamp with dual nmos differential inputs is presented. You can merge pdfs or a mix of pdf documents and other files. A design tradeoff which exists for pipeline adcs is the choice between a larger number of bits resolved per stage hence less latency, but more design complexity, or a fewer number of bits. A pipeline adc architecture has a 3 stage pipeline adc with 3bit flash adc followed by a 3 bit dac at each stage.
The analog to digital converter is a critical stage for the system going from the very frontend stages to digital memories. The pipelined adc including nonidealities was modeled in matlab simulink simulation environment. Modeling and implementation of a 6 bit, 50mhz pipelined. The basic idea behind the pipeline adc is that each stage will first sample and hold the input then compare this to vref2. Reference 9 takes use of dummy sampling capacitances. Top level performance simulation to verify the adcs top level performance, the adc was. A 10bit, 200mss cmos pipeline adc using new shared. The direct conversion approach is a good one for exploiting todays adc technology and provides a good platform for migrating to future adc. Secondly, the capacitor is connected to the input and output nodes of the amplifier only during the hold phase. Sha stage 1 stage 2 stage 10 2 2 10 vin dout adc dacg 2 vin1 vres1 clk 1. Understanding pipelined adcs maxim integrated analog. 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.
How to choose september 16, 2016 by janet heath assuming that you are familiar with the fundamental specifications of an adc and what they mean, the next step is to know your entire signal chain well and then work to fit the adc to the requirements. The analog output signal of ith stage in the pipelined adc based on input signal can be expressed as. Video lectures on cmos mixed signal vlsi design by prof. During the first clock phase, the signal is sampled onto the sampling capacitors c s and c f. This thesis addresses these challenges using the pipeline adc as a demonstration platform. How to merge pdfs and combine pdf files adobe acrobat dc. Analogtodigital converters for software definable radios. Adc is the architecture of choice for applications that require both speed and accuracy and where latency is not concern. Ee247 lecture 23 university of california, berkeley.
Click, drag, and drop to reorder files or press delete to remove any content you dont want. Simulation results confirm that 16bit linearity can be achieved after calibration for an adc with 0 1% capacitor mismatches and 60 db opamp gain. Highperformance pipeline ad converter design in deep. Introduction an adc with a medium speed and a medium resolution is an essential component for 802. Pipeline adc is a mixedsignal system, which consists of sample and hold amplifier sha, subadc, multiplying digitaltoanalog converter mdac and bandgap voltage reference. Correction of nonideal amplifiers effect in pipelined adcs. However, they also bring some drawbacks affecting the adc performance, such as nonlinearity and distortion.
How to tradeoff and get rid of these bad factors are the hot points in the lowpower pipelined adc design area. Choose the right data converter for your application. The pipelined adc architecture is suitable to the sampling rate and the resolution. Esco max ductless fume hood with secondary hepa filter. Adc, a very slow ramp signal has been injected to the adc input. Itc2ncs where itc is the information transfer capacity in symbolssec, n is the number of bits and cs is the conversion speed, for example, an 8bit, 1gsps adc has an itc of 2. Background calibration techniques for multistage pipelined. While the output of continuous queries may be explored in an adhoc fashion, all of the raw data that has ever passed through pipelinedb may not be because datapoints are discarded after theyve been read. A pipelined adc with digital correction for ieee 802.
Boser, a 12b, 75mss pipelined adc using openloop residue amplification, isscc dig. Therefore, the feedback gain from the output node to the input node of the amplifier is 1. Click add files and select the files you want to include in your pdf. A single ended version of the common capacitor flipover implementation of a 1. Pipelined adc analog to digital converter digital to. The effect of switch resistance on pipelined adc mdac. Among various adc architectures, the pipelined adc is considered as one of the best candidates to ful. A 12bit 50m sampless digitally selfcalibrated pipelined adc. Choose a web site to get translated content where available and see local events and offers. Examples of pipeline adc and successive approximation. Nonetheless, pipelined adcs of various forms have improved greatly in speed, resolution, dynamic performance, and low power in recent years. Reduction of power and area is achieved by completely merging the frontend sampleandhold ampli. It is a first step for a multiplexed 64 channel design.
551 1071 1484 186 757 131 289 608 507 781 92 860 672 1038 649 774 1553 1081 129 400 326 1595 1473 1320 1105 117 622 1561 1534 241 271 1015 1088 128 292 557 1366 1574 400 1181 489 114 1190 842 224 101 1183 13