NORCHIP 2012Pub Date : 2012-11-01DOI: 10.1109/NORCHP.2012.6403120
P. Lu, P. Andreani, A. Liscidini
{"title":"A 90nm CMOS gated-ring-oscillator-based 2-dimension Vernier time-to-digital converter","authors":"P. Lu, P. Andreani, A. Liscidini","doi":"10.1109/NORCHP.2012.6403120","DOIUrl":"https://doi.org/10.1109/NORCHP.2012.6403120","url":null,"abstract":"Two branches of gated ring oscillators (GRO) act as the delay lines in 2-dimension Vernier time-to-digital converter (TDC). The proposed architecture reduces dramatically the inherent latency of vernier structure. The already small quantization noise of the standard Vernier TDC is further first-order shaped by the GRO operation. The TDC has been simulated in 90nm CMOS technology. Operating from 50MHz reference frequency, it achieves a resolution better than 2ps assuming a signal bandwidth of 1.56MHz (OSR=16), for a minimum current consumption of 1.8mA from 1.2V.","PeriodicalId":332731,"journal":{"name":"NORCHIP 2012","volume":"4 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131752196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NORCHIP 2012Pub Date : 2012-11-01DOI: 10.1109/NORCHP.2012.6403114
Sima Payami, A. Ojani
{"title":"An operational amplifier for high performance pipelined ADCs in 65nm CMOS","authors":"Sima Payami, A. Ojani","doi":"10.1109/NORCHP.2012.6403114","DOIUrl":"https://doi.org/10.1109/NORCHP.2012.6403114","url":null,"abstract":"A CMOS fully differential high gain-bandwidth (GBW) product operational amplifier (OpAmp) is presented in this paper. In order to achieve a high gain, the Nested gain-boosting technique [1] is employed. The design is implemented in a 1.1V standard 65nm CMOS process. The DC-gain of the OpAmp is larger than 77.9dB with the unity-gain frequency of 4.61GHz while achieving 76.2 degrees of phase margin (PM). Applying the maximum input swing, the output signal settles to 0.01% accuracy in less than 3.8ns. The output total harmonic distortion (THD) of the OpAmp is 0.586% for maximum signal swing at the frequencies near Nyquist frequency with the input-referred noise of 5.4nV/√Hz. The high GBW product of this design makes it suitable for 12-bit 200MS/s pipelined ADC applications.","PeriodicalId":332731,"journal":{"name":"NORCHIP 2012","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129853052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NORCHIP 2012Pub Date : 2012-11-01DOI: 10.1109/NORCHP.2012.6403151
Lauri Matilainen, Sakari Lahti, Otto Esko, E. Salminen, T. Hämäläinen
{"title":"Integration of TTA processor tools to Kactus2 IP-XACT design flow","authors":"Lauri Matilainen, Sakari Lahti, Otto Esko, E. Salminen, T. Hämäläinen","doi":"10.1109/NORCHP.2012.6403151","DOIUrl":"https://doi.org/10.1109/NORCHP.2012.6403151","url":null,"abstract":"This paper presents a new freely available, open source design flow to accelerate the usage of application-specific processors in System-on-Chip designs. The proposed flow combines our Transport-Triggered Architecture (TTA) processor toolset and Kactus2 IP-XACT design environment. The IP-XACT standard and our Kactus2 tool make it easy to integrate and configure intellectual property (IP) components from multiple vendors whereas the configurable TTA provides a fast and efficient path from C-to-VHDL. We present 3 use cases for TTA: as a ready-made fixed accelerator, a general-purpose processor, and a tailored application-specific processor. Moreover, management of instance-specific data in IP-XACT is discussed. The combined design flow is presented in detail step-by-step, and the user time spent on each step is evaluated. Provided that C source codes and IP-XACT library are available, a non-HW oriented engineer can implement an FPGA based multiprocessor product in less than 5 hours.","PeriodicalId":332731,"journal":{"name":"NORCHIP 2012","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129078777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NORCHIP 2012Pub Date : 2012-11-01DOI: 10.1109/NORCHP.2012.6403149
Behrad Niazmand, M. Reshadi, A. Reza
{"title":"PathAware: A contention-aware selection function for application-specific Network-On-Chips","authors":"Behrad Niazmand, M. Reshadi, A. Reza","doi":"10.1109/NORCHP.2012.6403149","DOIUrl":"https://doi.org/10.1109/NORCHP.2012.6403149","url":null,"abstract":"Network-on-Chip (NoC) has been introduced as a novel solution to overcome the constraints met in on-chip interconnection networks. Performance of NoCs is one of the important concerns of researchers and designers. One of the factors that can affect performance in on-chip networks is the occurrence of congestion when routing packets. In this paper we introduce an output selection function, named “PathAware”, which can be exploited with any adaptive routing algorithm. The main purpose is to address the situations in which more multiple output ports are chosen as candidates and to reduce latency and balance traffic load by selecting the appropriate output port leading to a minimal path. In order to avoid deadlock, we have exploited turn model adaptive routing algorithms. Simulation results demonstrate that when using “PathAware” selection function along with “West-First” and “Odd-Even” adaptive routing algorithms, it can outperform “Random”, “Buffer-Level” and “Neighboron-Path” selection functions in terms of latency and an improvement of 41% can be achieved (in best case), while imposing a negligible overhead on energy consumption.","PeriodicalId":332731,"journal":{"name":"NORCHIP 2012","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127335032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NORCHIP 2012Pub Date : 2012-11-01DOI: 10.1109/NORCHP.2012.6403119
Nadeem Afzal, J. Wikner
{"title":"Power efficient arrangement of oversampling sigma-delta DAC","authors":"Nadeem Afzal, J. Wikner","doi":"10.1109/NORCHP.2012.6403119","DOIUrl":"https://doi.org/10.1109/NORCHP.2012.6403119","url":null,"abstract":"A hardware efficient arrangement of digital-to-analog conversion blocks is presented by segmenting digital-to-analog converter (DAC). This segmenting of DAC is done by using buss-split design of digital sigma-delta modulator (DSDM). The reduction in the word length of input to both DSDM and DAC is analyzed with respect to performance because the input word length decides the complexity of these components. We show that effective performance can be achieved from the presented hardware efficient arrangement. All conclusions are drawn based on theory and simulations.","PeriodicalId":332731,"journal":{"name":"NORCHIP 2012","volume":"62 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114057861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}