Norchip 2007最新文献_第4页

Modeling capacitive links for broadband inter-chip communication 宽带芯片间通信电容链路建模

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481058

O. Viitala, J. Flak, S. Lindfors

引用次数: 4

A spectrum shaping technique to control spectrum emission of UTRA LTE user equipment 一种控制UTRA LTE用户设备频谱发射的频谱整形技术

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481051

B. Priyanto, T. B. Sørensen, O. K. Jensen, T. Larsem, T. Kolding, P. Mogensen

{"title":"A spectrum shaping technique to control spectrum emission of UTRA LTE user equipment","authors":"B. Priyanto, T. B. Sørensen, O. K. Jensen, T. Larsem, T. Kolding, P. Mogensen","doi":"10.1109/NORCHP.2007.4481051","DOIUrl":"https://doi.org/10.1109/NORCHP.2007.4481051","url":null,"abstract":"For the UTRA long term evolution (LTE), the transmit signal spectrum must comply with stringent spectrum emission mask requirements because of very low guard band size for high spectral efficiency. Compared to e.g. WCDMA, the requirements are tightened, which calls for efficient user equipment (UE) transmitter design, to balance the tradeoff among performance and hardware complexity. In this paper a spectrum shaping technique suitable for LTE user equipment is proposed and evaluated. The key component of this technique is an inverse Chebyshev digital IIR filter which has maximally flat in the passband and sharp transition from passband to stopband. We compare this technique with the well-known time windowing method which offers low implementation complexity. We study the two techniques impact on both error vector magnitude (EVM) and spectrum emission for two different LTE system bandwidths and for various bandwidth allocations for the user. Results show that for wideband setting (10 MHz) both techniques are able to produce acceptable EVM values less than 0.2%. However, for narrowband setting (1.4 MHz), only digital filtering performs sufficiently well since the time windowing method fails when the window overlap size is greater than the cyclic prefix length.","PeriodicalId":448673,"journal":{"name":"Norchip 2007","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127358162","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}

引用次数: 3

A low voltage high precision CMOS bandgap reference 低电压高精度CMOS带隙基准

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481079

Xinpeng Xing, Zhihua Wang, Dongmei Li

引用次数: 11

High CMRR and low THD current-mode instrumentation amplifier using current inversion technique 采用电流反转技术的高CMRR和低THD电流模式仪表放大器

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481064

B. Babaei, S. Mirzakuchaki

引用次数: 11

Power optimized partial product reduction interconnect ordering in parallel multipliers 功率优化部分乘积减少互连顺序在并行乘法器

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481034

Saeeid Tahmasbi Oskuii, P. G. Kjeldsberg

引用次数: 14

QCA-LG: A tool for the automatic layout generation of QCA combinational circuits QCA- lg:用于自动生成QCA组合电路版图的工具

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481078

T. Teodósio, Leonel Sousa

引用次数: 69

Decimation filter for a low-power sensor-interface system 用于低功耗传感器接口系统的抽取滤波器

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481040

E. Laulainen, M. Kosunen, L. Koskinen, M. Paavola, K. Halonen

引用次数: 5

Evaluation of active cancellation of substrate noise in mixed-signal ICs 混合信号集成电路中衬底噪声主动消除的评价

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481065

Z. Baghchehsaraei, S. Kristiansson, F. Ingvarson, K. Jeppson

{"title":"Evaluation of active cancellation of substrate noise in mixed-signal ICs","authors":"Z. Baghchehsaraei, S. Kristiansson, F. Ingvarson, K. Jeppson","doi":"10.1109/NORCHP.2007.4481065","DOIUrl":"https://doi.org/10.1109/NORCHP.2007.4481065","url":null,"abstract":"In mixed-signal integrated circuits interference between noisy and sensitive circuits is a serious problem. Active cancellation of this substrate coupled noise was proposed about a decade ago and has been claimed to be more efficient than passive decoupling (DC/capacitive grounding). Most of the previously presented papers have investigated active decoupling methods using simple, less accurate, resistive network models as the common substrate. In this paper two common active decoupling circuits (feedforward and feedback) have been investigated using an accurate substrate model based on z-parameters. Three different configurations of contacts have been investigated: 1. all the contacts are close to each other; 2. just guard bands are close to each other; and 3. when guard rings are implemented. Conclusions have been reached with the aid of theoretical and simulation based approaches. When distances between contacts are small, the level of suppressed noise highly depends on the type of active decoupling circuit. In this case, if backplane is floating there is an optimum op-amp gain which should be used in order to gain the minimum coupled noise level. Conversely, when distances are large, none of the mentioned effects have been noticed. When guard rings are in use instead of guard bands, regardless of the fact that overall noise level is better, simple DC grounding is preferred.","PeriodicalId":448673,"journal":{"name":"Norchip 2007","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122641639","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}

引用次数: 2

Design of a fourth-order continuous-time filter for UWB receivers 超宽带接收机四阶连续时间滤波器的设计

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481072

Xi Zhu, J. Moritz, Yichuang Sun

引用次数: 4

D-latch for subthreshold floating-gate circuits exploiting threshold elements 用于利用阈值元件的亚阈浮门电路的d锁存器

Norchip 2007 Pub Date : 2007-11-01 DOI: 10.1109/NORCHP.2007.4481059

J. Alfredsson, S. Aunet

引用次数: 2