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2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)最新文献

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A 1.8V 1MS/s rail-to-rail 10-bit SAR ADC in 0.18μm CMOS 1.8V 1MS/s轨对轨10位SAR ADC, 0.18μm CMOS
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401621
S. Saisundar, J. Cheong, M. Je
{"title":"A 1.8V 1MS/s rail-to-rail 10-bit SAR ADC in 0.18μm CMOS","authors":"S. Saisundar, J. Cheong, M. Je","doi":"10.1109/RFIT.2012.6401621","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401621","url":null,"abstract":"This paper presents a 10-bit, 1MS/s, rail-to-rail successive approximation register analog-to-digital converter (SAR ADC). The ADC uses a bootstrapped sampling switch to achieve better linearity and also adopts a generalized non-binary redundant algorithm and a rail-to-rail dynamic latched comparator to obtain higher Effective Number of Bits (ENOB). This ADC designed and fabricated in 0.18μm CMOS process achieves a signal-to-noise-and-distortion ratio (SNDR) of 58.9dB at 1MS/s which corresponds to an ENOB of 9.5. It also obtains a good linearity (DNL/INL) value of less than ±0.46LSB. At 1.8V supply, the ADC attains a Figure of Merit (FOM) of 181fJ/conversion-step. The ADC also consumes 34.6μW from a 1.2V supply with an ENOB of 8.7 resulting in a FOM of 83fJ/conversion-step.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"45 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":"130715636","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: 12
Envelope tracking technique for mobile handset application (Inviter Paper) 移动电话应用的信封跟踪技术(邀请书)
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401671
Bumman Kim, Dongsu Kim, Yungsung Cho, Jooseung Kim
{"title":"Envelope tracking technique for mobile handset application (Inviter Paper)","authors":"Bumman Kim, Dongsu Kim, Yungsung Cho, Jooseung Kim","doi":"10.1109/RFIT.2012.6401671","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401671","url":null,"abstract":"Envelope tracking technique is suitable to the transmitters for mobile handset and becomes a hot research item in recent years. In this paper, we will overview the research trends in this area. The supply modulator handles the modulated signal and the PA works only for RF amplification. Because of the separated functions, the architecture is a favored structure for multimode/multiband operation. The supply modulator is an ideal power management IC for a PA. This technique is perused to improve the efficiency at a high power level as well as at a low power level. Because of the enhanced efficiency at a low power level, the transmitter can provide good performance at a low/high mode PA for handset. These new developments of the ET technology will be introduced.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"40 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":"128739779","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
A wireless 8-channel ECG biopotential acquisition system for dry electrodes 一种用于干电极的无线8通道ECG生物电位采集系统
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401640
Xiaofei Pu, Lei Wan, Yun Sheng, P. Chiang, Yajie Qin, Zhiliang Hong
{"title":"A wireless 8-channel ECG biopotential acquisition system for dry electrodes","authors":"Xiaofei Pu, Lei Wan, Yun Sheng, P. Chiang, Yajie Qin, Zhiliang Hong","doi":"10.1109/RFIT.2012.6401640","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401640","url":null,"abstract":"A wireless 8-channel biopotential acquisition system for capturing electrocardiogram (ECG) using dry electrodes is presented. The ECG system consists of copper electrodes, a micropowered 8-channel custom ASIC, and an off-the-shelf microprocessor and bluetooth radio. Each analog channel of the custom ECG front-end is composed of a chopper-modulated instrumentation amplifier (CMIA) with chopping spike filter (CSF), a programmable gain amplifier (PGA), and a output buffer. Implemented in standard a 0.35 μm CMOS technology, the ECG front-end consumes 101 μA from a 2.7 V supply, occupying 5 mm2 of chip area. Measurement results show an input impedance of 1 G Ω, an input-referred noise of 0.97 μVrms (0.5 ~ 100 Hz), and a CMRR of 114 dB. Finally, a complete wireless 8-channel ECG monitoring system incorporating this analog front-end is demonstrated, showing successful recordings of a capture ECG waveform using a smart phone.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"62 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":"116908085","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: 15
Analytical modeling of surface-potential and drain current in AlGaAs/GaAs HEMT devices AlGaAs/GaAs HEMT器件表面电位和漏极电流的分析建模
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401654
S. Khandelwal, F. M. Yigletu, B. Iñíguez, T. Fjeldly
{"title":"Analytical modeling of surface-potential and drain current in AlGaAs/GaAs HEMT devices","authors":"S. Khandelwal, F. M. Yigletu, B. Iñíguez, T. Fjeldly","doi":"10.1109/RFIT.2012.6401654","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401654","url":null,"abstract":"We present an analytical calculation for the surface-potential and a surface-potential-based drain current model in AlGaAs/GaAs HEMT devices. We have developed a precise analytical calculation for the position of the Fermi level Ef in these devices from a consistent solution of Schrödinger's and Poisson's equations. The accuracy of our calculation is of the order of pico-volts. Ef is used to define the surface-potential ψ and subsequently derive the drain current Id. Real device effects like mobility degradation, velocity-saturation, channel-length modulation and self-heating are included in the model. The model is in excellent agreement with experimental data.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"59 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":"123939516","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: 4
Novel switch size control circuit in high efficiency hybrid mode DC-DC buck converter 新型高效混合模式DC-DC降压变换器开关尺寸控制电路
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401602
Yuan Bing, Lai Xin-quan, Shi Lingfeng
{"title":"Novel switch size control circuit in high efficiency hybrid mode DC-DC buck converter","authors":"Yuan Bing, Lai Xin-quan, Shi Lingfeng","doi":"10.1109/RFIT.2012.6401602","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401602","url":null,"abstract":"A switch size control circuit for hybrid mode DC-DC buck converter is presented. Detecting the output of error amplifier by a comparator, the circuit can select appropriate switch size according to load current for high efficiency. The threshold level of the comparator varies with respect to the amount of slope compensation, which maintains a substantially constant switch size changing point. A monolithic DC-DC buck converter with 5A load current using the proposed circuit has been fabricated with a 0.5μm CMOS process for validation. The switch size is 1/4 of the maximum value when load current is below 1A with 500mA hysteresis. The measured efficiency is up to 96%.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"37 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":"116647269","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 400-μW 3-GHz comparator in 65-nm CMOS 65纳米CMOS中400 μ w 3-GHz比较器
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401633
A. Huynh, B. Sedighi, H. T. Duong, H. V. Le, E. Skafidas
{"title":"A 400-μW 3-GHz comparator in 65-nm CMOS","authors":"A. Huynh, B. Sedighi, H. T. Duong, H. V. Le, E. Skafidas","doi":"10.1109/RFIT.2012.6401633","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401633","url":null,"abstract":"This paper presents a high-speed clocked regenerative comparator designed in 65-nm CMOS process. The kickback noise caused by large variations at the regeneration nodes is suppressed using an intermediate stage. An extra switch is added between regeneration nodes to further equate their voltages when the comparator is at reset phase. The measured results show that the proposed comparator is able to achieve a Bit Error Rate (BER) of 2 × 10-9 at a sensitivity of 12 mV at 1.4 GHz and 30 mV at 3 GHz. The power consumption of the proposed comparator is 75 μW at 500 MHz and 400 μW at 3 GHz.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"69 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":"116946490","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: 5
Design of a low power 5-GHz frequency synthesizer for WSN applications 无线传感器网络低功耗5ghz频率合成器的设计
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401669
Zhiqun Li, Q. Cao, Xiaodong Qi, Shuangshuang Zheng
{"title":"Design of a low power 5-GHz frequency synthesizer for WSN applications","authors":"Zhiqun Li, Q. Cao, Xiaodong Qi, Shuangshuang Zheng","doi":"10.1109/RFIT.2012.6401669","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401669","url":null,"abstract":"A fully integrated 5-GHz PLL frequency synthesizer for WSN applications has been designed and implemented in 0.18μm CMOS technology. With automatic current calibration technique (ACC), the VCO could maintain a good performance under a small current consumption of about 0.3mA. Phase switching technique is used in the frequency divider to reduce power consumption. Using a 1.8V supply voltage, the measured power consumption is 12mW and the phase noise is -111.13dBc/Hz at 1MHz offset.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"107 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":"123235849","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
A 4.89-GHz low-phase-noise VCO in CMOS technology 基于CMOS技术的4.89 ghz低相位噪声压控振荡器
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401659
Yutong Ying, Lu Huang, Li Cai, F. Lin
{"title":"A 4.89-GHz low-phase-noise VCO in CMOS technology","authors":"Yutong Ying, Lu Huang, Li Cai, F. Lin","doi":"10.1109/RFIT.2012.6401659","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401659","url":null,"abstract":"A 4.06-4.89 GHz, low phase noise symmetric complementary voltage controlled oscillator (VCO), which features an optimized capacitive feedback technique combined with RC source degeneration, is presented in this paper. Fabricated in 180nm CMOS technology, the proposed VCO obtained a measured corner frequency of 15-80 KHz. The measured phase noise at 1MHz offset from the 4.89GHz carrier is -119dBc/Hz. Occupying 0.15mm2 in 180nm CMOS technology under 2.5mW power consumption, an area-normalized figure-of-merit (FOMA) of 197.1dBc/Hz has been achieved.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"91 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":"123689443","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
Dual-mode bandpass filter with independently tunable center frequency and bandwidth 双模带通滤波器具有独立可调的中心频率和带宽
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401612
G. Chaudhary, P. Kim, Y. Jeong, Jongsik Lim
{"title":"Dual-mode bandpass filter with independently tunable center frequency and bandwidth","authors":"G. Chaudhary, P. Kim, Y. Jeong, Jongsik Lim","doi":"10.1109/RFIT.2012.6401612","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401612","url":null,"abstract":"This paper presents a compact dual-mode tunable bandpass filter (BPF) with independently tunable center frequencies and bandwidths based on varactor loaded transmission line dual-mode resonator. The center frequency can be controlled by tuning the even-mode and odd-mode resonant frequencies of the dual-mode resonator. The bandwidth of passband can be tuned by fixing the odd-mode and changing the even-mode resonant frequency. To validate the proposed structure, two-pole microstrip tunable BPF is presented and experimentally verified.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"17 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":"124855292","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: 1
Design of tunable negative group delay circuit for communication systems 通信系统中可调谐负群延迟电路的设计
2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI: 10.1109/RFIT.2012.6401613
Junhyung Jeong, Sungdoo Park, G. Chaudhary, Y. Jeong
{"title":"Design of tunable negative group delay circuit for communication systems","authors":"Junhyung Jeong, Sungdoo Park, G. Chaudhary, Y. Jeong","doi":"10.1109/RFIT.2012.6401613","DOIUrl":"https://doi.org/10.1109/RFIT.2012.6401613","url":null,"abstract":"In this paper, a design of tunable microstrip transmission line negative group delay circuit (NGDC) using p-i-n diodes is proposed. The design was based on reflective parallel R-L-C circuit and group delay (GD) can be varied with help of variable resistance. To get the variable resistance, the transmission line (TL) terminated with p-i-n diode is used. The GD is varied with help of bias voltages of p-i-n diodes. Both design equations and design procedures are presented. The measured GD time variation range is 0 ~ -20 ns and well agreed with simulation results.","PeriodicalId":187550,"journal":{"name":"2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"10 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":"123667185","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: 11
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