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International Conference on Microwave and Millimeter Wave technology Proceedings

作者： Zhao Yingdong Zhang Kai Yang Fei School of Electronic Science & Engineering Southeast University Science and Technology on Monolithic Integrated Circuits and Modules Laboratory

A 4th-order subharmonic downconversion mixer with a radio frequency (RF) of 480 GHz and intermediate frequency (IF) of 20 GHz that employs MOS symmetric varactors (SVARs) is demonstrated in 65-nm CMOS. The mixer achieves the minimum conversion loss of 25 dB at 20 GHz, VG = 0.5 V and VNW = 1 V. The return loss of the output port can reach nearly 30 dB, achieving a good matching effect, and can operate at a LO power of 9 dBm. The 4-GHz IF bandwidth spans between 18 and 22 GHz.

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Design of 40-67GHz Broadband Low Noise Amplifier MMIC

Design of 40-67GHz Broadband Low Noise Amplifier MMIC

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International Conference on Microwave and Millimeter Wave technology Proceedings

作者： Fan Yang WeiBo Wang YongPing Peng Zhongfei Chen Fangjin Guo Yan Chen Nanjing Electronic Device Institute China Science and Technology on Monolithic Integrated and Modules Laboratory Nanjing China

As a front-end signal processor in the receiver, the low noise amplifier has a crucial impact on the performance of the entire signal link. In this paper, a 40-67GHz broadband low noise amplifier MMIC is designed by 0.1μm InP HEMT process. The measured results show that the gain of the MMIC achieves 27dB with a gain flatness less than ±1dB in the full band. Both the input and output return losses are better than 10dB. At the same time, the typical value of the output 1dB compression point Po(1dB) is 0.5dBm and the representative noise figure is 2.2dB. The MMIC area is 2.4mm*1.1mm. Good performance can be achieved in the target frequency band.

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RF characterization of InP double heterojunction bipolar transistors on a flexible substrate under bending conditions

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Journal of Semiconductors 2022年第9期43卷 64-67页

作者： Lishu Wu Jiayun Dai Yuechan Kong Tangsheng Chen Tong Zhang Joint International Research Laboratory of Information Display and Visualization School of Electronic Science and EngineeringSoutheast UniversityNanjing 210096China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices InstituteNanjing 210016China Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of EducationSchool of Instrument Science and EngineeringSoutheast UniversityNanjing 210096China

This letter presents the fabrication of InP double heterojunction bipolar transistors(DHBTs)on a 3-inch flexible substrate with various thickness values of the benzocyclobutene(BCB)adhesive bonding layer,the corresponding thermal resistance of the InP DHBT on flexible substrate is also measured and *** DHBT on a flexible substrate with 100 nm BCB obtains cut-off frequency f_(T)=358 GHz and maximum oscillation frequency f_(MAX)=530 ***,the frequency performance of the InP DHBT on flexible substrates at different bending radii are *** is shown that the bending strain has little effect on the frequency characteristics(less than 8.5%),and these bending tests prove that InP DHBT has feasible flexibility.

关键词： InP DHBT thermal resistance radio frequency bending

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Reliable and broad-range layer identification of Au-assisted exfoliated large area MoS_(2)and WS_(2)using reflection spectroscopic fingerprints

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Nano Research 2022年第9期15卷 8470-8478页

作者： Bo Zou Yu Zhou Yan Zhou Yanyan Wu Yang He Xiaonan Wang Jinfeng Yang Lianghui Zhang Yuxiang Chen Shi Zhou Huaixin Guo Huarui Sun School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System Harbin Institute of Technology ShenzhenShenzhen 518055China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China University of Science and Technology of China Hefei 230026China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices InstituteNanjing 210016China

The emerging Au-assisted exfoliation technique enables the production of a wealth of large-area and high-quality ultrathin two dimensional(2D)***,damage-free,and reliable determination of the layer number of such 2D films can greatly promote layer-dependent physical studies and device ***,an optical method has been developed for simple,high throughput,and accurate determination of the layer number for Au-assisted exfoliated MoS_(2)and WS_(2)films in a broad thickness *** method is based on quantitative analysis of layer-dependent white light reflection spectra(WLRS),revealing that the intensity of exciton-induced reflection peaks can be used as a clear indicator for identifying the layer *** simple yet robust method will facilitate fundamental studies on layer-dependent optical,electrical,and thermal properties and device applications of 2D *** technique can also be readily combined with photoluminescence(PL)and Raman spectroscopies to study other layer-dependent physical properties of 2D materials.

关键词： Au-assisted exfoliation MoS_(2)and WS_(2) layer identification white light reflection spectra excitonic peaks

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A 2-18 GHz 6-Bit GaAs Positive Voltage Driven Digitally Controlled Attenuator for Phased Array

A 2-18 GHz 6-Bit GaAs Positive Voltage Driven Digitally Cont...

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International Symposium on Antennas and Propagation (ISAP)

作者： Liwei Yan Shuang Peng Kai Zhang Ziqiang Wang Chenxi Liu Fei Yang State Key Laboratory of Millimeter Wves Southeast University Nanjing China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing China

In this paper, an ultra-wideband 6-bit digitally controlled attenuator MMIC for the active phased array that integrates positive voltage digital driving circuits was developed, utilizing GaAs enhanced and depletion mode p-HEMT process. The attenuator design operates in an ultra-wide bandwidth of 2-18 GHz, with a dynamic attenuation range of 0.5-31.5 dB and an attenuation accuracy of less than 0.9 dB over the entire frequency band. The integrated DCFL (direct coupling field effect transistor logic) inverter circuit on the chip enables direct control of the attenuator with a positive voltage while occupying a chip area of only 2.7 mm 2 .

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A 100MS/s Pipeline ADC Without Calibration in 0.18μm CMOS technology 14

A 100MS/s Pipeline ADC Without Calibration in 0.18μm CMOS T...

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14th International Conference on Microwave and Millimeter Wave technology, ICMMT 2022

作者： Zhang, Yi Liu, Yaqin Xia, Hongliang Yang, Lei Wang, Yang Zhang, Youtao Guo, Yufeng College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Nanjing China National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology Nanjing China State Key Laboratory of Millimeter Waves Nanjing China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing China Nanjing GuoBo Electronics Co. Ltd Nanjing China Nanjing Vocational University of Industry Technology Nanjing China

ISBN: (纸本)9781665467520

Based on SMIC 180nm CMOS process and 1.8/3.3V power supply voltage, a high-speed pipeline ADC is designed in this paper. After a comprehensive consideration of conversion rate and accuracy, the pipelined architecture is finally determined to be 3.5b3+5b. The redundant calibration technology is adopted between each stage to reduce the influence of comparator offset on ADC accuracy. To reduce power consumption and area, SHA-less sampling is adopted. The traditional bootstrap switch is improved to dynamically change the substrate potential so as to reduce the influence of leakage in SHA-less sampling circuit. The post-simulation results shows that the high-speed pipeline ADC designed in this paper can reach 9.97-bit ENOB and 67.76 dB SFDR under the sampling frequency of 100MS/s and input signal frequency of Nyquist, the overall power consumption is about 390mW, and the overall area of the layout is 4.56mm2. © 2022 IEEE.

关键词： Electric power utilization

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A High-Speed Level Shifter with dVs/dt Noise Immunity Enhancement Structure for 200V monolithic GaN Power IC 35

A High-Speed Level Shifter with dVs/dt Noise Immunity Enhanc...

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35th International Symposium on Power Semiconductor Devices and ICs, ISPSD 2023

作者： Zheng, Yifei Yuan, Qing Song, Deyuan Ying, Yutao Zhu, Jing Sun, Weifeng Zhang, Long Li, Sheng Wang, Denggui Zhou, Jianjun Zhang, Sen He, Nailong National Asic System Engineering Research Center Southeast University Nanjing210096 China Nanjing Electronic Devices Institute Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing210016 China Wuxi Chipown Micro-electronics Limited Wuxi China Csmc Technologies Corporation Technology Development Department Wuxi China

ISBN: (纸本)9798350396829

monolithic integration has been demonstrated to be an ideal solution to minimize the parasitics in GaN power IC. Nonetheless, the current commercially GaN process for power IC is far less mature and only n-type HEMTs are available. Therefore, it is difficult for high voltage level shifters to achieve high speed. This work implements a level shifter for GaN IC to achieve both small response time and high d VSdt noise immunity without complicated signal processing circuits, thus delay and conduction loss will be minimized. The proposed circuit was fabricated in a $1μm GaN-on-Silicon process and measured results were performed to verify the characteristics. © 2023 IEEE.

关键词： Gallium nitride

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Modeling Techniques for MHEMT Devices up to 110GHz 13

Modeling Techniques for MHEMT Devices up to 110GHz

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13th International Conference on Microwave and Millimeter Wave technology, ICMMT 2021

作者： Lu, Haiyan Wu, Shaobin Chen, Jixin Chen, Tangsheng Science And Technology On Monolithic Integrated Circuits And Modules Laboratory Nanjing China Southeast University China Nanjing Electronic Devices Institute China

ISBN: (纸本)9781665434379

This paper mainly introduces a method to build a nonlinear model of MHEMT, mainly to solve the problem of short channel effect of MHEMT. In order to accurately characterize the active devices below 110GHz, a LRRM calibration kit was designed to be implemented on the same substrate as the devices. According to the improved Angelov model method, the equivalent circuit of MHEMT device is extracted. Excellent agreements between measured and simulated data are obtained in the frequency up to 110 GHz. © 2021 IEEE.

关键词： Equivalent circuits

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Design of a RF Doherty Power Amplifier Based on Handset Application

Design of a RF Doherty Power Amplifier Based on Handset Appl...

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International Conference on Microwave and Millimeter Wave technology Proceedings

作者： Yujie Tang Yingjie Zhou Hao Zhou Lei Yang Yuan Zheng Yufeng Guo Yi Zhang College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Nanjing China Nanjing GuoBo Electronics Co. Ltd Nanjing China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing China State Key Laboratory of Millimeter Waves Nanjing China

A Doherty Power Amplifier (PA) with high efficiency and high linearity that can be used in smart communication devices such as mobile phones in the sub-6GHz frequency band is proposed. This Doherty PA uses the InGaP/GaAs hetero-junction bipolar transistor (HBT) process. Compared with the traditional Doherty PA, the PA in this paper combines the choke inductance of the output collector and the phase compensation circuit with the output circuit of the Doherty PA respectively, which reduces the number of components required for matching. From the simulation, when the power supply voltage of the Doherty power amplifier is 4.2V, the operating frequency is 3.5GHz and the output power is 26.5dBm, the power added efficiency (PAE) reaches 34.5%, at the same time when using a 10MHz bandwidth LTE-3GPPFDD modulated signal the Adjacent Channel Power Ratio (ACPR) below to -35dBc.

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Blind Calibration Algorithm for Time-interleaved Analog-to-Digital Conversion System

Blind Calibration Algorithm for Time-interleaved Analog-to-D...

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International Conference on Microwave and Millimeter Wave technology Proceedings

作者： Ziqian Jiang Jie Xu Xiaopeng Li Youtao Zhang Changchun Zhang Yufeng Guo Yi Zhang College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Nanjing China Nanjing GuoBo Electronics Co. Ltd Nanjing China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing China State Key Laboratory of Millimeter Waves Nanjing China

This paper presents a blind calibration algorithm for a multi-channel time-interleaved analog-to-digital conversion system implemented in MATLAB/simulink. The behavior level simulation of the calibration system is carried out. The simulation results show that the signal-to-noise ratio (SNR), signal-to-noise-distortion ratio(SNDR), and spurious-free dynamic range (SFDR) of the signal corrected by the calibration system are greatly improved, which lays a solid foundation for the subsequent digital circuit design. Behavioral simulations are presented for a 4-channel 10-bit TI-ADC in order to verify the effectiveness of the proposed method. Using the introduced calibration technique, SFDR increased by 33 dB on average.

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