IEEE Transactions on Circuits and Systems - Part II: Express Briefs, Volume 59-II
Volume 59-II, Number 1, January 2012
- Chin-Fu Li, Shih-Chieh Chou, Guan-Hong Ke, Po-Chiun Huang:
A Power-Efficient Noise Suppression Technique Using Signal-Nulled Feedback for Low-Noise Wideband Amplifiers. 1-5 - Svetozar S. Broussev, Ivan S. Uzunov, Nikolay T. Tchamov:
Design Considerations in Tapped-Inductor Fourth-Order Dual-Band VCO. 6-10 - Tapio A. Lehtonen, Pekko Ruippo, Teppo Keitaanniemi, Nikolay T. Tchamov:
A Darlington-Enhanced CMOS Oscillator Architecture. 11-15 - Xianhe Huang, Yan Wang, Wei Fu:
Optimization and Realization of a 315-MHz Low-Phase-Noise Voltage-Controlled SAW Oscillator. 16-19 - Andrea Bevilacqua, Pietro Andreani:
Phase Noise Analysis of the Tuned-Input-Tuned-Output (TITO) Oscillator. 20-24 - Svetozar S. Broussev, Nikolay T. Tchamov:
Quality Factor Analysis for Cross-Coupled LC Oscillators Using a Time-Varying Root Locus. 25-29 - Yang Xu, Baoyong Chi, Xiaobao Yu, Nan Qi, Patrick Chiang, Zhihua Wang:
Power-Scalable, Complex Bandpass/Low-Pass Filter With I/Q Imbalance Calibration for a Multimode GNSS Receiver. 30-34 - Jun Yu, Meng Tong Tan, Wang Ling Goh, Stephen M. Cox:
A Dual-Feedforward Carrier-Modulated Second-Order Class-D Amplifier With Improved THD. 35-39 - Xin Ming, Qiang Li, Ze-kun Zhou, Bo Zhang:
An Ultrafast Adaptively Biased Capacitorless LDO With Dynamic Charging Control. 40-44 - Jia-Hui Wang, Chien-Hung Tsai, Sheng-Wen Lai:
A Low-Dropout Regulator With Tail Current Control for DPWM Clock Correction. 45-49 - Young-Jin Moon, Yong-Seong Roh, Jung-Chul Gong, Changsik Yoo:
Load-Independent Current Control Technique of a Single-Inductor Multiple-Output Switching DC-DC converter. 50-54 - Yingchieh Ho, Chiachi Chang, Chauchin Su:
Design of a Subthreshold-Supply Bootstrapped CMOS Inverter Based on an Active Leakage-Current Reduction Technique. 55-59 - Zaka Ullah Sheikh, Oscar Gustafsson:
Linear Programming Design of Coefficient Decimation FIR Filters. 60-64 - Shin-Chi Lai, Yi-Ping Yeh, Wen-Chieh Tseng, Sheau-Fang Lei:
Low-Cost and High-Accuracy Design of Fast Recursive MDCT/MDST/IMDCT/IMDST Algorithms and Their Realization. 65-69
Volume 59-II, Number 2, February 2012
- Young-Seok Park, Woo-Young Choi:
On-Chip Compensation of Ring VCO Oscillation Frequency Changes Due to Supply Noise and Process Variation. 73-77 - Ming Li, Rony E. Amaya:
Design of mM-W Fully Integrated CMOS Standing-Wave VCOs Using Low-Loss CPW Resonators. 78-82 - Jia-Ming Liu, Shih-Hsiung Chien, Tai-Haur Kuo:
Optimal Design for Delta-Sigma Modulators With Root Loci Inside Unit Circle. 83-87 - Yi-Da Wu, Kok-Choon Cheng, Chih-Cheng Lu, Hsin Chen:
Embedded Analog Nonvolatile Memory With Bidirectional and Linear Programmability. 88-92 - F. Xavier Moncunill-Geniz, Jordi Bonet-Dalmau, Pere Palà-Schönwälder, Francisco del Águìla López, M. Rosa Giralt-Mas:
A High-Resolution UWB IR Superregenerative Receiver Front End With an SRD Quench Shaper. 93-97 - Po-Chun Liu, Hsie-Chia Chang, Chen-Yi Lee:
A True Random-Based Differential Power Analysis Countermeasure Circuit for an AES Engine. 103-107 - Pierce Chuang, David Li, Manoj Sachdev:
A Low-Power High-Performance Single-Cycle Tree-Based 64-Bit Binary Comparator. 108-112 - Alfonso Fernández-Vázquez, Gordana Jovanovic-Dolecek:
Maximally Flat CIC Compensation Filter: Design and Multiplierless Implementation. 113-117 - Bodong Li, Xieping Gao, Fen Xiao:
A New Design Method of the Starting Block in Lattice Structure of Arbitrary-Length Linear Phase Paraunitary Filter Bank by Combining Two Polyphase Matrices. 118-122 - Wei Zhang, Housheng Su, Fanglai Zhu, Dong Yue:
A Note on Observers for Discrete-Time Lipschitz Nonlinear Systems. 123-127 - Pingping Chen, Lin Wang, Guanrong Chen:
DDCSK-Walsh Coding: A Reliable Chaotic Modulation-Based Transmission Technique. 128-132
Volume 59-II, Number 3, March 2012
- Chaitanya Mohan, Paul M. Furth:
A 16-Ώ Audio Amplifier With 93.8-mW Peak Load Power and 1.43-mW Quiescent Power Consumption. 133-137 - Marco Zamprogno, Alberto Minuti, Francesca Girardi, Pierangelo Confalonieri, Germano Nicollini:
A 10-b 100-kS/s 1-mW General-Purpose ADC for Cellular Telephones. 138-142 - Kwang-Chun Choi, Seung-Woo Lee, Bhum-Cheol Lee, Woo-Young Choi:
A Time-to-Digital Converter Based on a Multiphase Reference Clock and a Binary Counter With a Novel Sampling Error Corrector. 143-147 - Yi-Chieh Huang, Ping-Ying Wang, Shen-Iuan Liu:
An All-Digital Jitter Tolerance Measurement Technique for CDR Circuits. 148-152 - ZiJie Hu, Koen Mouthaan:
Design and Stability Analysis of a Low-Voltage Subharmonic Cascode FET Mixer. 153-157 - Wei Zhang, Zhe Jiang, Zhiyu Gao, Yanyan Liu:
An Efficient VLSI Architecture for Lifting-Based Discrete Wavelet Transform. 158-162 - Xinmiao Zhang, Jiangli Zhu, Wei Zhang:
Efficient Reencoder Architectures for Algebraic Soft-Decision Reed-Solomon Decoding. 163-167 - Fabio Frustaci, Pasquale Corsonello, Stefania Perri:
Analytical Delay Model Considering Variability Effects in Subthreshold Domain. 168-172 - Jong-Woo Kim, Joo-Seong Kim, Bai-Sun Kong:
Low-Voltage CMOS Differential Logic Style With Supply Voltage Approaching Device Threshold. 173-177 - Chih-Ting Yeh, Ming-Dou Ker:
New Design of 2 x VDD-Tolerant Power-Rail ESD Clamp Circuit for Mixed-Voltage I/O Buffers in 65-nm CMOS Technology. 178-182 - Shing-Chow Chan, Y. J. Chu:
A New State-Regularized QRRLS Algorithm With a Variable Forgetting Factor. 183-187 - Nattapol Sitthimahachaikul, Lakshmi P. Rao, Paul J. Hurst:
Canceling the ISI Due to Finite S/H Bandwidth in a Circular Buffer Forward Equalizer. 188-192
Volume 59-II, Number 4, April 2012
- Pei-Kang Tsai, Tzuen-Hsi Huang:
Integration of Current-Reused VCO and Frequency Tripler for 24-GHz Low-Power Phase-Locked Loop Applications. 199-203 - Longxing Shi, Chao Chen, Jianhui Wu, Meng Zhang:
A 1.5-V Current Mirror Double-Balanced Mixer With 10-dBm IIP3 and 9.5-dB Conversion Gain. 204-208 - Chang-Kyung Seong, Jinsoo Rhim, Woo-Young Choi:
A 10-Gb/s Adaptive Look-Ahead Decision Feedback Equalizer With an Eye-Opening Monitor. 209-213 - Marco Sosio, Antonio Liscidini, Rinaldo Castello:
A 2G/3G Cellular Analog Baseband Based on a Filtering ADC. 214-218 - Ramzi Darraji, Fadhel M. Ghannouchi:
RF/DSP Codesign Methodology of Enhanced Doherty Amplifiers. 219-223 - Zhisheng Li, Guy Torfs, Johan Bauwelinck, Xin Yin, Jan Vandewege, Christophe van Praet, Peter Spiessens, Huub Tubbax, Frederic Stubbe:
A 2.45-GHz +20-dBm Fast Switching Class-E Power Amplifier With 43% PAE and a 18-dB-Wide Power Range in 0.18-µm CMOS. 224-228 - Punith R. Surkanti, Paul M. Furth:
Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier. 229-233 - Brandon Rumberg, David W. Graham:
A Low-Power and High-Precision Programmable Analog Filter Bank. 234-238 - Longxing Shi, Wei Zhao, Jianhui Wu, Chao Chen:
Digital Background Calibration Techniques for Pipelined ADC Based on Comparator Dithering. 239-243 - Leonel Sousa, Samuel Antao:
MRC-Based RNS Reverse Converters for the Four-Moduli Sets 2n+1, 2n-1, 2n, 22n+1-1 and 2n+1, 2n-1, 22n, 22n+1-1. 244-248 - Andrea Calimera, Enrico Macii, Massimo Poncino:
Design Techniques for NBTI-Tolerant Power-Gating Architectures. 249-253
Volume 59-II, Number 5, May 2012
- Tai Nghia Nguyen, Jong-Wook Lee:
A K-band CMOS Differential Vackar VCO With the Gate Inductive Feedback. 257-261 - Qiong Zou, Kaixue Ma, Kiat Seng Yeo, Wei Meng Lim:
Design of a Ku-band Low-Phase-Noise VCO Using the Dual LC Tanks. 262-266 - I-Ting Lee, Hung-Yu Lu, Shen-Iuan Liu:
A 6-GHz All-Digital Fractional-N Frequency Synthesizer Using FIR-Embedded Noise Filtering Technique. 267-271 - Alper Ucar, Ediz Çetin, Izzet Kale:
A Continuous-Time Delta-Sigma Modulator for RF Subsampling Receivers. 272-276 - Sang Min Lee, Shahin Mehdizad Taleie, Ganesh R. Saripalli, Dongwon Seo:
Clock-Phase-Noise-Induced TX Leakage Estimation of a Baseband Wireless Transmitter DAC. 277-281 - Yunho Choi, Youngsu Kim, Huy Hoang, Franklin Bien:
A 3.1-4.8-GHz IR-UWB All-Digital Pulse Generator With Variable Channel Selection in 0.13-µm CMOS Technology. 282-286 - Jen-Wei Lee, Ju-Hung Hsiao, Hsie-Chia Chang, Chen-Yi Lee:
An Efficient DPA Countermeasure With Randomized Montgomery Operations for DF-ECC Processor. 287-291 - Shen-Fu Hsiao, Hou-Jen Ko, Chia-Sheng Wen:
Two-Level Hardware Function Evaluation Based on Correction of Normalized Piecewise Difference Functions. 292-296 - Doru-Florin Chiper:
Radix-2 Fast Algorithm for Computing Discrete Hartley Transform of Type III. 297-301 - Botond Sandor Kirei, Marius Neag, Marina Dana Topa:
Blind Frequency-Selective I/Q Mismatch Compensation Using Subband Processing. 302-306 - Hua Yang, Guo-Ping Jiang:
High-Efficiency Differential-Chaos-Shift-Keying Scheme for Chaos-Based Noncoherent Communication. 312-316 - Leonel Sousa, Samuel Antao:
Corrections to "MRC-Based RNS Reverse Converters for the Four-Moduli Sets 2n+1, 2n-1, 2n, 22n+1-1 and 2n+1, 2n-1, 22n, 22n+1-1". 317
Volume 59-II, Number 6, June 2012
- Janakan Sivasubramaniam, Hassan O. Elwan, Ali Ismail, Edward Youssoufian, Dzung Le, Mohammed Omar, Ahmed Emira:
A 70-mW ISDB-T Tuner for VHF and UHF Bands. 321-325 - Shayan Shahramian, Hemesh Yasotharan, Anthony Chan Carusone:
Decision Feedback Equalizer Architectures With Multiple Continuous-Time Infinite Impulse Response Filters. 326-330 - Xiao Pu, Ajay Kumar, Krishnaswamy Nagaraj:
Area-Efficient Low-Noise Low-Spur Architecture for an Analog PLL Working From a Low Frequency Reference. 331-335 - Jinho Han, Jaehyeok Yang, Hyeon-Min Bae:
Analysis of a Frequency Acquisition Technique With a Stochastic Reference Clock Generator. 336-340 - Ze-kun Zhou, Pei-Sheng Zhu, Yue Shi, Hui-ying Wang, Ying-qian Ma, Xiang-zhu Xu, Lin Tan, Xin Ming, Bo Zhang:
A CMOS Voltage Reference Based on Mutual Compensation of Vtn and Vtp. 341-345 - Xuan Zhang, Bojiong Ni, Ishita Mukhopadhyay, Alyssa B. Apsel:
Improving Absolute Accuracy of Integrated Resistors With Device Diversification. 346-350 - Po-Yu Kuo, Siwat Saibua, Guanming Huang, Dian Zhou:
An Efficient Method for Evaluating Analog Circuit Performance Bounds Under Process Variations. 351-355 - Edward N. Y. Ho, Philip K. T. Mok:
Wide-Loading-Range Fully Integrated LDR With a Power-Supply Ripple Injection Filter. 356-360 - Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya:
A 1-V-Input Switched-Capacitor Voltage Converter With Voltage-Reference-Free Pulse-Density Modulation. 361-365 - Håkan Johansson:
Fractional-Delay and Supersymmetric Mth-Band Linear-Phase FIR Filters Utilizing Partially Symmetric and Antisymmetric Impulse Responses. 366-370 - Yu-Chi Tsao, Ken Choi:
Area-Efficient VLSI Implementation for Parallel Linear-Phase FIR Digital Filters of Odd Length Based on Fast FIR Algorithm. 371-375 - Xinmiao Zhang, Yu Zheng:
Systematically Re-encoded Algebraic Soft-Decision Reed-Solomon Decoder. 376-380 - Kai He, Jin Sha, Zhongfeng Wang:
Nonbinary LDPC Code Decoder Architecture With Efficient Check Node Processing. 381-385
Volume 59-II, Number 7, July 2012
- Tai Nghia Nguyen, Jong-Wook Lee:
Ultralow-Power Ku-Band Dual-Feedback Armstrong VCO With a Wide Tuning Range. 394-398 - Prashant Dekate, William Redman-White, Domine Leenaerts, John R. Long:
Broad-Band Odd-Number CMOS Prescalers With Quadrature/Symmetrical Outputs. 399-403 - Tomislav Matic, Tomislav Svedek, Marijan Herceg:
A Method for the Schmitt-Trigger Propagation-Delay Compensation in Asynchronous Sigma-Delta Modulator. 404-408 - Hyouk-Kyu Cha, Woo-Tae Park, Minkyu Je:
A CMOS Rectifier With a Cross-Coupled Latched Comparator for Wireless Power Transfer in Biomedical Applications. 409-413 - Jinyong Jeon, Yong-Joon Jeon, Young-Suk Son, Gyu-Hyeong Cho:
A Direct Fast Feedback Current Driver Using an Inverting Amplifier for High-Quality AMOLED Displays. 414-418 - Leonard T. Bruton, Arjuna Madanayake, Chamith Wijenayake, Mona Maini:
Continuous-Time Analog Two-Dimensional IIR Beam Filters. 419-423 - Ching-Che Chung, Duo Sheng, Chia-Lin Chang, Wei-Da Ho, Yang-Di Lin, Fang-Nien Lu:
An All-Digital Large-N Audio Frequency Synthesizer for HDMI Applications. 424-428 - Ming-Hung Chang, Yi-Te Chiu, Wei Hwang:
Design and Iso-Area Vmin Analysis of 9T Subthreshold SRAM With Bit-Interleaving Scheme in 65-nm CMOS. 429-433 - Basant K. Mohanty, Anurag Mahajan, Pramod Kumar Meher:
Area- and Power-Efficient Architecture for High-Throughput Implementation of Lifting 2-D DWT. 434-438 - Felice Crupi, Massimo Alioto, Jacopo Franco, Paolo Magnone, M. Togo, N. Horiguchi, Guido Groeseneken:
Understanding the Basic Advantages of Bulk FinFETs for Sub- and Near-Threshold Logic Circuits From Device Measurements. 439-442 - Tao Li, Wei Xing Zheng:
New Stability Criterion for Fixed-Point State-Space Digital Filters With Generalized Overflow Arithmetic. 443-447 - Georges Kaddoum, François Gagnon:
Design of a High-Data-Rate Differential Chaos-Shift Keying System. 448-452 - Qiao Zhu, Guang-Da Hu, Yi-Xin Yin:
Lyapunov-Type Theorem of General Two-Dimensional Nonlinear Parameter-Varying FM Second Model. 453-457
Volume 59-II, Number 8, August 2012
- Behnam Sedighi, Johann-Christoph Scheytt:
Low-Power SiGe BiCMOS Transimpedance Amplifier for 25-GBaud Optical Links. 461-465 - Fei Yuan, Yushi Zhou:
A Phasor-Domain Study of Lock Range of Harmonic Oscillators With Multiple Injections. 466-470 - Timon Brückner, Matthias Lorenz, Christoph Zorn, Joachim Becker, Wolfgang Mathis, Maurits Ortmanns:
Hardware-Accelerated Simulation Environment for CT Sigma-Delta Modulators Using an FPGA. 471-475 - Tao Mai, Yannis P. Tsividis:
Internally Non-LTI Systems Based on Delays, With Application to Companding Signal Processors. 476-480 - Hyung-Min Lee, Maysam Ghovanloo:
An Adaptive Reconfigurable Active Voltage Doubler/Rectifier for Extended-Range Inductive Power Transmission. 481-485 - Chutham Sawigun, Andreas Demosthenous, Xiao Liu, Wouter A. Serdijn:
A Compact Rail-to-Rail Class-AB CMOS Buffer With Slew-Rate Enhancement. 486-490 - Young-Hoon Song, Samuel Palermo:
A 6-Gbit/s Hybrid Voltage-Mode Transmitter With Current-Mode Equalization in 90-nm CMOS. 491-495 - Sergio Decherchi, Paolo Gastaldo, Alessio Leoncini, Rodolfo Zunino:
Efficient Digital Implementation of Extreme Learning Machines for Classification. 496-500 - Roberto Gutierrez, Vicente Torres-Carot, Javier Valls:
Hardware Architecture of a Gaussian Noise Generator Based on the Inversion Method. 501-505 - Muhammad Bilal, Shahid Masud, Shahrukh Athar:
FPGA Design for Statistics-Inspired Approximate Sum-of-Squared-Error Computation in Multimedia Applications. 506-510 - Shin-Chi Lai, Yi-Ping Yeh, Sheau-Fang Lei:
Corrections to 'Area- and Power-Efficient Design of Daubechies Wavelet Transforms Using Folded AIQ Mapping'. 511-514 - Wu-Hua Chen, Zipeng Wang, Xiaomei Lu:
On Sampled-Data Control for Master-Slave Synchronization of Chaotic Lur'e Systems. 515-519 - Veaceslav Spinu, Nikolaos Athanasopoulos, Mircea Lazar, Georges Bitsoris:
Stabilization of Bilinear Power Converters by Affine State Feedback Under Input and State Constraints. 520-524 - Ping Zhou, Tianyou Chai, Jin-Hui Zhao:
DOB Design for Nonminimum-Phase Delay Systems and Its Application in Multivariable MPC Control. 525-529
Volume 59-II, Number 9, September 2012
- Mahmut E. Sinangil, Marcus Yip, Masood Qazi, Rahul Rithe, Joyce Kwong, Anantha P. Chandrakasan:
Design of Low-Voltage Digital Building Blocks and ADCs for Energy-Efficient Systems. 533-537 - Man Keun Kang, Tae Wook Kim:
CMOS IR-UWB Receiver for ±9.7-mm Range Finding in a Multipath Environment. 538-542 - Hong Gul Han, Tae Wook Kim:
A CMOS RF Programmable-Gain Amplifier for Digital TV With a +9-dBm IIP3 Cross-Coupled Common-Gate LNA. 543-547 - Amany El-Gouhary, Nathan M. Neihart:
Inductor-Based Tuning in LC-Quadrature Oscillators: A Comparative Study. 548-552 - Wang-Soo Kim, Chang-Kyung Seong, Woo-Young Choi:
A 5.4-Gbit/s Adaptive Continuous-Time Linear Equalizer Using Asynchronous Undersampling Histograms. 553-557 - Naga Sasidhar, David Gubbins, Pavan Kumar Hanumolu, Un-Ku Moon:
Rail-to-Rail Input Pipelined ADC Incorporating Multistage Signal Mapping. 558-562 - Henry Park, Chih-Kong Ken Yang:
Nearly Exact Analytical Formulation of the DNL Yield of the Digital-to-Analog Converter. 563-567 - Golam Chowdhury, A. Hassibi:
An On-Chip Temperature Sensor With a Self-Discharging Diode in 32-nm SOI CMOS. 568-572 - Wei Zhao, Kwangsik Choi, Scott Bauman, Zeynep Dilli, Thomas Salter, Martin Peckerar:
A Radio-Frequency Energy Harvesting Scheme for Use in Low-Power Ad Hoc Distributed Networks. 573-577 - I. Made Darmayuda, Yuan Gao, Meng Tong Tan, San-Jeow Cheng, Yuanjin Zheng, Minkyu Je, Chun-Huat Heng:
A Self-Powered Power Conditioning IC for Piezoelectric Energy Harvesting From Short-Duration Vibrations. 578-582 - Pedro Reviriego, Oscar Ruano, Juan Antonio Maestro:
Implementing Concurrent Error Detection in Infinite-Impulse-Response Filters. 583-586 - Woojin Rim, Woong Choi, Jongsun Park:
Adaptive Clock Generation Technique for Variation-Aware Subthreshold Logics. 587-591 - Chao Gu, Jiaxiang Zhao, Wei Xu, Dongyan Sun:
Design of Linear-Phase Notch Filters Based on the OMP Scheme and the Chebyshev Window. 592-596 - Zbigniew Galias, Xinghuo Yu:
Dynamical Behaviors of Discretized Second-Order Terminal Sliding-Mode Control Systems. 597-601 - Liping Chen, Yi Chai, Ranchao Wu, Jing Yang:
Stability and Stabilization of a Class of Nonlinear Fractional-Order Systems With Caputo Derivative. 602-606 - Zdenek Biolek, Dalibor Biolek, Viera Biolková:
Computation of the Area of Memristor Pinched Hysteresis Loop. 607-611
Volume 59-II, Number 10, 2012
- Pieter A. J. Nuyts, Brecht François, Wim Dehaene, Patrick Reynaert:
A CMOS Burst-Mode Transmitter With Watt-Level RF PA and Flexible Fully Digital Front-End. 613-617 - Tomasz Podsiadlik, John Dooley, Ronan Farrell:
Improved Coding-Efficiency Two-Level Source Encoder for RF Switch-Mode Power Amplifiers. 618-622 - Chi-Hsien Lin, Hong-Yeh Chang:
A Low-Phase-Noise CMOS Quadrature Voltage-Controlled Oscillator Using a Self-Injection-Coupled Technique. 623-627 - Salvatore Levantino, Paolo Maffezzoni, Federico Pepe, Andrea Bonfanti, Carlo Samori, Andrea L. Lacaita:
Efficient Calculation of the Impulse Sensitivity Function in Oscillators. 628-632 - Gennady A. Leonov, Nikolay V. Kuznetsov, Marat V. Yuldashev, Renat V. Yuldashev:
Analytical Method for Computation of Phase-Detector Characteristic. 633-637 - Michele Bonnin, Fernando Corinto, Marco Gilli:
Phase Space Decomposition for Phase Noise and Synchronization Analysis of Planar Nonlinear Oscillators. 638-642 - María de Rodanas Valero Bernal, Santiago Celma, Nicolás J. Medrano-Marqués, Belén Calvo:
An Ultralow-Power Low-Voltage Class-AB Fully Differential OpAmp for Long-Life Autonomous Portable Equipment. 643-647 - Aliakbar Ghadiri, Kambiz K. Moez:
Bandwidth Enhancement of On-Chip Transformers Using Negative Capacitance. 648-652