IEEE Solid-State Circuits Letters – Journals

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A Ka-Band Mutual Coupling Resilient Stacked-FET Power Amplifier With 21.2 dBm OP1dB and 27.6% PAE1dB in 45-nm CMOS SOI
A Ka-Band Mutual Coupling Resilient Stacked-FET Power Amplifier With 21.2 dBm OP1dB and 27.6% PAE1dB in 45-nm CMOS SOI 150 150
Author(s): Jian Zhang, Dawei Wang, Wei Zhu, Ming Zhai, Xiangjie Yi, Yan Wang

Abstract:

This letter presents a Ka-band mutual coupling resilient stacked-FET power amplifier (PA) in 45-nm CMOS silicon on insulator. Two sub-PAs with triple-stacked-FET to increase output-power (Pout) are combined through a quadrature hybrid coupler to keep robust and high performance in the scenario of mutual coupling among the phased-array antennas. A …

Published in: IEEE Solid-State Circuits Letters
Page(s): 147 – 150
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3386676
Publisher: IEEE

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248-GHz Subharmonic Mixer Last Transmitter With I/Q Imbalance and LO Feedthrough Calibration
248-GHz Subharmonic Mixer Last Transmitter With I/Q Imbalance and LO Feedthrough Calibration 150 150
Author(s): Seunghoon Lee, Junhyeong Kim, Kangseop Lee, Ho-Jin Song

Abstract:

This letter presents a 248 GHz compact direct-conversion transmitter with IQ and LO feedthrough (LOFT) calibration capability, which can achieve a data rate of 20-Gb/s with 16-QAM. The transmitter design incorporates a subharmonic double-balanced mixer configuration, simplifying the complexity of the local oscillator (LO) chain. Furthermore, a Wilkinson power divider …

Published in: IEEE Solid-State Circuits Letters
Page(s): 159 – 162
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3387285
Publisher: IEEE

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GaN Power Switch for Power Distribution Protection
GaN Power Switch for Power Distribution Protection 150 150
Author(s): Ronald Hassib Galvis Chacón, José Alexandre Diniz, Saulo Finco

Abstract:

The electrical power system (EPS) of satellites requires protection devices to isolate failures in short-circuit conditions that can occur in payloads due to various sources, such as debris, mishandling, or radiation. Latching current limiter (LCL) implemented with a pMOS power transistor is typically used for this task. Radiation can also …

Published in: IEEE Solid-State Circuits Letters
Page(s): 155 – 158
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3386870
Publisher: IEEE

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A Fully Integrated Digital LDO With Adaptive Sampling and Statistical Comparator Selection
A Fully Integrated Digital LDO With Adaptive Sampling and Statistical Comparator Selection 150 150
Author(s): Shun Yamaguchi, Takashi Hisakado, Osami Wada, Mahfuzul Islam

Abstract:

Digital LDOs are gaining attention for their operation with small output capacitance. Adaptive sampling with a large frequency scaling ratio is required for fast transient response with low-power operation. Furthermore, the design of a fluctuation detector to deal with large load steps is important. This letter describes an adaptive-sampling digital …

Published in: IEEE Solid-State Circuits Letters
Page(s): 163 – 166
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3385233
Publisher: IEEE

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A Subthreshold Time-Domain Analog Spiking Neuron With PLL-Based Leak Circuit and Capacitive DAC Synapse
A Subthreshold Time-Domain Analog Spiking Neuron With PLL-Based Leak Circuit and Capacitive DAC Synapse 150 150
Author(s): Taylor Barton, Shea Smith, Yu Hao, Ryan Watson, Kyle Rogers, Parker Allred, Bibhu Datta Sahoo, Nancy Fulda, Jordan T. Yorgason, Karl F. Warnick, Mau-Chung Frank Chang, Yen-Cheng Kuan, Shiuh-Hua Wood Chiang

Abstract:

The design and measurement of a time-domain analog spiking neuron is described. The proposed neuron leverages time-domain processing using voltage-controlled oscillators (VCOs) and a time-domain comparator to integrate the input spike and trigger the output spike. A novel leaky circuit uses a phase-locked loop (PLL) to drive the phase difference …

Published in: IEEE Solid-State Circuits Letters
Page(s): 143 – 146
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3384762
Publisher: IEEE

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Design and Stability Analysis of the Variable-Sawtooth-Based PWM Controller for the AC-Coupled Envelope Tracking Supply Modulator
Design and Stability Analysis of the Variable-Sawtooth-Based PWM Controller for the AC-Coupled Envelope Tracking Supply Modulator 150 150
Author(s): Peng Xu, Tao Wang, Xueli Zhang, Peng Cao, Jiawei Xu, Zhiliang Hong

Abstract:

This letter analyzes the proposed variable-sawtooth-based PWM controller for the ac-coupled envelope tracking (ET) supply modulator (SM). The ET SM includes a linear amplifier and a switching power modulator (SPM). The SPM maintains the voltage across the ac-coupling capacitor and provides an output current in a power-efficient manner. A 10-MHz …

Published in: IEEE Solid-State Circuits Letters
Page(s): 151 – 154
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3384345
Publisher: IEEE

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A 23.9-μW 13.6-Bit Period Modulation-Based Capacitance-to-Digital Converter With Dynamic Current Mirror Front-End
A 23.9-μW 13.6-Bit Period Modulation-Based Capacitance-to-Digital Converter With Dynamic Current Mirror Front-End 150 150
Author(s): Hyeyeon Lee, Donguk Seo, Young-Jin Woo, Yoonmyung Lee, Inhee Lee, Youngcheol Chae

Abstract:

This letter proposes a low-power high-precision capacitance-to-digital converter (CDC) utilizing a dynamic current mirror (DCM) to transform a sensor input capacitance $(C_{\mathrm{ IN}})$ into an output current. The resulting current is directly proportional to the ratio of $C_{\mathrm{ IN}}$ to an internal reference capacitor $(C_{\mathrm {REF}})$ and …

Published in: IEEE Solid-State Circuits Letters
Page(s): 135 – 138
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3382813
Publisher: IEEE

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A Compact Phase-Domain Delta–Sigma Time-to-Digital Converter With 8.5-ps Resolution for LiDAR Applications
A Compact Phase-Domain Delta–Sigma Time-to-Digital Converter With 8.5-ps Resolution for LiDAR Applications 150 150
Author(s): Yoondeok Na, Myung-Jae Lee, Youngcheol Chae

Abstract:

This letter introduces a compact, high-resolution time-to-digital converter (TDC) for lidar applications. In contrast to a conventional histogram-based peak detection method, this letter proposes a mean detection method using a highly digitized phase-domain delta–sigma (PD $\Delta \Sigma$ ) TDC. The proposed TDC operates in an incremental $\Delta \Sigma $ manner for …

Published in: IEEE Solid-State Circuits Letters
Page(s): 127 – 130
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3382594
Publisher: IEEE

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A 50–67-GHz Transformer-Based Six-Port Balanced-to-Unbalanced Quadrature Hybrid Coupler
A 50–67-GHz Transformer-Based Six-Port Balanced-to-Unbalanced Quadrature Hybrid Coupler 150 150
Author(s): Yang Gao, Howard C. Luong

Abstract:

This letter presents the first on-chip transformer-based six-port balanced-to-unbalanced quadrature hybrid coupler (QHBC). The proposed six-port QHBC employs three transformers to replace eight inductors design in conventional LC-based couplers for miniaturization. Fabricated in CMOS 28 nm, the overall size of the proposed coupler is 0.23 mm $\times0.17$ mm, which is equivalent to $0.046\…

Published in: IEEE Solid-State Circuits Letters
Page(s): 139 – 142
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3381811
Publisher: IEEE

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