IEEE Solid-State Circuits Letters

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A D-Band Wideband Single-Ended Neutralized Up-Conversion Mixer with Controlled LO Feedthrough in 65nm CMOS

A D-Band Wideband Single-Ended Neutralized Up-Conversion Mixer with Controlled LO Feedthrough in 65nm CMOS 150 150
Author(s): Chun Wang, Chenxin Liu, Hans Herdian, Abanob Shehata, Jill Mayeda, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada

Abstract:

A D-band wideband passive single-ended up-conversion mixer with controlled LO feedthrough in 65nm CMOS process is presented in this letter. The LO feedthrough was controlled by the varactor and the neutralizing transmission line between the LO and RF ports of the mixer. In measurement, the proposed passive single-ended mixer had …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3393973
Publisher: IEEE

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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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