Capacitors

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A 550 μW Capacitor-Assisted Transformer-Based VCO Achieving 204 dBc/Hz FoMA at 1MHz Frequency Offset

A 550 μW Capacitor-Assisted Transformer-Based VCO Achieving 204 dBc/Hz FoMA at 1MHz Frequency Offset 150 150
Author(s): Teng-Shen Yang, Liang-Hung Lu

Abstract:

This letter presents a capacitor-assisted transformer-based voltage-controlled oscillator (VCO) that achieves a low flicker-noise corner with sub-milliwatt power consumption and compact chip area. By introducing a small assisting capacitor into the transformer, the higher-order tank impedance is reshaped from the second-resonance region toward the third-resonance region, resulting in a more …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3690818
Publisher: IEEE

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HyFPCiM: A 65-nm 417-μW Error-Sensitivity-Aware FP8 Compute-in-Memory Macro

HyFPCiM: A 65-nm 417-μW Error-Sensitivity-Aware FP8 Compute-in-Memory Macro 150 150
Author(s): K Gaurav Kumar, Yatharth Agarwal, Kaushik Roy

Abstract:

This letter presents HyFPCiM, a 65-nm FP8 compute-in-memory (CiM) macro that enables sub-mW floating-point (FP) inference using error-sensitivity-aware FP partitioning (EAP). EAP maps exponent processing to a digital CiM (DCiM) path and mantissa accumulation to an analog CiM (ACiM), avoiding the power- and area-intensive adder-tree-based accumulation used in prior FP-CiM …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3688988
Publisher: IEEE

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A 6.8–14-GHz Ring-Based Sampling-PLL Achieving 69.3-fs Jitter Under 50-mV Supply Noise

A 6.8–14-GHz Ring-Based Sampling-PLL Achieving 69.3-fs Jitter Under 50-mV Supply Noise 150 150
Author(s): Mahmoud A. Khalil, Mohamed Badr Younis, Ruhao Xia, Ahmed E. Abdelrahman, Tianyu Wang, Kyu-Sang Park, Pavan Kumar Hanumolu

Abstract:

This article presents a type-III wide-bandwidth ring-oscillator-based analog phase-locked loop (PLL) optimized for low-jitter performance in noisy supply environments. The design uses an 812.5-MHz reference frequency and a high-gain sampling phase detector to achieve a closed-loop bandwidth over 100 MHz, effectively reducing the intrinsic phase noise of the ring oscillator. To …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 13
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3683111
Publisher: IEEE

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A 10.1-ENOB 8kHz Bandwidth 95–250nW PVT-Robust DT Level-Crossing ADC for Sparse and Generic Signals

A 10.1-ENOB 8kHz Bandwidth 95–250nW PVT-Robust DT Level-Crossing ADC for Sparse and Generic Signals 150 150
Author(s): Jixuan Mou, Pieter Harpe, Alessandro Saccon, Eugenio Cantatore, Marco Fattori

Abstract:

This article presents an event-driven discrete-time level crossing analog-to-digital converter (DT-LCADC) that is energy-efficient in converting both sparse and generic signals and is robust against process voltage and temperature (PVT) variations. The proposed DT-LCADC uses the comparator delay to classify each level-crossing event as slow (produced by a small input …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 12
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3683078
Publisher: IEEE

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A 28-nm System-in-One-Macro Computing-in-Memory Chip Utilizing Leakage-Eliminated 2T1C and Capacitor-Over-Logic 1T1C eDRAM

A 28-nm System-in-One-Macro Computing-in-Memory Chip Utilizing Leakage-Eliminated 2T1C and Capacitor-Over-Logic 1T1C eDRAM 150 150
Author(s): Zhihang Qian, Zhaori Cong, Shengzhe Yan, Zeyu Guo, Zhuoyu Dai, Yifan He, Wenyu Sun, Chunmeng Dou, Feng Zhang, Di Geng, Jinshan Yue, Yongpan Liu, Qi Liu, Ming Liu

Abstract:

Computing-in-memory (CIM) is a promising paradigm for energy- and area-efficient implementation of the heavy general matrix multiplication (GEMM) operations, especially in the evolving deep learning algorithms. Though existing CIM macros have demonstrated remarkable energy/area efficiency, the corresponding metrics of the system-level CIM chips degrade due to the peripheral components, …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 15
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3684971
Publisher: IEEE

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A MEMS-Free 4096-Pixel CMOS E-Nose Array With MOF-Based Molecular Selectivity, In-Pixel Thermal Regeneration, and a Compact Single-Coefficient Bandpass Sigma–Delta ADC

A MEMS-Free 4096-Pixel CMOS E-Nose Array With MOF-Based Molecular Selectivity, In-Pixel Thermal Regeneration, and a Compact Single-Coefficient Bandpass Sigma–Delta ADC 150 150
Author(s): Marco Saif, Adam Y. Wang, Shao-Wei Lo, Fuze Jiang, Zhikai Huang, Jiachen Wang, Hangxing Liu, Chih-Jen Shih, Thomas Burger, Hua Wang

Abstract:

This work presents a CMOS-only [micro-electromechanical systems (MEMS)-free] electronic nose (e-nose) for concurrent multi-gas-sensing applications. The proposed system integrates 4096 capacitance-to-digital converter (CDC) pixels, each implementing a compact bandpass sigma–delta ( $\Sigma \Delta $ ) ADC with a single feedback coefficient and no additional feedforward or feedback paths, achieving each pixel footprint …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 13
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3685410
Publisher: IEEE

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A 40k-Pixel Multimodal Biophysiology Monitoring Platform With 10k Concurrent Electrophysiology Channels and a Mixer-Embedded ΣΔ Impedance Sensor

A 40k-Pixel Multimodal Biophysiology Monitoring Platform With 10k Concurrent Electrophysiology Channels and a Mixer-Embedded ΣΔ Impedance Sensor 150 150
Author(s): Hangxing Liu, Fuze Jiang, Jingjing Zang, Marco Saif, Thomas Burger, Stephan C. F. Neuhauss, Hua Wang

Abstract:

Understanding complex physiological processes requires the ability to monitor multiple biological modalities concurrently, as electrical, ionic, and biochemical processes are tightly coupled and cannot be holistically described by single-mode sensors. This article presents a 40 nm CMOS multimodal cellular physiology monitoring platform that integrates 40 960 reconfigurable pixels at $10.8~\mu $ m pixel pitch. …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 12
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3684715
Publisher: IEEE

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An 18.3-μW 108.3-dB DR Discrete-Time Delta-Sigma Modulator Using a Loop Filter Auto-Shift Technique

An 18.3-μW 108.3-dB DR Discrete-Time Delta-Sigma Modulator Using a Loop Filter Auto-Shift Technique 150 150
Author(s): Cong Wei, Ziqiang Peng, Lijie Huang, Jinze Lai, Rongshan Wei, Xiaoqiang Lu, Zhichao Tan

Abstract:

This article presents a discrete-time, third-order, single-loop, 17-level delta-sigma modulator (DSM) for high-dynamic-range sensor measurement applications, which employs a loop filter auto-shift (LFAS) technique. It uses an on-chip 1.5-bit Schmitt monitor to determine whether the input amplitude is large or small. The DSM automatically shifts to loop filter A for …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 11
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3684106
Publisher: IEEE

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A 16-MHz CMOS RC Frequency Reference Achieving Accuracies of ±125 ppm From −40 °C to 85 °C and −560/+580 ppm After Accelerated Aging

A 16-MHz CMOS RC Frequency Reference Achieving Accuracies of ±125 ppm From −40 °C to 85 °C and −560/+580 ppm After Accelerated Aging 150 150
Author(s): Runtao Huo, Weihao Jie, Yiwen Zhang, Honglan Jiang, Hui Wang

Abstract:

This article presents a low-power, high-accuracy CMOS RC frequency reference featuring a capacitively modulated RC time constant (CMT) generation and a die-to-die error removal (DDER) technique for precise frequency generation with a low-calibration cost. Unlike resistive trimming, the temperature dependence of the on-chip resistor is compensated by a $\Delta \Sigma $ …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 12
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3684094
Publisher: IEEE

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