IEEE Solid-State Circuits Letters

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A 58.9–73.7-GHz Quadrature Dual-Core Class-F₃,₅ Oscillator With Tail-Assisted Implicit Quintupling

A 58.9–73.7-GHz Quadrature Dual-Core Class-F₃,₅ Oscillator With Tail-Assisted Implicit Quintupling 150 150
Author(s): Yevhenii Mormul, Patchara Sawakewang, Sayan Kumar, Chawin Khongprasongsiri, Teerachot Siriburanon, Robert Bogdan Staszewski

Abstract:

We introduce a new class-F3,5 oscillator topology that enables quadrature operation by duplicating a conventional class-F3 oscillator core and electromagnetically coupling the two cores through a pair of additional coils feeding source terminals of the $g_{m}$ transistors. The coupling network enhances the fifth-harmonic component, enabling efficient extraction and quadrature …

Published in: IEEE Solid-State Circuits Letters
Page(s): 198 – 201
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3699799
Publisher: IEEE

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A 6-bit Serializer With Integrated Manchester Encoder Using Flexible a-IGZO TFT Technology

A 6-bit Serializer With Integrated Manchester Encoder Using Flexible a-IGZO TFT Technology 150 150
Author(s): Suyash Shrivastava, Pydi Ganga Bahubalindruni

Abstract:

This article presents an experimental characterization of a novel 6-bit parallel-to-serial data converter integrated with a Manchester encoder. The system comprises an on-chip digital logic block that generates six mutually nonoverlapping control signals ( $\phi _{0-5}$ ) and three 120° phase-shifted clock signals to drive the switching transistors in the serializer and the …

Published in: IEEE Solid-State Circuits Letters
Page(s): 194 – 197
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3707465
Publisher: IEEE

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A Sampling PLL With Boosted Phase Detection Gain Achieving 52 fs RMS Jitter and 110.4 MHz Lock-In Range

A Sampling PLL With Boosted Phase Detection Gain Achieving 52 fs RMS Jitter and 110.4 MHz Lock-In Range 150 150
Author(s): Hyogyoung An, Changmin An, Sungjin Kim, Heein Yoon

Abstract:

This work presents a sampling phase-locked loop (SPLL) that simultaneously achieves sub-sampling SPLL (SSPLL)-level jitter and wide lock-in range ( $f_{\mathbf {lock}}$ ) inherent to SPLL architecture. By employing a high phase detection gain, the proposed SPLL ensures low in-band phase noise (PN) dominated by reference, while maintaining robust re-locking …

Published in: IEEE Solid-State Circuits Letters
Page(s): 202 – 205
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3710778
Publisher: IEEE

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A Low-Power MRAM-Based Nonvolatile Flip-Flop Architecture for Register and System Applications

A Low-Power MRAM-Based Nonvolatile Flip-Flop Architecture for Register and System Applications 150 150
Author(s): Bayartulga Ishdorj, Taehui Na

Abstract:

This work presents a minimal nonvolatile flip-flop (NVFF) hybrid architecture and an NV static contention-free differential FF (nvSCDFF) cell that reduces the overhead associated with replicated NV circuitry in conventional in situ NVFFs while enabling low power. By using only one NVFF per column and compact SCDFF-based volatile flip-flops (FFs), …

Published in: IEEE Solid-State Circuits Letters
Page(s): 206 – 209
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3713204
Publisher: IEEE

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A 4-GS/s 53.5-dB SNDR 12.9 fJ/conv. TI-SAR ADC With Capacitive Nonlinearity Compensation and Dual-Mode Offset Calibration

A 4-GS/s 53.5-dB SNDR 12.9 fJ/conv. TI-SAR ADC With Capacitive Nonlinearity Compensation and Dual-Mode Offset Calibration 150 150
Author(s): Jiazhen Ni, Dayi Zhou, Minqing Cai, Chen Chen, Xiang Gao, Seung-Chul Lee

Abstract:

Successive approximation register (SAR) analog-to-digital converters (ADCs) often employ dual-mode dynamic comparators to achieve both high speed and low noise. However, under low-supply operation, offset drift from mode transitions and degraded front-end linearity due to limited signal headroom become critical challenges. To address these issues, an adaptive current-injection scheme suppresses …

Published in: IEEE Solid-State Circuits Letters
Page(s): 214 – 217
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3713349
Publisher: IEEE

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Merged-Reference-Compatible Offset-Canceling Discharge-Based Sensing Circuit for STT-MRAM in 28-nm CMOS

Merged-Reference-Compatible Offset-Canceling Discharge-Based Sensing Circuit for STT-MRAM in 28-nm CMOS 150 150
Author(s): Jaeyong Jang, Mingu Han, Jaehwan Kim, Taehui Na

Abstract:

This article proposes an offset-canceling (OC) discharge-based sensing circuit (OCDC) for spin-transfer-torque magnetic random access memory (STT-MRAM). The proposed circuit simultaneously implements a merged reference line (MRL) architecture and threshold voltage ( $\mathbf {V}_{\mathbf {TH}}$ ) mismatch cancellation, resolving the structural incompatibility between the conventional OC schemes and MRL. A diode-connection-based, …

Published in: IEEE Solid-State Circuits Letters
Page(s): 210 – 213
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3715234
Publisher: IEEE

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A 42-Gb/s PAM-3 Transmitter With a CML Driver and a Dual-Mode Encoder for Process-Variation-Tolerant Middle-Level Generation

A 42-Gb/s PAM-3 Transmitter With a CML Driver and a Dual-Mode Encoder for Process-Variation-Tolerant Middle-Level Generation 150 150
Author(s): Seungwoo Park, Taehwan Kim, Changmin Sim, Seongcheol Kim, Junseob So, Hwaseok Shin, Seon-Been Lee, Chulwoo Kim

Abstract:

This letter presents a 42-Gb/s differential PAM-3 transmitter using a current-mode logic (CML) driver and a dual-mode 3B2T encoder for process-variation-tolerant middle-level (M-level) generation. The encoder selects between two M-level encoding schemes to compensate for load-resistor and driver-current-path mismatches with minimal logic overhead, reducing the standard deviation of …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3720204
Publisher: IEEE

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miniSQI: A Compact and Low-Power SQIsign-1D Post-Quantum Digital Signature Verification Accelerator

miniSQI: A Compact and Low-Power SQIsign-1D Post-Quantum Digital Signature Verification Accelerator 150 150
Author(s): Krishna Sai Tarun Ramapragada, Utsav Banerjee

Abstract:

We present the first ASIC demonstration of SQIsign, an isogeny-based NIST-candidate post-quantum digital signature scheme. Our optimized Montgomery modular multiplier circuit design enables 2× speedup and energy savings, while efficient memory organization provides 31% area savings. We implement SQIsign-1D-Uncompressed signature verification in a small form factor with low power consumption suitable …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3720807
Publisher: IEEE

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A 40-Gb/s 8-mW-OMA GaN-Based 1-to-N VCSEL Driver for Parallel and Wireless Optical Transmitter Frontends

A 40-Gb/s 8-mW-OMA GaN-Based 1-to-N VCSEL Driver for Parallel and Wireless Optical Transmitter Frontends 150 150
Author(s): S. Sarah Feng, Fuzhan Chen, H. Bruce Bao, R. Matthew Ma, Kangping Zhong, P. T. Alan Lau, C. Patrick Yue

Abstract:

This letter presents a broadband, high-OMA GaN-based 1-to-N VCSEL driver implemented in 150-nm GaN HEMT process for parallel and wireless optical transmitter frontends. It further compares split-node and conventional VCSEL-driving topologies and analyzes the bandwidth scaling and inter-VCSEL timing skew of series- and parallel-connected VCSEL arrays. Leveraging the high voltage-handling …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3720689
Publisher: IEEE

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