Bandwidth

An H-Band Continuous Broadband RF-Domain Quadrature Receiver Using a Harmonic-Enhanced LO Generator in 65-nm CMOS

An H-Band Continuous Broadband RF-Domain Quadrature Receiver Using a Harmonic-Enhanced LO Generator in 65-nm CMOS 150 150

Abstract:

This article presents an $H$ -band CMOS receiver chipset that covers a wide frequency range of 228–324 GHz, supporting the entire band of IEEE Std. 802.15.3d. The proposed receiver employs an RF-domain quadrature mixer-first architecture to alleviate the design burden of quadrature local oscillator (LO) signal generation in $H$ -band, which …

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A 0.0035-mm2 86-dB-SNR 1.25-MHz-BW Noise-Shaping SAR ADC Enabling kT/C Noise Shaping

A 0.0035-mm2 86-dB-SNR 1.25-MHz-BW Noise-Shaping SAR ADC Enabling kT/C Noise Shaping 150 150

Abstract:

This work presents a compact second-order noise shaping successive approximation register (NS-SAR) analog-to-digital converter (ADC) featuring a novel kT/C noise shaping technique. The proposed kT/C noise shaping technique selectively suppresses kT/C noise within the signal bandwidth of an oversampled SAR ADC. It avoids using a wideband noise …

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A 31.5–36-GHz Low-Spur Digitally Assisted Gain-Boosting Charge-Sharing Locking PLL Achieving 54-fs RMS Jitter

A 31.5–36-GHz Low-Spur Digitally Assisted Gain-Boosting Charge-Sharing Locking PLL Achieving 54-fs RMS Jitter 150 150

Abstract:

This article presents a 31.5–36 GHz digitally assisted gain-boosting (GB) charge-sharing locking (CSL) phase-locked loop (PLL) that achieves record-low reference spurs while maintaining sub-60 fs integrated jitter. In conventional CSL PLLs, reference spur suppression is fundamentally traded against loop bandwidth, whereas ping-pong CSL (PP-CSL) approaches typically require complex duty-cycle calibration. The …

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MTDiff: A Multi-Task Diffusion Accelerator With Bandwidth-Aware Memory Partition and Efficient Digital Compute-in-Memory

MTDiff: A Multi-Task Diffusion Accelerator With Bandwidth-Aware Memory Partition and Efficient Digital Compute-in-Memory 150 150

Abstract:

Initially applied to image synthesis, diffusion models have rapidly expanded into various content generation tasks, such as 3-D scene reconstruction and video generation, due to the superior generative quality. Based on our observations, the imbalanced operational intensities across diffusion model layers lead to suboptimal hardware utilization due to inadequate bandwidth …

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THz-TSI: A Terahertz Wireless Through-Silicon Interconnect Module for Advanced 3-D Integration Applications

THz-TSI: A Terahertz Wireless Through-Silicon Interconnect Module for Advanced 3-D Integration Applications 150 150

Abstract:

By vertically stacking device layers, advanced 3-D integration overcomes traditional planar scaling limits, delivering the bandwidth and power efficiency essential for modern artificial intelligence (AI) and high-performance computing (HPC) integrated systems. However, continued scaling of conventional through-silicon vias (TSVs) and microbumps presents critical bottlenecks due to inherent thermo-mechanical stress, complex …

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A Fast-Settling mm-Wave LO With I/Q-Calibrated SSB Mixer and Frequency-Tuned ILO Filter Achieving Sub-ns Settling Time and −56 dBc Spur

A Fast-Settling mm-Wave LO With I/Q-Calibrated SSB Mixer and Frequency-Tuned ILO Filter Achieving Sub-ns Settling Time and −56 dBc Spur 150 150

Abstract:

This article presents a fast-settling 60-GHz local oscillator (LO) for stepped-carrier orthogonal frequency-division multiplexing (OFDM), employing an I/Q-calibrated single-sideband (SSB) mixer with a frequency-tuned injection-locked oscillator (ILO) filter. The SSB mixer enables instantaneous frequency hopping, while the ILO acts as a high- $Q$ bandpass filter that suppresses mixer-induced spurs. …

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BASS-PLL: A Bandwidth Augmented Sub-Sampling PLL Achieving a Wide Bandwidth Above 30% of the Reference Frequency and a Worst Case FoMREF of −247.9 dB at 3 GHz With a Ring Oscillator

BASS-PLL: A Bandwidth Augmented Sub-Sampling PLL Achieving a Wide Bandwidth Above 30% of the Reference Frequency and a Worst Case FoMREF of −247.9 dB at 3 GHz With a Ring Oscillator 150 150

Abstract:

This work presents a bandwidth augmented sub-sampling phase-locked loop (BASS-PLL) architecture that features simultaneous out-of-band noise suppression by direct and multipath sampling of the ring oscillator’s (ROs) output and in-band noise suppression via an intrinsic sub-sampling mechanism, ultimately combining the benefits of over-sampling PLLs (OS-PLLs) and sub-sampling PLLs (SS-PLLs) …

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An 18.4-Gb/s/pin Simultaneous Bidirectional Transceiver for Post HBM4 Using Four-Phase Hybrid Timing Alignment and Dual Equalization

An 18.4-Gb/s/pin Simultaneous Bidirectional Transceiver for Post HBM4 Using Four-Phase Hybrid Timing Alignment and Dual Equalization 150 150

Abstract:

This letter presents a simultaneous bidirectional (SBD) transceiver for post HBM4. It is difficult to increase the data rate due to poor channel characteristics of the silicon interposer and the limited physical area of the IO in high-bandwidth memory (HBM) interface. SBD signaling is attractive because it doubles the per-pin …

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A Self-Injection LC Oscillator for Flicker Noise Reduction

A Self-Injection LC Oscillator for Flicker Noise Reduction 150 150

Abstract:

Self-injection has been used in lasers and photonic integrated circuits to reduce the laser’s phase noise (PN). We show that self-injection can be leveraged in GHz LC oscillators as well. Our oscillator employs a current-domain self-injection technique by leveraging second-harmonic extraction, capacitive phase shifting, and self-mixing through the oscillator’…

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