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A Ping-Pong Charge-Sharing Locking PLL With Implicit Reference Doubling and Simultaneous Frequency/Duty-Cycle Calibrations

A Ping-Pong Charge-Sharing Locking PLL With Implicit Reference Doubling and Simultaneous Frequency/Duty-Cycle Calibrations 150 150
Author(s): Sayan Kumar, Teerachot Siriburanon, Sumit Dash, Patchara Sawakewang, Shuja Andrabi, Jon Strange, Khurram Muhammad, Chih-Ming Hung, Robert Bogdan Staszewski

Abstract:

We propose a new ping-pong (PP) charge-sharing locking (CSL) phase-locked loop (PLL) architecture that enhances the strength of charge-injection into the oscillator’s LC-tank using complementary charge-sharing capacitors during both positive and negative halves of the reference clock, effectively achieving an implicit $2times $ reference frequency multiplication. The design includes a …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1368 – 1383
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3535888
Publisher: IEEE

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A 32 Gb/s 0.36 pJ/bit 3 nm Chiplet IO Using 2.5-D CoWoS Package With Real-Time and Per-Lane CDR and Bathtub Monitoring

A 32 Gb/s 0.36 pJ/bit 3 nm Chiplet IO Using 2.5-D CoWoS Package With Real-Time and Per-Lane CDR and Bathtub Monitoring 150 150
Author(s): Junhui Gu, John Ma, Azhar Ahmed Chowdhury, Jianmin Guo, Xin Zhang, Jackson Ding, Hui Wang, Ken Chang

Abstract:

This article presents a high-density, single-ended non return to zero (NRZ) chiplet I/O implemented with 3 nm CMOS technology on a 2.5-D chip-on-wafer-on-substrate (CoWoS) interposer, accommodating trace lengths up to 2 mm. The design features 216 data lanes, each operating at 32 Gb/s. For the tested 2-mm trace, the channel insertion loss …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1289 – 1298
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3545483
Publisher: IEEE

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