Calibration

  • No Comments

A 240-GHz Sub-THz Direct-Conversion Transmitter With I/Q Phase Calibration in 40-nm CMOS

A 240-GHz Sub-THz Direct-Conversion Transmitter With I/Q Phase Calibration in 40-nm CMOS 150 150
Author(s): Chun-Sheng Lin, Chih-Hsueh Lin, Chun-Hsing Li

Abstract:

A 240-GHz direct-conversion transmitter (TX), consisting of an LO chain and fundamental I/Q mixers, is proposed for sub-THz communication applications. The LO chain integrates phase-shifter-embedded impedance matching networks (IMNs) and frequency tripler with an optimized harmonic IMN, delivering I/Q LO signals at 240 GHz with high output power, 360° phase …

Published in: IEEE Solid-State Circuits Letters
Page(s): 225 – 228
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3592246
Publisher: IEEE

View on IEEE Xplore

  • No Comments

A 6.2b-ENOB 2.5 GS/s Flash-and-VCO-Based Subranging ADC Using a Residue Shifting Technique

A 6.2b-ENOB 2.5 GS/s Flash-and-VCO-Based Subranging ADC Using a Residue Shifting Technique 150 150
Author(s): Sungjin Kim, Jeonghyun Lee, Yoonse Cho, Jintae Kim, Jaehyouk Choi, Heein Yoon

Abstract:

This letter presents a 7-bit pipelined subranging ADC that integrates a 3-bit flash ADC with a ring VCO-based quantizer. A resistor-ladder-based residue shifter (RLRS) replaces traditional residue amplifiers, efficiently shifting the residue voltage into the most linear region of the $K_{textrm {VCO}}$ , thereby eliminating the need for post-linearity calibration. …

Published in: IEEE Solid-State Circuits Letters
Page(s): 177 – 180
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3578546
Publisher: IEEE

View on IEEE Xplore

  • No Comments

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

View on IEEE Xplore

  • No Comments

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

View on IEEE Xplore

Search this website