Mixers

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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

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A 10 to 40 GHz Reflection-Mode N-Path Filter

A 10 to 40 GHz Reflection-Mode N-Path Filter 150 150
Author(s): Cody J. Ellington, Sandeep Hari, Brian A. Floyd

Abstract:

A bandpass reflection-mode N-path filter (RMNF) with 2-GHz bandwidth and 10 to 40 GHz center-frequency tuning is presented. The design includes a broadband hybrid coupler, N-path reflectors, comprising four-phase passive mixers terminated with third-order in-phase and quadrature-phase active baseband loads, and a broadband clock-generation network. The reflectors realize an in-band open circuit …

Published in: IEEE Solid-State Circuits Letters
Page(s): 169 – 172
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3575536
Publisher: IEEE

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A Simultaneous Dual-Carrier Transformer-Coupled Passive Mixer-First Receiver Front-End Supporting Blocker Suppression

A Simultaneous Dual-Carrier Transformer-Coupled Passive Mixer-First Receiver Front-End Supporting Blocker Suppression 150 150
Author(s): Jamie C. Ye, Alain H. Antón, Sanaz Sadeghi, Russ H. Huang, Alyosha C. Molnar

Abstract:

A high dynamic range N-path passive mixer-first receiver architecture capable of simultaneously down-converting two arbitrary bands through a single RF port is presented. The architecture consists of two passive mixers arranged in a series configuration with a transformer front-end to minimize cross-loading between mixers while still providing impedance transparency and …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1541 – 1553
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3546082
Publisher: IEEE

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A Low-Power Blocker-Tolerant Wideband Receiver With Bias-Tunable Mixer and Effective Switch Resistance Compensation

A Low-Power Blocker-Tolerant Wideband Receiver With Bias-Tunable Mixer and Effective Switch Resistance Compensation 150 150
Author(s): Rundi Wu, Yetong Wang, Ran Hong, Zongle Ma, Kenan Xie, Fanyi Meng, Kaixue Ma, Keping Wang

Abstract:

This article presents a mixer-first blocker-tolerant receiver (RX) with effective switch resistance ( ${R} _{\text {SW}}$ ) compensation and high-Q selectivity. By analyzing the impact of non-ideal 1/N LO duty cycle and effective ${R} _{\text {SW}}$ on mixer-first RX, an effective ${R} _{\text {SW}}$ compensation technique is proposed to mitigate noise figure (…

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1554 – 1569
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3529681
Publisher: IEEE

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A Capacitive Stacking Mixer-First Receiver With Higher Order Capacitive Feedback

A Capacitive Stacking Mixer-First Receiver With Higher Order Capacitive Feedback 150 150
Author(s): Stef van Zanten, Ronan A. R. van der Zee, Bram Nauta

Abstract:

This article presents a capacitive stacking mixer-first receiver (MF-RX) with a higher order capacitive feedback (CFB) loop designed to increase interferer rejection right at the mixer baseband (BB) node, benefiting both the out-of-band (OOB) linearity of the passive mixer switches and the active BB circuitry. The CFB loop consists of …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 3148 – 3163
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2024.3524278
Publisher: IEEE

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