An Eight-Phase 40GHz RTWO in 28nm CMOS with Phase Noise Reduction Via Head and Tail Filtering

Salvatore, Giovanni A.; Kennedy, Michael Peter; Karim, Ahmed; Shanan, Hyman; Keaveney, Mike

doi:10.1109/icecs46596.2019.8965009

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…impedance to be resistive by forcing resonance at H2 for implicitly defining the CM path to align H2 and H1 voltage components in a quadrature manner [21], or by minimizing the delay between primary and secondary transformer windings in transformer-based LCO [3]. Similarly, A 2 can be minimized in an RTWO by adding an extra series LC resonance at H2 in each RTWO maintaining amplifier for explicitly defining the CM path to suppress the H2 harmonic currents [16]. However, this would be a narrow-band solution and consuming a large area.…”

Section: B Am-pm Mechanismmentioning

confidence: 99%

“…Furthermore, multiple phases are highly desired to support direct frequency conversion [5], [6], and to perform frequency multiplication [7]. As one of promising circuit topologies, a rotary traveling-wave oscillator (RTWO) has demonstrated its ability to generate multiple phases at mmW frequencies while achieving low PN [6], [8]- [16]. It is worth mentioning that the ability to generate multiple phases in an RTWO is traded off against a larger occupied area as compared with conventional LC oscillators (LCOs).…”

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confidence: 99%

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A Distributed Stubs Technique to Mitigate Flicker Noise Upconversion in a mm-Wave Rotary Traveling-Wave Oscillator

Shehata

Keaveney

Staszewski

2021

IEEE J. Solid-State Circuits

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A rotary traveling-wave oscillator (RTWO) has an ability to generate multiple phases at millimeter-wave (mmW) frequencies while achieving low phase noise (PN). Unfortunately, due to the practically unavoidable transmission line (TL) dispersion, which causes the higher-order harmonics to travel faster than the fundamental, RTWOs suffer from flicker noise upconversion. In this article, we propose a "distributed stubs" technique to mitigate this mechanism in which tuning capacitors placed on the TL stubs away from the maintaining amplifiers will slow down the travel speed of higher-order harmonics relative to the fundamental, thus lowering the phase shifts due to the TL dispersion. We further provide a comprehensive analysis of the flicker noise upconversion mechanism due to the TL dispersion. The proposed 26.2-30-GHz RTWO is implemented in 22-nm fully depleted silicon-on-insulator (FD-SOI) CMOS with eight differential phases. At 30 GHz, it achieves PN of −107.6 and −128.9 dBc/Hz at 1-and 10-MHz offsets, respectively. This translates into figures-of-merit (FoMs) of 184.2 and 185.4 dB, respectively, for a single phase. The proposed architecture consumes 20 mW from 0.8-V supply. It achieves a flicker PN corner of 180 kHz, which is an orderof-magnitude better than currently achievable by state-of-the-art mmW RTWOs.

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Section: B Am-pm Mechanismmentioning

confidence: 99%

mentioning

confidence: 99%

A Distributed Stubs Technique to Mitigate Flicker Noise Upconversion in a mm-Wave Rotary Traveling-Wave Oscillator

Shehata

Keaveney

Staszewski

2021

IEEE J. Solid-State Circuits

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A 190.3‐dBc/Hz FoM 16‐GHz rotary travelling‐wave oscillator with reliable direction control

Sun

Zhou

Bai

et al. 2021

Electronics Letters

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This letter presents a rotary travelling‐wave oscillator (RTWO) with reliable direction control in a standard 130 nm complementary metal–oxide–semiconductor (CMOS) technology. To achieve low phase noise (PN), and low power consumption, 16‐stages customised transmission line segments are designed and simulated on electromagnetic tools. The PN is investigated through modelling the RTWO as multiple standing‐wave oscillators. The proposed oscillator achieves 11.2% tuning range, 190.3 dBc/Hz figure‐of‐merit (FoM) at 1 MHz offset and 192.3 dBc/Hz FoM at 10 MHz offset with 5.8‐mW power consumption from 16‐GHz carrier.

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Architecture and Sensor-Level Performance of a 78 GHz Automotive Radar System-on-Chip in 22 nm FD-SOI CMOS

Gonser,

Doerner,

Gloekler

et al. 2023

2023 20th European Radar Conference (EuRAD)

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An Eight-Phase 40GHz RTWO in 28nm CMOS with Phase Noise Reduction Via Head and Tail Filtering

Cited by 3 publications

References 9 publications

A Distributed Stubs Technique to Mitigate Flicker Noise Upconversion in a mm-Wave Rotary Traveling-Wave Oscillator

A Distributed Stubs Technique to Mitigate Flicker Noise Upconversion in a mm-Wave Rotary Traveling-Wave Oscillator

A 190.3‐dBc/Hz FoM 16‐GHz rotary travelling‐wave oscillator with reliable direction control

Architecture and Sensor-Level Performance of a 78 GHz Automotive Radar System-on-Chip in 22 nm FD-SOI CMOS

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