A 184.6-dBc/Hz FoM 100-kHz Flicker Phase Noise Corner 30-GHz Rotary Traveling-Wave Oscillator Using Distributed Stubs in 22-nm FD-SOI

Shehata, Mohamed Atef; Keaveney, Mike; Staszewski, Robert Bogdan

doi:10.1109/esscirc.2019.8902916

Cited by 3 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section, we propose a method for reducing the flicker noise upconversion, which we call "distributed stubs" [15], and which is facilitated by the inherently distributed nature of RTWO. As discussed earlier in conjunction with ( 9) and ( 14), the generation of second harmonic (H2) is unavoidable since g 2 and A 2 are difficult to attenuate below a certain point.…”

Section: Distributed Stubs Techniquementioning

confidence: 99%

“…However, that technique is not effective at mmW frequencies due to a large delay introduced by the amplifier's physical connections to the ring. In this article, we propose a "distributed stubs" technique to reduce the flicker noise upconversion in mmW RTWO [15]. A phase shift is deliberately induced by separating the physical connections of the maintaining amplifier and the tuning capacitors along the RTWO ring.…”

mentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Distributed Stubs Techniquementioning

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…al. [6] demonstrated a low flicker noise corner RTWO in a 22 nm fully‐depleted‐silicon‐on‐Insulator (FDSOI) technology. Multiphase square‐like outputs suggest that RTWO can be employed in an all‐digital PLL (ADPLL) to replace the power‐hungry component, time‐to‐digital converter and digitally controlled oscillator (DCO).…”

Section: Introductionmentioning

confidence: 99%

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

Sun

Zhou

Bai

et al. 2021

Electronics Letters

View full text Add to dashboard Cite

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.

show abstract

“…This means that the intrinsic PN of the quadrupler and its input and output buffers is < −116.7 dBc/Hz at 1 MHz offset from 37 GHz carrier. The 1/f 3 PN corner (mostly due to RTWO[9,10]) is around 250 kHz at 37 GHz.…”

mentioning

confidence: 99%

A 32–42-GHz RTWO-Based Frequency Quadrupler Achieving >37 dBc Harmonic Rejection in 22-nm FD-SOI

Shehata

Roy

Breslin

et al. 2021

IEEE Solid-State Circuits Lett.

Self Cite

View full text Add to dashboard Cite

In this letter, we propose a 32-42 GHz frequency quadrupler that performs digital logic operations between four phase-shifted differential signals at one-fourth of the output frequency. The four phase-shifted signals are generated via a 10 GHz rotary traveling-wave oscillator (RTWO) and are symmetrically routed to the quadrupler using a CMOS buffered clock tree. The harmonic rejection ratio (HRR) is enhanced by employing a differential LC filter tuned at its output center frequency. The proposed frequency quadrupler is implemented in 22-nm FD-SOI CMOS. At 37 GHz, it produces an output power of −4 dBm with a 10% drain efficiency. It consumes 4 mW from 0.8 V supply and occupies a core area of 0.021 mm 2 . The worstcase HRR for fundamental. second, third, and fifth harmonics are 41.3, 48.6, 41.3, and 37.3 dBc, respectively.

show abstract

A 184.6-dBc/Hz FoM 100-kHz Flicker Phase Noise Corner 30-GHz Rotary Traveling-Wave Oscillator Using Distributed Stubs in 22-nm FD-SOI

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

A 32–42-GHz RTWO-Based Frequency Quadrupler Achieving >37 dBc Harmonic Rejection in 22-nm FD-SOI

Contact Info

Product

Resources

About