A 65–81 GHz CMOS Dual-Mode VCO Using High Quality Factor Transformer-Based Inductors

Basaligheh, Ali; Saffari, Parvaneh; Filanovsky, I.M.; Moez, Kambiz

doi:10.1109/tcsi.2020.3004859

Cited by 24 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation ( 14) is obtained by substituting (10) into (7). As expected, it shows the relationship of the inverse proportionality that binds min to T .…”

Section: Tank Quality Factormentioning

confidence: 59%

“…Moreover, transformer-based topologies can be profitably exploited at mm-wave frequencies since they show the advantage of a better PN, thanks to an enhanced resonator Q-factor, as is shown below. To increase the VCO tuning range, switched resonators (i.e., switchedcapacitor or switched-inductor resonators) are used [7]. However, special care must be spent on the switch losses and parasitic capacitances, which could impact the resonator Q-factor and the tuning range, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transformer-Based VCO for W-Band Automotive Radar Applications

et al. 2021

View full text Add to dashboard Cite

A transformer-based voltage-controlled oscillator for a W-band frequency-modulated continuous-wave (FMCW) automotive radar application is presented. The design challenges imposed by the millimeter-wave frequency operation were faced through a circuit and layout co-design approach, supported by extensive electromagnetic simulations and accurate analysis of both the start-up condition and the tank quality factor. The oscillator was implemented in a 28-nm fully depleted silicon-on-insulator (SOI) complementary metal–oxide–semiconductor (CMOS) technology. It provided a 37 GHz oscillation frequency with a variation of around 4 GHz, thus achieving a tuning range of 11%. Moreover, a 77 GHz output signal was also delivered, which was extracted as a second harmonic from the input-pair common-mode node. The circuit exhibited low phase noises, whose average performances were −97 dBc/Hz and −121 dBc/Hz at 1 MHz and 10 MHz offset frequencies, respectively. It delivered a 77-GHz output power of −10.5 dBm and dissipated 26 mW with a 1 V power supply. The silicon area occupation was 300 × 135 µm.

show abstract

“…Equation ( 14) is obtained by substituting (10) into (7). As expected, it shows the relationship of the inverse proportionality that binds min to T .…”

Section: Tank Quality Factormentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Transformer-Based VCO for W-Band Automotive Radar Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It could be argued that the most recent researches in LC oscillators are derived from an innovative change in differential Colpitts and cross-coupled oscillators. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] A precise study of PN in these oscillators was conducted in Andreani et al 29 and according to Hajimiri's method. The results show that the cross-coupled oscillator has better PN than the other one.…”

Section: Standardmentioning

confidence: 99%

Phase noise suppression in LC oscillators: Tutorial

Bagheri

2021

Circuit Theory & Apps

View full text Add to dashboard Cite

This paper presents a comprehensive study of phase noise (PN) suppression in LC-tank oscillators. The goal of this study is to provide designers with the latest techniques for reducing PN in cross-coupled oscillators. To this end, we begin with a discussion of two prevalent PN models in oscillators: Hajimiri and Demir. We prefer the Hajimiri model because it does not involve very complicated math, and it offers engineers better insight into designing low-PN oscillators in the two-PN close-in regions in an oscillator spectrum (1/f 2 and 1/f 3 ). In 1/f 2 region, we show that a need for a large output-voltage swing leads to Class D and B oscillators, and a large output-current swing results in Class C oscillators. Also, reduction of the impulse sensitivity functions (ISFs) of an oscillator core can happen in Class F oscillators. A few solutions are presented for mitigating flicker noise up-conversion, such as adding resistances, controlling the oscillation amplitude, decreasing the conduction angle, guiding the high-frequency harmonics of current, and shifting the phase of V GS against V DS . We also provide a comparison of recent state-of-the-art literature to show what constitutes a good PN in both 1/f 2 and 1/f 3 regions in cross-coupled oscillators. We conclude that a cross-coupled oscillator can reach the best performances in 1/f 3 and 1/f 2 PN regions if the oscillator is designed in Class C with the K block and uses the techniques of narrowing the conduction angle, the tail inductor, and the modified tank simultaneously.

show abstract

“…Usually, the voltage-controlled oscillator (VCO) and the millimeter-wave frequency divider need to work in high frequencies and a wide band. Recently, some wideband VCOs [9,10,11] and multi-mode VCOs [12,13,14,15,16,17] have been demonstrated with ultra-wide tuning bands. For example, [9] exhibits a wideband VCO with a 39.5% relative tuning range.…”

Section: Introductionmentioning

confidence: 99%

An ultra-wideband injection-locked frequency divider with a multi-order resonator and the passive injection-boosted technique

Cheng

et al. 2022

IEICE Electron. Express

View full text Add to dashboard Cite

This paper presents an ultra-wideband injection-locked frequency divider (ILFD) design which is applicable to a multi-applications system. A transformer-based multi-order resonator is utilized in the ILFD to attain a flat phase response. The passive injection-boosted technique is proposed to increase the injection signal amplitude and thus widen the locking range. With the injection-boosted technique and the multi-order resonator, the proposed ILFD demonstrates a measured locking range of 50 GHz, covering 48 GHz to 98 GHz. The divider designed in a 40-nm process consumes a DC power of 11.2 mW excluding buffers and occupies a core size of 0.38 × 0.63 mm 2 .

show abstract

A 65–81 GHz CMOS Dual-Mode VCO Using High Quality Factor Transformer-Based Inductors

Cited by 24 publications

References 36 publications

Transformer-Based VCO for W-Band Automotive Radar Applications

Transformer-Based VCO for W-Band Automotive Radar Applications

Phase noise suppression in LC oscillators: Tutorial

An ultra-wideband injection-locked frequency divider with a multi-order resonator and the passive injection-boosted technique

Contact Info

Product

Resources

About