Design of a CMOS 12 GHz Rotary Travelling Wave Oscillator with switched capacitor tuning

Abdeljelil, F. Ben; Tatinian, William; Carpineto, L.; Jacquemod, G.

doi:10.1109/rfic.2009.5135608

Cited by 15 publications

(22 citation statements)

References 9 publications

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“…Typically, there are four types of symmetric coupled lines: (a) coplanar stripline (CPS) [3,4], (b) coupled microstrip line [9], (c) coupled coplanar waveguide (CCPW), and (d) folded coupled coplanar waveguide (FC_CPW) in which an U-shaped return ground is employed [10]. Even in a symmetric coupled line, electromagnetic interference (EMI) effect would become very serious both at high oscillation frequencies and with full swing square waveforms (which are commonly occurred at RTW VCOs).…”

Section: Proposed Shielded Coplanar Striplinementioning

confidence: 99%

A 15-GHz CMOS Multiphase Rotary Traveling-Wave Voltage-Controlled Oscillator

Zhang

Wang

Zhao

et al. 2012

JSTS:Journal of Semiconductor Technology and Science

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This paper presents a 15-GHz multiphase rotary traveling-wave voltage-controlled oscillator (RTW VCO) where a shielded coplanar stripline (CPS) is exploited to provide better shielding protection and lower phase noise at a moderate cost of characteristic impedance and power consumption. Test chips were implemented in a standard 90-nm CMOS process, demonstrating the measured results of 2-GHz frequency tuning range,-11.3-dBm output power,-109.6-dBc/Hz phase noise at 1-MHz offset, and 2-ps RMS clock jitter at 15 GHz. The chip core occupies the area of 0.2 mm 2 and dissipates 12 mW from a single 1.2-V supply.

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Section: Proposed Shielded Coplanar Striplinementioning

confidence: 99%

A 15-GHz CMOS Multiphase Rotary Traveling-Wave Voltage-Controlled Oscillator

Zhang

Wang

Zhao

et al. 2012

JSTS:Journal of Semiconductor Technology and Science

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“…In contrast to LC-tank oscillators, wave-based oscillators are capable of providing an output frequency that is close to the cutoff frequency (f T ) of the device by distributing parasitic capacitances along the transmission line [17][18][19][20][21]. The characteristics of the transmission line determine the oscillation frequency [21].…”

Section: Oscillator Designmentioning

confidence: 99%

A 67-GHz low-phase-noise oscillator and its application in a polar transmitter

Nouri

Mirabbasi

2011

Analog Integr Circ Sig Process

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In this paper, a low-phase-noise 67-GHz CMOS oscillator is presented. This inductorless voltagecontrolled oscillator (VCO) employs a combination of standing-wave and travelling-wave oscillators to generate multi-phase outputs. A filtering technique is used to reduce the phase noise of the VCO. The oscillator achieves a tuning range of 5.2 GHz using a combination of coarse and fine tuning methods. The proposed multi-phase oscillator is designed and fabricated in a 0.13-lm CMOS process. Operating at 67 GHz, the VCO consumes 14 mW from a 1.2-V supply and achieves an output phase noise of -95.66 dBc/Hz (-107.89 dBc/Hz) at a 1 MHz (10 MHz) offset. The chip area is 0.9 mm 2 . As an application example for the presented multi-phase oscillator, a polar transmitter structure is proposed. The transmitter is designed for systems that use a circular quadrature-amplitude modulation (QAM) constellation. A specific example of a 16-QAM transmitter is presented. The desired output phase is chosen by an 8-to-1 multiplexer, and a variable gain amplifier (VGA) is used to achieve the desired amplitude. Based on post-layout simulations, the 60-GHz 16-QAM transmitter consumes 43.2 mW from a 1.2-V supply.

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“…Most particularly, it provides a more compact design and a lower phase noise at the cost of a higher consumption [4]. The corresponding topology is proposed in figure 7.…”

Section: Rtw and Lc Qvco Designmentioning

confidence: 99%

“…One PLL is based on a rotary travelling wave (RTW) voltage controlled oscillator (VCO), with a total tuning range from 11.1 to 12.3 GHz [4]. For sake of comparison, another PLL is designed using a more traditional LC QVCO.…”

Section: Introductionmentioning

confidence: 99%