High-swing class-C VCO

Tohidian, Massoud; Fotowat-Ahmadi, A.; Kamarei, Mahmoud; Ndagijimana, Fabien

doi:10.1109/esscirc.2011.6045015

Cited by 53 publications

(28 citation statements)

References 9 publications

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“…Figure 11 depicts the results of this comparison. The values in the range of better than -185 dBc/Hz are in line with FOMT levels for sub-1 V power supply CMOS VCO circuits reported in the literature [6], [8]- [12].…”

Section: B Power Consumption Tuning Range and Figure Of Merit Simulsupporting

confidence: 88%

Open loop approach to design low voltage, 400 mV, 1.3 mW, 10 GHz CMOS class-B VCO

Szczepkowski

Farrell

2012

2012 International Conference on Signals and Electronic Systems (ICSES)

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Abstract-The paper presents a method for design of LC cross-coupled oscillators based on an open loop technique and its practical application leading to a high frequency CMOS oscillator prototype. Thanks to the proposed approach, the main circuit parameters such as loaded quality factor (responsible for phase noise performance of LC oscillator) and steady-state oscillation amplitude, can be extracted without the necessity of time consuming transient simulations. The presented method is not technology specific and allows fast calculations under changing bias conditions. The proposed 130 nm CMOS prototype operates at 10 GHz from a 400m V power supply achieving an average SSB phase noise of -110 dBc/Hz at 1 MHz offset from the carrier and a fractional bandwidth of more than 7.5%. Low average power consumption of 1.3 mW RMS, has been obtained by biasing the oscillator devices to operate in class-B i.e. V GS = V DD = V th .

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Section: B Power Consumption Tuning Range and Figure Of Merit Simulsupporting

confidence: 88%

Open loop approach to design low voltage, 400 mV, 1.3 mW, 10 GHz CMOS class-B VCO

Szczepkowski

Farrell

2012

2012 International Conference on Signals and Electronic Systems (ICSES)

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“…This can be obtained for example by setting the gate voltage of MOS transistors below a threshold voltage so the only force periodically switching the transistors "on" and "off", comes from the sinusoidal signal generated by the oscillator itself. Thus, while biased in class-C, active devices in the oscillator core stay "on" for shorter time during each period than during start-up [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

350 mV, 0.5 mW, 5 GHz, 130 nm CMOS Class-C VCO Design Using Open Loop Analysis

Szczepkowski

Farrell

2012

IET Irish Signals and Systems Conference (ISSC 2012)

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“…It is obvious that phase noise increases with the supply voltage decreasing. According to Leesons phase noise equation [17,18], the output carrier power of VCO can become 4 times if the supply voltage is double, and phase noise decreases 6 dB with the same noise power, which can simply explain the dotted line in Fig. 17.…”

Section: Class-c Vco Ic Performancementioning

confidence: 97%

A 0.3-V power supply 2.4-GHz-band Class-C VCO IC with amplitude feedback loop in 65-nm CMOS

Yang

Uchida

et al. 2014

Analog Integr Circ Sig Process

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A Class-C voltage-control-oscillator (VCO) IC with an amplitude feedback loop for ultra-low-voltage application is proposed. The Class-C VCO consists of an LC-VCO circuit and an amplitude feedback loop to shift LC-VCO bias condition from initial Class-AB start-up to steady Class-C low current oscillation. The amplitude feedback loop is formed by a detector and a comparator with low voltage supply. The LC-VCO IC has been designed, fabricated and fully evaluated using 65-nm CMOS technology. The fabricated Class-C VCO IC exhibits a measured phase noise of À111 dBc/Hz at 1 MHz offset from the 2.43 GHz carrier frequency at a supply voltage of only 0.3 V.

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High-swing class-C VCO

Cited by 53 publications

References 9 publications

Open loop approach to design low voltage, 400 mV, 1.3 mW, 10 GHz CMOS class-B VCO

Open loop approach to design low voltage, 400 mV, 1.3 mW, 10 GHz CMOS class-B VCO

350 mV, 0.5 mW, 5 GHz, 130 nm CMOS Class-C VCO Design Using Open Loop Analysis

A 0.3-V power supply 2.4-GHz-band Class-C VCO IC with amplitude feedback loop in 65-nm CMOS

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