Low-power VCO for K-band Applications

Katebi, Mostafa; Nasri, A.; Toofan, Siroos

doi:10.1109/icee.2018.8472630

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Equations (2)- (5) show that the frequency increases by enhancing the temperature. Figure 5 shows the simulated frequency of the VCO without temperature Figure 5, the temperature drift is about 130 MHz.…”

Section: Proposed Temperature Compensated Circuitmentioning

confidence: 99%

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A Temperature Compensation Voltage Controlled Oscillator Using a Complementary to Absolute Temperature Voltage Reference

Katebi

Nasri

Toofan

et al. 2019

IJE

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T his paper presents a temperature compensation voltage controlled oscillator (VCO) based on Cross-Coupled pair and Colpitts structures which is suitable for military fields. Also, two inductors have been used for increasing the negative conductance. By using this method, start-up condition has been improved. Two varactors and a simple capacitor bank are applied for covering a wide tunning range. T he VCO has been designed and simulated in T SMC 0.18 µm CMOS technology.To compensate the frequency drift over a temperature range, MOS varactors are used and biased with a complementary to absolute temperature (CTAT) voltage reference. This CT AT voltage reference has been applied to two varactors and decreased the frequncy drift over temperature range. By using this technique, the proposed VCO can achieve a very stable frequency of 11.5 PPM/°C at 24.35 GHz over a temperature range of-40~120 °C. Simulation results also show the VCO covers the frequency range of 23.75~24.8 GHz. T he simulated phase noise of center frequency is-102.6 dBc/Hz at 1 MHz offset frequency. T he VCO consumes 10.4 mW DC power under 1.8 V supply voltage. The figure of merit of the VCO is-179.8 after compensating.

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Section: Proposed Temperature Compensated Circuitmentioning

confidence: 99%

“…Also, it is important to improve other parameters of VCO like power consumption and phase noise after frequency compensating over the temprature range. The phase noise and power consumption are two critical issues in designing VCO [2]- [5].…”

Section: Introductionmentioning

confidence: 99%

A Temperature Compensation Voltage Controlled Oscillator Using a Complementary to Absolute Temperature Voltage Reference

Katebi

Nasri

Toofan

et al. 2019

IJE

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13.95GHz–15.03GHz LC VCO using triple-coupling

Nasri

Katebi

Toofan

et al. 2019

2019 5th Conference on Knowledge Based Engineering and Innovation (KBEI)

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Design of a 41.14–48.11 GHz Triple Frequency Based VCO

et al. 2019

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Growing deployment of more efficient communication systems serving electric power grids highlights the importance of designing more advanced intelligent electronic devices and communication-enabled measurement units. In this context, phasor measurement units (PMUs) are being widely deployed in power systems. A common block in almost all PMUs is a phase locked oscillator which uses a voltage controlled oscillator (VCO). In this paper, a triple frequency based voltage controlled oscillator is presented with low phase noise and robust start-up. The VCO consists of a detector, a comparator, and triple frequency. A VCO starts-up in class AB, then steadies oscillation in class C with low current oscillation. The frequency of the VCO, which is from 13.17 GHz to 16.03 GHz, shows that the frequency is tripling to 41.14–48.11 GHz. Therefore, its application is not limited to PMUs. This work has been simulated in a standard 0.18 µm CMOS process. The simulated VCO achieves a phase noise of −99.47 dBc/Hz at 1 MHz offset and −121.8 dBc/Hz at 10 MHz offset from the 48.11 GHz carrier.

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Low-power VCO for K-band Applications

Cited by 3 publications

References 11 publications

A Temperature Compensation Voltage Controlled Oscillator Using a Complementary to Absolute Temperature Voltage Reference

A Temperature Compensation Voltage Controlled Oscillator Using a Complementary to Absolute Temperature Voltage Reference

13.95GHz–15.03GHz LC VCO using triple-coupling

Design of a 41.14–48.11 GHz Triple Frequency Based VCO

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