Title | ||
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A 5-mW, 1.2-3.5-GHz Capacitive Degeneration in LC-Digitally-Controlled Oscillator for Nano-Satellite Frequency Synthesizers in 90-nm CMOS. |
Abstract | ||
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This paper proposes an 8-bit LC tuned digitally-controlled oscillator (DCO) that exploits a new tunable active inductor (TAI) with a high Q-factor. This TAI achieves a maximum Q-factor value of 98 over a frequency range of 1770 MHz. It tunes from 3.55 nH to 15.2 nH. The proposed TAI is used in the resonator of a wide tunable low-phase-noise DCO-LC oscillator. The tuning circuitry of the DCO with an additional resistance contributes to better effective capacitance characteristics as compared to the basic topology. Thanks to the capacitive degeneration network formed by a resistance connected in parallel with a capacity, the achieved frequency resolution is between 3 kHz and 16 kHz without any dithering. The proposed DCO with capacitive degeneration oscillates at a frequency that can be tuned from 1.22 to 3.52 GHz with 65% tuning range. It consumes 5.2-mA current from a 1.0-V voltage supply, achieves a phase noise of 105.8 dBc/Hz at 1-MHz offset and exhibits a figure of merit (FoM) of 178 dBc/Hz. The proposed digitally-controlled oscillator was implemented in TSMC 90-nm CMOS MS/RF technology. |
Year | DOI | Venue |
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2016 | 10.1142/S0218126616501590 | JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS |
Keywords | Field | DocType |
Tunable active inductor,digitally-controlled oscillator (DCO),capacitive degeneration,varactors,digital RF communications,CMOS | Digitally controlled oscillator,Computer science,Variable-frequency oscillator,Resonator,Phase noise,Inductor,Electronic engineering,Capacitive sensing,Vackář oscillator,CMOS,Electrical engineering | Journal |
Volume | Issue | ISSN |
25 | 12 | 0218-1266 |
Citations | PageRank | References |
3 | 0.53 | 6 |
Authors | ||
4 |
Name | Order | Citations | PageRank |
---|---|---|---|
Saad, S. | 1 | 6 | 4.40 |
Mhiri, M. | 2 | 6 | 4.40 |
Aymen Ben Hammadi | 3 | 3 | 0.87 |
Kamel Besbes | 4 | 44 | 15.41 |