A Direct Bulk Coupling PMOS Colpitts QVCO Using Capacitive-Feedback Structure
2019 ◽
Vol 28
(08)
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pp. 1950125
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In this paper, a full PMOS Colpitts quadrature voltage-controlled oscillator (QVCO) topology, suitable for low supply voltage and low power dissipation, is presented. For an enhanced voltage swing under a low supply voltage, the capacitive-feedback technique is employed. Quadrature coupling is achieved by employing direct bulk coupling technique, leading to reduction in both power and chip area. The proposed QVCO covers a 5% tuning range between 2.325 GHz and 2.435 GHz, and the phase noise is [Formula: see text]128.2 dBc/Hz at 1-MHz offset from the 2.34-GHz carrier while consuming only 0.535 mW from 0.55-V supply voltage, yielding a figure-of-merit (FoM) of 198 dBc/Hz.
2011 ◽
Vol 131
(8)
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pp. 1397-1402
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2012 ◽
Vol 256-259
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pp. 2373-2378
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2014 ◽
Vol 23
(01)
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pp. 1450004
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2021 ◽
Vol 24
(1)
◽
pp. 61
2020 ◽
Vol 10
(4)
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pp. 457-470
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