Low-power and low-area CMOS quadrature RC oscillator with capacitive coupling

Luís Augusto Bica Gomes de Oliveira; DEE Group Author

doi:10.1109/ISCAS.2012.6271529

Low-power and low-area CMOS quadrature RC oscillator with capacitive coupling

Luís Augusto Bica Gomes de Oliveira, DEE Group Author

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

A quadrature oscillator based on two RC oscillators with capacitive coupling is proposed and analyzed. The capacitive coupling has the advantages of being noiseless and not increasing the power dissipation. Simulation results show that the oscillation frequency increases proportionally to the coupling capacitances, which is the opposite of what happens in capacitive coupled LC oscillators. Measurements on a 130 nm CMOS circuit prototype validate the theory of the coupling mechanism. The phase-noise is −115 dBc/Hz @ 10 MHz offset, and the FoM is −155.3 dBc/Hz, which is comparable to the best state-of-the art RC oscillators, yet the dissipated power is about four times less.

Original language	Unknown
Title of host publication	International Symposium on Circuits and Systems
Pages	1488-1491
DOIs	https://doi.org/10.1109/ISCAS.2012.6271529
Publication status	Published - 1 Jan 2012
Event	Circuits and Systems (ISCAS), 2012 IEEE International Symposium on - Duration: 1 Jan 2012 → …

Conference

Conference	Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Period	1/01/12 → …

Access to Document

10.1109/ISCAS.2012.6271529

Cite this

Oliveira, L. A. B. G. D., & DEE Group Author (2012). Low-power and low-area CMOS quadrature RC oscillator with capacitive coupling. In International Symposium on Circuits and Systems (pp. 1488-1491) https://doi.org/10.1109/ISCAS.2012.6271529

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abstract = "A quadrature oscillator based on two RC oscillators with capacitive coupling is proposed and analyzed. The capacitive coupling has the advantages of being noiseless and not increasing the power dissipation. Simulation results show that the oscillation frequency increases proportionally to the coupling capacitances, which is the opposite of what happens in capacitive coupled LC oscillators. Measurements on a 130 nm CMOS circuit prototype validate the theory of the coupling mechanism. The phase-noise is −115 dBc/Hz @ 10 MHz offset, and the FoM is −155.3 dBc/Hz, which is comparable to the best state-of-the art RC oscillators, yet the dissipated power is about four times less.",

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N2 - A quadrature oscillator based on two RC oscillators with capacitive coupling is proposed and analyzed. The capacitive coupling has the advantages of being noiseless and not increasing the power dissipation. Simulation results show that the oscillation frequency increases proportionally to the coupling capacitances, which is the opposite of what happens in capacitive coupled LC oscillators. Measurements on a 130 nm CMOS circuit prototype validate the theory of the coupling mechanism. The phase-noise is −115 dBc/Hz @ 10 MHz offset, and the FoM is −155.3 dBc/Hz, which is comparable to the best state-of-the art RC oscillators, yet the dissipated power is about four times less.

AB - A quadrature oscillator based on two RC oscillators with capacitive coupling is proposed and analyzed. The capacitive coupling has the advantages of being noiseless and not increasing the power dissipation. Simulation results show that the oscillation frequency increases proportionally to the coupling capacitances, which is the opposite of what happens in capacitive coupled LC oscillators. Measurements on a 130 nm CMOS circuit prototype validate the theory of the coupling mechanism. The phase-noise is −115 dBc/Hz @ 10 MHz offset, and the FoM is −155.3 dBc/Hz, which is comparable to the best state-of-the art RC oscillators, yet the dissipated power is about four times less.

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