A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz fT SiGe HBT technology

Amit Bavisi; Jonathan P. Comeau; John D. Cressler; Madhavan Swaminathan; Man Chun Lam

doi:10.1109/SMIC.2005.1587930

A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology

Amit Bavisi, Jonathan P. Comeau, John D. Cressler, Madhavan Swaminathan, Man Chun Lam

Electrical Engineering

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

4 Scopus citations

Abstract

This paper presents the design of a novel SiGe HBT voltage controlled oscillator (VCO) that uses a lumped-element transformer as the feedback network. The VCO design employs a filter-type transformer, as opposed to an inductive transformer, to improve both the power consumption and tuning range. Unlike for the conventional cross-coupled differential oscillator and the coupled-Colpitt's oscillator, the transformer isolates the frequency selecting passive components from the parasitics of the biasing circuitry, enabling a linear tuning range of over 1 GHz (12 %) at 10 GHz. The isolation also improves the resonator loaded Q, thereby reducing the power consumption of the VCO. The measured phase noise varied between -108 dBc/Hz to -104 dBc/Hz @ 1 MHz offset over the entire tuning range of 1.04 GHz. The oscillator provides an output power of -7.5 dBm without any buffering, at 4.75 mW of power consumption from a 2 V power supply.

Original language	English (US)
Title of host publication	2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers
Pages	151-154
Number of pages	4
DOIs	https://doi.org/10.1109/SMIC.2005.1587930
State	Published - 2006
Event	2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - San Diego, CA, United States Duration: Jan 18 2006 → Jan 20 2006

Publication series

Name	2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers
Volume	2006

Conference

Conference	2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems
Country/Territory	United States
City	San Diego, CA
Period	1/18/06 → 1/20/06

All Science Journal Classification (ASJC) codes

General Engineering

Access to Document

10.1109/SMIC.2005.1587930

Cite this

Bavisi, A., Comeau, J. P., Cressler, J. D., Swaminathan, M., & Lam, M. C. (2006). A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology. In 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers (pp. 151-154). Article 1587930 (2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers; Vol. 2006). https://doi.org/10.1109/SMIC.2005.1587930

Bavisi, Amit ; Comeau, Jonathan P. ; Cressler, John D. et al. / A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology. 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers. 2006. pp. 151-154 (2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers).

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title = "A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz fT SiGe HBT technology",

abstract = "This paper presents the design of a novel SiGe HBT voltage controlled oscillator (VCO) that uses a lumped-element transformer as the feedback network. The VCO design employs a filter-type transformer, as opposed to an inductive transformer, to improve both the power consumption and tuning range. Unlike for the conventional cross-coupled differential oscillator and the coupled-Colpitt's oscillator, the transformer isolates the frequency selecting passive components from the parasitics of the biasing circuitry, enabling a linear tuning range of over 1 GHz (12 %) at 10 GHz. The isolation also improves the resonator loaded Q, thereby reducing the power consumption of the VCO. The measured phase noise varied between -108 dBc/Hz to -104 dBc/Hz @ 1 MHz offset over the entire tuning range of 1.04 GHz. The oscillator provides an output power of -7.5 dBm without any buffering, at 4.75 mW of power consumption from a 2 V power supply.",

author = "Amit Bavisi and Comeau, {Jonathan P.} and Cressler, {John D.} and Madhavan Swaminathan and Lam, {Man Chun}",

year = "2006",

doi = "10.1109/SMIC.2005.1587930",

language = "English (US)",

isbn = "0780394720",

series = "2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers",

pages = "151--154",

booktitle = "2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers",

note = "2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems ; Conference date: 18-01-2006 Through 20-01-2006",

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Bavisi, A, Comeau, JP, Cressler, JD, Swaminathan, M & Lam, MC 2006, A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology. in 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers., 1587930, 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers, vol. 2006, pp. 151-154, 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, San Diego, CA, United States, 1/18/06. https://doi.org/10.1109/SMIC.2005.1587930

A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology. / Bavisi, Amit; Comeau, Jonathan P.; Cressler, John D. et al.
2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers. 2006. p. 151-154 1587930 (2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers; Vol. 2006).

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

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N2 - This paper presents the design of a novel SiGe HBT voltage controlled oscillator (VCO) that uses a lumped-element transformer as the feedback network. The VCO design employs a filter-type transformer, as opposed to an inductive transformer, to improve both the power consumption and tuning range. Unlike for the conventional cross-coupled differential oscillator and the coupled-Colpitt's oscillator, the transformer isolates the frequency selecting passive components from the parasitics of the biasing circuitry, enabling a linear tuning range of over 1 GHz (12 %) at 10 GHz. The isolation also improves the resonator loaded Q, thereby reducing the power consumption of the VCO. The measured phase noise varied between -108 dBc/Hz to -104 dBc/Hz @ 1 MHz offset over the entire tuning range of 1.04 GHz. The oscillator provides an output power of -7.5 dBm without any buffering, at 4.75 mW of power consumption from a 2 V power supply.

AB - This paper presents the design of a novel SiGe HBT voltage controlled oscillator (VCO) that uses a lumped-element transformer as the feedback network. The VCO design employs a filter-type transformer, as opposed to an inductive transformer, to improve both the power consumption and tuning range. Unlike for the conventional cross-coupled differential oscillator and the coupled-Colpitt's oscillator, the transformer isolates the frequency selecting passive components from the parasitics of the biasing circuitry, enabling a linear tuning range of over 1 GHz (12 %) at 10 GHz. The isolation also improves the resonator loaded Q, thereby reducing the power consumption of the VCO. The measured phase noise varied between -108 dBc/Hz to -104 dBc/Hz @ 1 MHz offset over the entire tuning range of 1.04 GHz. The oscillator provides an output power of -7.5 dBm without any buffering, at 4.75 mW of power consumption from a 2 V power supply.

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Bavisi A, Comeau JP, Cressler JD, Swaminathan M, Lam MC. A 9 GHz, 5 mW VCO using lumped-element transformer feedback in 150 GHz f_T SiGe HBT technology. In 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers. 2006. p. 151-154. 1587930. (2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers). doi: 10.1109/SMIC.2005.1587930