PCB-Based Cross-Coupled Differential VCOs Using a Novel LC-Tank Comprised of the Chip Inductors

Hikaru IKEDA; Yasushi ITOH

doi:10.1587/transele.E101.C.744

PCB-Based Cross-Coupled Differential VCOs Using a Novel LC-Tank Comprised of the Chip Inductors

Hikaru IKEDA, Yasushi ITOH

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The paper presents the analysis, design and performance of PCB (Printed Circuit Board)-based cross-coupled differential VCOs using a novel LC-tank. As compared with the conventional LC-tank, a novel LC-tank is comprised of only chip inductors and thus has an advantage in providing a higher cutoff frequency. This feature attributes to the use of the parasitic elements of the chip inductors and capacitors. The cutoff frequencies were compared for both LC-tanks by calculation, simulation and measurement. Then the traditional cross-coupled differential oscillators having both LC-tanks were designed, fabricated and performed by using 0.35µm SiGe HBTs and 1005-type chip devices. The implemented oscillator using a novel LC-tank has shown a 0.12GHz higher oscillation frequency, while phase noise characteristics were almost the same. In addition, the cross-coupled differential oscillator utilizes a series RL circuit in order to suppress the concurrent oscillations. The implemented cross-coupled differential VCO employing Si varactor diodes with a capacitance ratio of 2.5 to 1 has achieved a tuning frequency of 0.92 to 1.28GHz, an output power greater than -13.5dBm, a consumed power less than 8.7mW and a phase noise at 100kHz offset in a range from -104 to -100dBc/Hz.

Publication: IEICE TRANSACTIONS on Electronics Vol.E101-C No.10 pp.744-750

Publication Date: 2018/10/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E101.C.744

Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technologies)

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Authors

Hikaru IKEDA
Panasonic
Yasushi ITOH
Shonan Institute of Technology

Keyword

microwave, differential, cross-coupled, VCO, LC-tank, SiGe HBT

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Hikaru IKEDA, Yasushi ITOH, "PCB-Based Cross-Coupled Differential VCOs Using a Novel LC-Tank Comprised of the Chip Inductors" in IEICE TRANSACTIONS on Electronics, vol. E101-C, no. 10, pp. 744-750, October 2018, doi: 10.1587/transele.E101.C.744.
Abstract: The paper presents the analysis, design and performance of PCB (Printed Circuit Board)-based cross-coupled differential VCOs using a novel LC-tank. As compared with the conventional LC-tank, a novel LC-tank is comprised of only chip inductors and thus has an advantage in providing a higher cutoff frequency. This feature attributes to the use of the parasitic elements of the chip inductors and capacitors. The cutoff frequencies were compared for both LC-tanks by calculation, simulation and measurement. Then the traditional cross-coupled differential oscillators having both LC-tanks were designed, fabricated and performed by using 0.35µm SiGe HBTs and 1005-type chip devices. The implemented oscillator using a novel LC-tank has shown a 0.12GHz higher oscillation frequency, while phase noise characteristics were almost the same. In addition, the cross-coupled differential oscillator utilizes a series RL circuit in order to suppress the concurrent oscillations. The implemented cross-coupled differential VCO employing Si varactor diodes with a capacitance ratio of 2.5 to 1 has achieved a tuning frequency of 0.92 to 1.28GHz, an output power greater than -13.5dBm, a consumed power less than 8.7mW and a phase noise at 100kHz offset in a range from -104 to -100dBc/Hz.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E101.C.744/_p

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@ARTICLE{e101-c_10_744,
author={Hikaru IKEDA, Yasushi ITOH, },
journal={IEICE TRANSACTIONS on Electronics},
title={PCB-Based Cross-Coupled Differential VCOs Using a Novel LC-Tank Comprised of the Chip Inductors},
year={2018},
volume={E101-C},
number={10},
pages={744-750},
abstract={The paper presents the analysis, design and performance of PCB (Printed Circuit Board)-based cross-coupled differential VCOs using a novel LC-tank. As compared with the conventional LC-tank, a novel LC-tank is comprised of only chip inductors and thus has an advantage in providing a higher cutoff frequency. This feature attributes to the use of the parasitic elements of the chip inductors and capacitors. The cutoff frequencies were compared for both LC-tanks by calculation, simulation and measurement. Then the traditional cross-coupled differential oscillators having both LC-tanks were designed, fabricated and performed by using 0.35µm SiGe HBTs and 1005-type chip devices. The implemented oscillator using a novel LC-tank has shown a 0.12GHz higher oscillation frequency, while phase noise characteristics were almost the same. In addition, the cross-coupled differential oscillator utilizes a series RL circuit in order to suppress the concurrent oscillations. The implemented cross-coupled differential VCO employing Si varactor diodes with a capacitance ratio of 2.5 to 1 has achieved a tuning frequency of 0.92 to 1.28GHz, an output power greater than -13.5dBm, a consumed power less than 8.7mW and a phase noise at 100kHz offset in a range from -104 to -100dBc/Hz.},
keywords={},
doi={10.1587/transele.E101.C.744},
ISSN={1745-1353},
month={October},}

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TY - JOUR
TI - PCB-Based Cross-Coupled Differential VCOs Using a Novel LC-Tank Comprised of the Chip Inductors
T2 - IEICE TRANSACTIONS on Electronics
SP - 744
EP - 750
AU - Hikaru IKEDA
AU - Yasushi ITOH
PY - 2018
DO - 10.1587/transele.E101.C.744
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E101-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2018
AB - The paper presents the analysis, design and performance of PCB (Printed Circuit Board)-based cross-coupled differential VCOs using a novel LC-tank. As compared with the conventional LC-tank, a novel LC-tank is comprised of only chip inductors and thus has an advantage in providing a higher cutoff frequency. This feature attributes to the use of the parasitic elements of the chip inductors and capacitors. The cutoff frequencies were compared for both LC-tanks by calculation, simulation and measurement. Then the traditional cross-coupled differential oscillators having both LC-tanks were designed, fabricated and performed by using 0.35µm SiGe HBTs and 1005-type chip devices. The implemented oscillator using a novel LC-tank has shown a 0.12GHz higher oscillation frequency, while phase noise characteristics were almost the same. In addition, the cross-coupled differential oscillator utilizes a series RL circuit in order to suppress the concurrent oscillations. The implemented cross-coupled differential VCO employing Si varactor diodes with a capacitance ratio of 2.5 to 1 has achieved a tuning frequency of 0.92 to 1.28GHz, an output power greater than -13.5dBm, a consumed power less than 8.7mW and a phase noise at 100kHz offset in a range from -104 to -100dBc/Hz.
ER -