NDLI: A dual-band SiGe HBT differential VCO using a control voltage for both band-switching and frequency-tuning

Content Provider	IEEE Xplore Digital Library
Author	Wei Cao Tashiro, Y. Itoh, Y.
Copyright Year	2010
Description	Author affiliation: Electrical and Information Engineering, Graduate School, Shonan Institute of Technology, 1-1-25 Tsujido-Nishikaigan, Fujisawa, Kanagawa, 251-8511 Japan (Wei Cao; Tashiro, Y.; Itoh, Y.)
Abstract	This paper presents a novel dual-band SiGe HBT differential VCO using a control voltage for both band-switching and frequency-tuning. It uses a dual-band resonator comprised of a HPF connected in parallel with a series LC circuit and back-to-back varactor diodes. A dual-band switching is achieved by feeding a forward or reverse bias for the varactor diodes. In addition, a frequency-tuning is realized by varying a control voltage for the varactor diodes. A miniaturized size and high performance are expected since no additional VCOs, resonators, matching elements, control voltages or currents are required for a dual-band switching. The implemented 0.35-µm SiGe HBT differential VCO has presented a low-band oscillation from 0.65 to 0.93 GHz with a control voltage from 5.1 to 16 V and a high-band oscillation from 1.49 to 1.56 GHz with a control voltage from 0 to 5 V. A supply voltage keeps constant with 5 V. The phase noise at 100 kHz offset shows less than −104 dBc/Hz for the low-band oscillation and less than −102 dBc/Hz for the high-band oscillation. This is the first report on the dual-band differential VCO using a control voltage for both band-switching and frequency-tuning.
Starting Page	449
Ending Page	452
File Size	780894
Page Count	4
File Format	PDF
ISBN	9781424475902
e-ISBN	9784902339215
e-ISBN	9781902339222
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-07
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	IEICE Institute of Electronics Informati
Subject Keyword	Dual band Voltage control Voltage-controlled oscillators Varactors Phase noise Frequency control varactor diode VCO SiGe HBT dual-band band-switching frequency-tuning
Content Type	Text
Resource Type	Article

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