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http://dx.doi.org/10.5515/KJKIEES.2007.18.2.177

Differential LC VCO with Enhanced Tank Structure and LC Filtering Techniques in InGaP/GaAs HBT Technology  

Lee, Sang-Yeol (RFIC Research and Education Center, Department of Electronic Engineering, Kwangwoon University)
Kim, Nam-Young (RFIC Research and Education Center, Department of Electronic Engineering, Kwangwoon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.18, no.2, 2007 , pp. 177-182 More about this Journal
Abstract
This paper presents the InGaP/GaAs HBT differential LC VCO with low phase noise performance for adaptive feedback interference cancellation system(AF-lCS). The VCO is verified with enhanced tank structure including filtering technique. The output tuning range for proposed VCO using asymmetric inductor and symmetric capacitors withlow pass filtering technique is 207 MHz. The output powers are -6.68 including balun and cable loss. The phase noise of this VCO at 10 kHz, 100 kHz and 1 MHz are -102.02 dBc/Hz, -112.04 dBc/Hz and -130.40 dBc/Hz. The VCO is designed within total size of $0.9{\times}0.9mm^2$.
Keywords
Symmetrical And Asymmetrical Inductance Tank Structures; Monolithic Microwave Integrated Circuit(MMIC); Heterodyne Bipolar Transistor(HBT); Differential LC VCO; Phase Noise; Cross Coupled Configuration;
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