Title :
Varactor diodeless harmonic VCOs for GHz-range applications
Author :
Stadius, Kuri ; Kaumisto, R. ; Porra, Veikko
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
Two methods for extending the tuning range of monolithic LC-oscillators are discussed in this paper. The first approach is to use actively synthesized capacitor based on the Miller effect instead of a p-n junction varactor diode for the VCO tuning. In the second approach we use a balanced variable impedance converter for the same purpose. In this approach tuning is based on current steering. All together eight experimental circuits have been designed with a 0.8 μm BiCMOS process parameters
Keywords :
BiCMOS analogue integrated circuits; MMIC oscillators; UHF integrated circuits; UHF oscillators; circuit tuning; harmonic oscillators (circuits); voltage-controlled oscillators; 0.8 micron; BiCMOS process parameters; GHz-range applications; Miller effect; VCO tuning; actively synthesized capacitor; balanced variable impedance converter; current steering; harmonic VCO; monolithic LC oscillators; tuning range; varactor diodeless VCO; varactorless VCO; Capacitance; Capacitors; Circuit optimization; Diodes; Frequency; Impedance; Phase noise; Tuning; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.812333
