Title :
A quad-mode DCO for multi-standard communication application
Author :
Bo Jiang ; Tian Xia
Author_Institution :
Sch. of Eng., Univ. of Vermont, Burlington, VT, USA
Abstract :
This paper proposes a quad-mode digitally controlled oscillator (DCO) for multi-band frequency synthesizer application. The DCO consists of an LC-tank using three inductors and two varactor arrays. Four different inductances and capacitances are obtained by tuning corresponding varactor values, which result in four resonances to increase the frequency tuning range. The simulation results show that the proposed DCO output frequency covers the frequency ranges from 1.5GHz to 2.5GHz and from 4.3GHz to 6.2GHz, which are suitable for multistandard applications.
Keywords :
UHF oscillators; frequency synthesizers; inductors; microwave oscillators; varactors; LC-tank; digitally controlled oscillator; frequency 1.5 GHz to 2.5 GHz; frequency 4.3 GHz to 6.2 GHz; multiband frequency synthesizer; multistandard communication; quad-mode DCO; three inductors; two varactor arrays; CMOS integrated circuits; Inductors; Phase noise; Resonant frequency; Switches; Tuning; Varactors; DCO; multi-standard; phase locked-loop; phase noise; tuning range;
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7169125
