Low cost signal source for multi-band multi-mode wireless systems
DOI:
https://doi.org/10.1109/ICATT.2007.4425146Keywords:
LO, multi-band, multi-mode, RCOAbstract
In multi-band multi-mode radio architectures, a number of local oscillator (LO) frequencies are required in order to process the information in various frequency bands. Since oscillators consume a substantial part of the chip area and battery power, this article describes the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates generate multiple frequencies with the user having an option of choosing a frequency or combination of them that eliminate the need of lossy switches for switching the frequency band, thereby improves the throughput.References
PODDAR, A.K. A Novel Approach for Designing Integrated Ultra Low Noise Microwave Wideband Voltage Controlled Oscillators. Dr.-Ing. Dissertation, TU- Berlin, Germany, 14 December 2004.
TIEBOUT, M. A CMOS fully integrated 1 GHz and 2 GHz dual band VCO with a voltage controlled inductor. Proc. of the 28th European Solid-State Circuits Conf., ESSCIRC 2002, 24-26 Sept. 2002, Florence, Italy. IEEE, 2002, p.799-802, http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1471648&navigation=1.
GOEL, A.; HASHEMI, H. Frequency Switching in Dual-Resonance Oscillators. IEEE J. Solid-State Circuits, Mar. 2007, v.42, n.3, p.571-582, doi: http://dx.doi.org/10.1109/JSSC.2006.891447.
ROHDE, U.L.; PODDAR, A.K.; BOCK, G. The Design of Modern Microwave Oscillators for Wireless Applications: Theory and Optimization. John Wiley & Sons, 2005, doi: http://dx.doi.org/10.1002/0471727172.
PODDAR, A.K.; KOUL, S.K.; BHAT, BHARTHI. Millimeter Wave Evanescent Mode Gunn Diode Oscillator in Suspended Stripline Configuration. Proc. of 22nd Int. Conf. on IR &MM Wave, July 1997, USA, p.265-266.
ROHDE, U.L.; PODDAR, A.K. Wideband voltage controlled oscillators employing evanescent mode coupled resonators. US Patent No. 71803812, Feb. 2007.
ROHDE, U.L.; PODDAR, A.K. Reconfigurable Concurrent Oscillators For Multi-Band Multi-Mode Wireless Communication Systems. Proc. of IEEE Sarnoff Symp., 30 April-02 May 2007, Princeton, NJ, USA. IEEE, 2007, p.1-6, doi: http://dx.doi.org/10.1109/SARNOF.2007.4567304.
ZHENBIAO, L.; O, K.K. Al-V low phase noise multi-band CMOS voltage controlled oscillator with switched inductors and capacitors. IEEE RFIC Symp. Dig., 2004. p.467-470.
YIM, S.; O, K.K. Switched resonators and their applications in dual-band monolithic CMOS LC-tuned VCO. IEEE Trans. Microwave Theory Tech., 2006, v.54, n.1, p.74-81.
