TY - GEN
T1 - Low phase noise 18 kHz frequency tuning step 5 GHz DCO using tiny capacitors based on transmission lines
AU - Pokharel, Ramesh
AU - Uchida, K.
AU - Tomar, A.
AU - Kanaya, Haruichi
AU - Yoshida, K.
PY - 2010/4/23
Y1 - 2010/4/23
N2 - We proposed a method to realize the fine frequency-tuning step using tiny capacitors instead of MIM capacitors for a digitally controlled oscillator (DCO). The tiny capacitors are realized by the coplanar transmission lines in a 6 metal layers (M6) foundry of 0.18 um CMOS technology. These transmission line based capacitors are designed by using electromagnetic field simulator, and co-designed by using SPICE simulator. Finally, we fabricated the proposed DCO in 0.18 um CMOS technology, and tested. The measured phase noise of DCO was -118.3 dBc/Hz (@1MHz offset frequency), and the oscillating frequency tuned from 4.86 GHz to 5.36 GHz in the minimum frequency-tuning step of 18 kHz.
AB - We proposed a method to realize the fine frequency-tuning step using tiny capacitors instead of MIM capacitors for a digitally controlled oscillator (DCO). The tiny capacitors are realized by the coplanar transmission lines in a 6 metal layers (M6) foundry of 0.18 um CMOS technology. These transmission line based capacitors are designed by using electromagnetic field simulator, and co-designed by using SPICE simulator. Finally, we fabricated the proposed DCO in 0.18 um CMOS technology, and tested. The measured phase noise of DCO was -118.3 dBc/Hz (@1MHz offset frequency), and the oscillating frequency tuned from 4.86 GHz to 5.36 GHz in the minimum frequency-tuning step of 18 kHz.
UR - http://www.scopus.com/inward/record.url?scp=77951026167&partnerID=8YFLogxK
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U2 - 10.1109/SMIC.2010.5422841
DO - 10.1109/SMIC.2010.5422841
M3 - Conference contribution
AN - SCOPUS:77951026167
SN - 9781424454587
T3 - 2010 10th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2010 - Digest of Papers
SP - 8
EP - 11
BT - 2010 10th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2010 - Digest of Papers
T2 - 2010 10th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2010
Y2 - 11 January 2010 through 13 January 2010
ER -