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A 52-to-67 GHz dual-core push–push VCO in 40-nm CMOS

  • Vadim Issakov (a1), Johannes Rimmelspacher (a1) (a2), Saverio Trotta (a1), Marc Tiebout (a3), Amelie Hagelauer (a2) and Robert Weigel (a2)...


We present a continuously tunable 52-to-67 GHz push–push dual-core voltage-controlled oscillator (VCO) in a 40 nm bulk complementary metal–oxide–semiconductor (CMOS) technology. The circuit is suitable for 60 GHz frequency-modulated-continuous-wave radar applications requiring a continuously tunable ultra-wide modulation bandwidth. The LC-tank inductor is used to couple the two VCO cores. The fundamental frequency of the VCO can be tuned from 26 to 33.5 GHz, which corresponds to a frequency tuning range of 25%. The second harmonic is extracted in a non-invasive way using a transformer. The primary side acts simultaneously as a second harmonic filter. The VCO achieves in measurement a low phase noise of −91.8 dBc/Hz at 1 MHz offset at 62 GHz and an output power of −20 dBm. The VCO including buffers dissipates in the dual-core operation mode 60 mA from a single 1.1 V supply and consumes a chip area of 0.58 mm2.


Corresponding author

Author for correspondence: Vadim Issakov, Email:


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1.Voinigescu, SP, Dickson, TO, Gordon, M, Lee, C, Yao, T, Mangan, A, Tang, K and Yau, KHK (2006) RF and millimeter-wave IC design in the nano-(Bi)CMOS era. In Si- based Semiconductor Components for Radio-Frequency Integrated Circuits (RF IC), Transworld Research Network, pp. 3362.
2.Voinigescu, S (2013) High-Frequency Integrated Circuits. Cambridge, UK: Cambridge University Press, pp. 142254 .
3.Knapp, H, Treml, M, Schinko, A, Kolmhofer, E, Matzinger, S, Strasser, G, Lachner, R, Maurer, L and Minichshofer, J (2012) Three channel 77 GHz automotive radar transmitter in plastic package. In RFIC Symposium, pp. 119122.
4.Trotta, S, Dehlink, B, Reuter, R, Yin, Y, John, J, Kirchgessner, J, Morgan, D, Welch, P, Lin, J-J, Knappenberger, B, To, I and Huang, M (2009) A multi-channel Rx for 76.5 GHz automotive radar applications with 55 dB IF channel-to-channel isolation. In EuMIC, pp. 192195.
5.Forstner, HP, Knapp, H, Jager, H, Kolmhofer, E, Platz, J, Starzer, F, Treml, M, Schinko, A, Birschkus, G, Bock, J, Aufinger, K, Lachner, R, Meister, T, Schafer, H, Lukashevich, D, Boguth, S, Fischer, A, Reininger, F, Maurer, L, Minichshofer, J and Steinbuch, D (2008) A 77 GHz 4-channel automotive radar transceiver in SiGe. In RFIC Symposium, pp. 233236.
6.Issakov, V, Siprak, D, Tiebout, M, Thiede, A, Simburger, W and Maurer, L (2009) Comparison of 24 GHz receiver front-ends using active and passive mixers in CMOS. IET Circuits, Devices & Systems (CDS) 3(6), 340349.
7.Leeson, D (1966) A simple model of feedback oscillator noise spectrum. IEEE Proceedings 54(2), 329330.
8.Tiebout, M (2009) Low Power VCO Design in CMOS. Berlin: Springer.
9.Ahmadi-Mehr, SAR, Tohidian, M and Staszewski, RB (2016) Analysis and design of a multi-core oscillator for ultra-low phase noise. IEEE Transactions on Circuits and Systems I: Regular Papers 63(4), 529539.
10.Tiebout, M (2001) Low-power low-phase-noise differentially tuned quadrature VCO design in standard CMOS. IEEE Journal of Solid-State Circuits 36(7), 10181024.
11.Fanori, L and Andreani, P (2013) Highly efficient class-C CMOS VCOs, including a comparison with class-B VCOs. IEEE Journal of Solid-State Circuits 48(7), 17301740.
12.Kimura, K, Okada, K and Matsuzawa, A (2015) A 20 GHz class-C VCO using noise sensitivity mitigation technique. In IEEE SiRF, pp. 8082.
13.Fanori, L and Andreani, P (2013) Class-D CMOS oscillators. IEEE Journal of Solid-State Circuits 48(12), 31053119.
14.Babaie, M and Staszewski, RB (2013) A class-F CMOS oscillator. IEEE Journal of Solid-State Circuits 48(12), 31203133.
15.Babaie, M and Staszewski, RB (2015) An ultra-low phase noise class-F2 CMOS oscillator with 191 dBc/Hz FoM and long-term reliability. IEEE Journal of Solid-State Circuits 50(3), 679692.
16.Hegazi, E, Sjöland, H and Abidi, AA (2001) A filtering technique to lower LC oscillator phase noise. IEEE Journal of Solid-State Circuits 36(12), 19211930.
17.Iotti, L, Mazzanti, A and Svelto, F (2017) Insights into phase-noise scaling in switch-coupled multi-core LC VCOs for E-band adaptive modulation links. IEEE Journal of Solid-State Circuits 52(7), 17031718.
18.Yin, J and Luong, HC (2013) A 57.5-90.1-GHz magnetically tuned multimode CMOS VCO. IEEE Journal of Solid-State Circuits 48(8), 18511861.
19.Jia, H, Chi, B, Kuang, L and Wang, Z (2015) A 47.6-71.0-GHz 65-nm CMOS VCO based on magnetically-coupled pi-type LC network. Transmission MTT 63(5), 16451657.
20.Rimmelspacher, J, Weigel, R, Hagelauer, A and Issakov, V (2017) 36% frequency-tuning-range dual-core 60 GHz push–push VCO in 45 nm RF-SOI CMOS technology. In IEEE IMS.
21.Issakov, V, Rimmelspacher J Trotta, S, Tiebout, M, Hagelauer, A and Weigel, R (2017) A 52-to-67 GHz dual-core push–push VCO in 40-nm CMOS. In IEEE EuMC, pp. 755758.
22.Issakov, V (2011) Microwave Circuits for 24 GHz Automotive Radar in Silicon-based Technologies. Berlin: Springer.
23.Trotta, S, Wintermantel, M, Dixon, J, Moeller, U, Jammers, R, Hauck, T, Samulak, A, Dehlink, B, Shun-Meen, K, Li, H, Ghazinour, A, Yin, Y, Pacheco, S, Reuter, R, Majied, S, Moline, D, Aaron, T, Trivedi, VP, Morgan, DJ and John, J (2012) An RCP packaged transceiver chipset for automotive LRR and SRR systems in SiGe BiCMOS technology. IEEE Transactions on Microwave Theory and Techniques 60(3), 778794.
24.Craninckx, J and Steyaert, M (1997) A 1.8-GHz low-phase-noise CMOS VCO using optimized hollow spiral inductors. IEEE Journal of Solid-State Circuits 32(5), 736744.
25.Kinget, P (1999) Integrated GHz Voltage Controlled Oscillators. Boston: Kluwer, pp. 353381.
26.Bevilacqua, A, Pavan, FP, Sandner, C, Gerosa, A and Neviani, A (2007) Transformer-based dual-mode voltage-controlled oscillators. IEEE Transactions on Circuits and Systems II: Express Briefs 54(4), 293297.
27.Goel, A and Hashemi, H (2007) Frequency switching in dual-resonance oscillators. IEEE Journal of Solid-State Circuits 42(3), 571582.
28.Issakov, V, Wojnowski, M, Knoblinger, G, Fulde, M, Pressel, K and Sommer, G (2011) A 5.9-to-7.8 GHz VCO in 65-nm CMOS using high-Q inductors in an embedded wafer level BGA package. In IMS.
29.Zong, Z, Babaie, M and Staszewski, RB (2015) A 60 GHz 25% tuning range frequency generator with implicit divider based on third harmonic extraction with 182 dBc/Hz FoM. In RFIC Symp., pp. 279282.
30.Trivedi, VP, To, K-H and Huang, WM (2011) A 77 GHz CMOS VCO with 11.3 GHz tuning range, 6 dBm output power, and competitive phase noise in 65 nm bulk CMOS. In RFIC Symposium, pp. 14.
31.Mammei, E, Monaco, E, Mazzanti, A and Svelto, F (2013) A 33.6-to-46.2 GHz 32 nm CMOS VCO with 177.5 dBc/Hz minimum noise FOM using inductor splitting for tuning extension. In IEEE International Solid-State Circuits Conference (ISSCC) on Digital Technology Papers, pp. 350351.
32.Nasr, I, Dudek, M, Weigel, R and Kissinger, D (2012) A 33% tuning range high output power V-band superharmonic coupled quadrature VCO in SiGe technology. In RFIC Symposium, pp. 301304.
33.Shin, D, Raman, S and Koh, K-J (2015) A 0.6-V, 30-GHz six-phase VCO with superharmonic coupling in 32-nm SOI CMOS technology. In IEEE Custom Integrated Circuits Conference (CICC).
34.Plouchart, J-O, Ferriss, MA, Natarajan, AS, Valdes-Garcia, A, Sadhu, B, Rylyakov, A, Parker, BD, Beakes, M, Babakhani, A, Yaldiz, S, Pileggi, L, Harjani, R, Reynolds, S, Tierno, JA and Friedman, D (2013) A 23.5 GHz PLL with an adaptively biased VCO in 32 nm SOI-CMOS. Trans. IEEE Circuits and Systems – I: Regular Papers 60(8), 20092017.
35.Chao, Y and Luong, HC (2013) A transformer-based dual-band VCO and ILFDs for wide-band mm-wave LO generation. In IEEE Custom Integrated Circuits Conference (CICC), pp. 14.


A 52-to-67 GHz dual-core push–push VCO in 40-nm CMOS

  • Vadim Issakov (a1), Johannes Rimmelspacher (a1) (a2), Saverio Trotta (a1), Marc Tiebout (a3), Amelie Hagelauer (a2) and Robert Weigel (a2)...


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