1. A Fast-Hopping Single-PLL 3-Band MB-OFDM UWB Synthesizer Remco C. H. van de Beek, Member, IEEE, Domine M. W. Leenaerts, Fellow, IEEE, and Gerard van der Weide 2015/9/19EE306 RFIC R&F Lab1 Presented by Romi Fan

2. Abstract A 3-band (mode 1) multiband-OFDM UWB synthesizer implemented in a 0.25-um SiGe BiCMOS process. Crucial in the design is a divide-by-5 frequency divider that generates quadrature signals at a frequency of 528 MHz. The 0.44 mm 2 fully integrated synthesizer consumes 52mW from a 2.7 V supply. Out-of-band spurious tones are below 50 dBc. The measured frequency transition time is well below the required 9.5 ns. 2015/9/19EE306 RFIC R&F Lab2 OFDM : Orthogonal Frequency Division Multiplexing

3. Outline Introduction Introduction The single-PLL Architecture The single-PLL Architecture ◦ A.Divide-by-1.5 ◦ B.Divide-by-5 Measurements VCO Design VCO Design Conclusion 2015/9/19EE306 RFIC R&F Lab3

4. 2015/9/19EE306 RFIC R&F Lab4 LTCC Low-Temperature Cofired Ceramics SAW Surface Acoustic Wave ISM Industrial Scientific Medical U-NII Unlicensed National Information Infrastructure UWB UltraWideBand BPF Bandpass Filter

5. 2015/9/19EE306 RFIC R&F Lab5 f(t)=A Bcosωtcos(ωt+θ)

6. Introduction UWB is now becoming an industrial standard in the 3–10 GHz frequency range under IEEE802.15.3a (WPAN). The multi-band OFDM alliance (MBOA) proposal divides the spectrum into 14 channels (bands) with a spacing of 528 MHz [1], [2] (see Fig. 1), using quadrature phase shift keying (QPSK)- OFDM, where high data rates of up to 480 Mb/s are achieved. 2015/9/19EE306 RFIC R&F Lab6

7. Introduction 2015/9/19EE306 RFIC R&F Lab7

8. Introduction To allow co-existence with WLAN applications operating in 2.4 GHz ISM (e.g., IEEE 802.11b/g and Bluetooth) and 5 GHz ISM (e.g., IEEE 802.11a), spurious tones in or near these frequency ranges should be below 45 dBc and 50 dBc, respectively, to avoid harmful down- conversion of strong out-of-band interferers into the wanted bands. In-band spurious tones should be below 30 dBc to allow co-existence with other UWB systems. 2015/9/19EE306 RFIC R&F Lab8

9. Introduction [5] D. Leenaerts et al.,“A SiGe BiCMOS 1 ns fast hopping frequency synthesizer for UWB radio,” in IEEE ISSCC Dig. Tech. Papers, 2005,pp. 202–203. PLL&BiCmos performance [6] C.-C. Lin and C.-K. Wang,“A regenerative semi-dynamic frequency divider for mode-1 MB-OFDM UWB hopping carrier generation,” in IEEE ISSCC Dig. Tech. Papers, 2005, pp. 206–207. Dividers [7] A. Ismail and A. Abidi,“A 3.1 to 8.2 GHz direct conversion receiver for MB-OFDM UWB communication,” in IEEE ISSCC Dig. Tech. Papers, 2005, pp. 208–209. BiCmos performance [8] B. Razavi et al.,“A 0.13umCMOS UWBtransceiver,” in IEEE ISSCC Dig. Tech. Papers, 2005, pp. 216–217. 2015/9/19EE306 RFIC R&F Lab9

10. Introduction Ref[5] 2015/9/19EE306 RFIC R&F Lab10

11. Introduction Ref[6] 2015/9/19EE306 RFIC R&F Lab11

12. Introduction Ref[7] 2015/9/19EE306 RFIC R&F Lab12

13. Introduction Ref[8] 2015/9/19EE306 RFIC R&F Lab13

14. Introduction Miller divider Tai-Cheng Lee and Yen-Chuang Huang,“A Miller Divider Based Clock Generator for MBOA-UWB Application,” in Symposium on VLSI Circuits Digest of Technical Papers, 2005, pp. 34–37. 2015/9/19EE306 RFIC R&F Lab14

15. The single-PLL Architecture 2015/9/19EE306 RFIC R&F Lab15

16. The single-PLL Architecture A.Divide-by-1.5 2015/9/19EE306 RFIC R&F Lab16

17. The single-PLL Architecture B.Divide-by-5 2015/9/19EE306 RFIC R&F Lab17

18. The single-PLL Architecture B.Divide-by-5 2015/9/19EE306 RFIC R&F Lab18

19. The single-PLL Architecture B.Divide-by-5 2015/9/19EE306 RFIC R&F Lab19

20. The single-PLL Architecture B.Divide-by-5 2015/9/19EE306 RFIC R&F Lab20

21. VCO Design The 7920 MHz LC-oscillator uses an on-chip inductor for low phase noise and power dissipation. The 0.6 nH single-turn differential inductor is realized using the 3 um-thick top metal layer on a deep trench isolation g rid. The VCO consumes 4.8 mA from a 2V on-chip supply regulator. The measured VCO phase noise is -97 dBc/Hz at an offset frequency of 1 MHz. 2015/9/19EE306 RFIC R&F Lab21

22. VCO Design 2015/9/19EE306 RFIC R&F Lab22

23. Measurements The synthesizer has been implemented in a 0.25-um SiGe BiCMOS process with an NPN f t of 70 GHz. The synthesizer (excluding the 1.056 GHz clock generator and the 50 Ω measurement buffers) draws 19.3 mA from a 2.7 V supply (52 mW). The close-in phase noise is below 90 dBc/Hz and the VCO phase noise is below 120 dBc/Hz at 10 MHz offset. 2015/9/19EE306 RFIC R&F Lab23

24. Measurements 2015/9/19EE306 RFIC R&F Lab24

25. Measurements 2015/9/19EE306 RFIC R&F Lab25

26. Measurements 2015/9/19EE306 RFIC R&F Lab26

27. Conclusion The 52 mW power dissipation is better than other reported BiCMOS solutions and is close to the 45 mW reported for the CMOS concept in [8](105mW). The spurious tones performance of the proposed divide-by-7.5 is better than the one reported in [6] where levels of -20 dBc were reported. The complete design enables co-operability with WLAN/WPAN applications in the 2.4 GHz and 5 GHz frequency bands. 2015/9/19EE306 RFIC R&F Lab27

28. 2015/9/19EE306 RFIC R&F Lab28 IMD-1 Via-1 Metal-1 ILD Contact N & P Well Gate&Gox Plug-2 Metal-2 NMOS PMOS I/O PMOSResistor Core PMOS Core NMOS Capacitor I/O NMOS STI Plug-1

29. 2015/9/19EE306 RFIC R&F Lab29

30. 2015/9/19EE306 RFIC R&F Lab30 Thanks for your attention.