1. 1 A Low Power CMOS Low Noise Amplifier for Ultra-wideband Wireless Applications 指導教授 : 林志明 學生 : 黃世一 m93510021@mail.ntou.edu.tw

2. 2 Outline Abstract Introduction Design Concepts Implementation Simulation Results Conclusion References

3. 3 Abstract A CMOS low noise amplifier (LNA) for low- power ultra-wideband (UWB) wireless applications. To achieve low power consumption and wide operating bandwidth. LNA employing stagger tuning technique consists of two stacked common-source stages with different resonance frequencies.

4. 4 0.18μm CMOS process 2.6-9.2-GHz bandwidth maximum forward gain (S21) of 10.9 dB 1.8-V supply and 7.1 mW noise figure 3.5 dB IIP3 of – 5.1 dBm

5. 5 Introduction UWB performs excellently for short-range high-speed uses Low power consumption The low noise amplifier (LNA) affect performance of signal bandwidth, noise figure, and power dissipation of the entire system

6. 6 A feed-forward noisecanceling technique to minimize noise figure -3dB bandwidth is limited by device dimensions Difficult to achieve the frequency band requirement of UWB applications Serial resistor was used to improve the gain at low frequency

7. 7 Design Concepts Noise performance Linearity Buffer Input impedance matching matching network at the input to resonate over the entire frequency band Hypass capacitor Coupling capacitor

8. 8 The minimum noise figure is give by F min : the minimum noise factor ω : frequency of interest ω T : cutoff frequency; γ : the coefficients of drain noise δ : the coefficients of gate noise С : the correlation term

9. 9

10. 10 By controlling the gain peak at the lower bound of the frequency range, a very flat gain curve can be obtained over wide bandwidth

11. 11 Implementation

12. 12 4.92pf 2.5nH 1000fF 0.9nH 1.8nH 350fF 4.3mA

13. 13 Simulation Results

14. 14 S11, S22, S21 and S12

15. 15 Noise figure

16. 16 Two-tone test and 1dB compression

17. 17 Conclusion

18. 18 References Chang-Ching Wu; Mei-Fen Chou; Wuen, W.-S.; Kuei-Ann Wen; Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on 23-26 May 2005 Page(s):5063 - 5066 Digital Object Identifier 10.1109/ISCAS.2005.1465772

19. 19 Thank You For Your Attention