1. CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun

2. Contents Noise Cancelling in Wideband CMOS LNAs F. Bruccoleri, E.A.M. Klumperink, B. Nauta. In 2002, ISSCC

3. Paper Study Flow Noise Cancelling in Wideband CMOS LNAs F. Bruccoleri, E.A.M. Klumperink, B. Nauta. In 2002, ISSCC Today Same Circuit

4. Noise Cancelling in Wideband CMOS LNAs Shunt Feedback For input matching Z in = R s  NF>3dB NF always lager than 3dB Input noise current (A CL -1)times smaller than the others

5. Noise Cancelling in Wideband CMOS LNAs Noise Canceling from MOSFET (Not source)  Determine ‘A’

6. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling SameOpposite

7. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling Overall Gain :

8. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling Source Follower Vout = V Yout +V Xout V Yout = V Y V Xout = V X * g m2 / g m3 Noise cancelled which is generated by this FET

9. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling EF : (noise)Excess Factor Higher g m2 R s  Lower F Less than 1

10. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling Noise cancelled point!

11. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling

12. ►Robustness

13. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling ►Distortion canceling Distortion comes from this FET Distortion canceled like Thermal noise

14. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling ►High Freq. Limit. Approximately C Y =C L =0 1)C Y and the load C L don’t affect the cancellation 2)C L doesn’t affect the F of the LNA standalone Source Impedance looks like

15. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling @ High Freq, Noise cancelling is degraded

16. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling But f 0 is higher, - high f T - Minimizing C IN - reduce Miller effect degrades frequency factor

17. Wide-Band CMOS Low-Noise Amplifier Exploiting Thermal Noise Canceling

18. ►Conclusion simultaneous cancellation of noise and distortion terms due to the matching device; simultaneous noise and power matching for frequencies where the effect of parasitic capacitors can be neglected; orthogonality of design parameters for input impedance and gain, allowing for an easier implementation of variable gain while maintaining input impedance matching; robustness to variations in device parameters and the external source resistance ; applicability in other IC technologies and amplifier topologies.