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CMOS RFIC Noise Canceling Method 200931408 6 An Yong-jun
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CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

Dec 23, 2015

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

CMOS RFICNoise Canceling Method

2009314086 An Yong-jun

Page 2: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

Contents

Noise Cancelling in Wideband CMOS LNAsF. Bruccoleri, E.A.M. Klumperink, B. Nauta. In 2002, ISSCC

Page 3: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

Paper Study Flow

Noise Cancelling in Wideband CMOS LNAs

F. Bruccoleri, E.A.M. Klumperink, B. Nauta. In 2002, ISSCC

Today

SameCircuit

Page 4: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

Noise Cancelling in Wideband CMOS LNAs

Shunt FeedbackFor input matchingZin = Rs NF>3dBNF always lager than 3dB

Input noise current(ACL-1)times smaller than the others

Page 5: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

Noise Cancelling in Wideband CMOS LNAs

Noise Canceling from MOSFET(Not source)

Determine ‘A’

Page 6: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Same Opposite

Page 7: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Overall Gain :

Page 8: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Source FollowerVout = VYout+VXout

VYout = VY

VXout = VX * gm2/gm3

Noise cancelled which is gen-erated by this FET

Page 9: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

EF : (noise)Excess Factor

Higher gm2Rs Lower F

Less than 1

Page 10: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Noise cancelled point!

Page 11: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Page 12: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

►Robustness

Page 13: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

►Distortion canceling

Distortion comes from this FET

Distortion canceled like Thermal noise

Page 14: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

►High Freq. Limit.

Approximately CY=CL=0 1) CY and the load CL don’t affect the can-cellation

2) CL doesn’t affect the F of the LNA standalone

Source Impedance looks like

Page 15: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

@ High Freq, Noise cancelling is degraded

Page 16: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

But f0 is higher, - high fT

- Minimizing CIN

- reduce Miller effect

degrades frequency factor

Page 17: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

Page 18: CMOS RFIC Noise Canceling Method 2009314086 An Yong-jun.

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

►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.