Design and Analysis of Ultra-wide Band Mixer

8/3/2019 Design and Analysis of Ultra-wide Band Mixer

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DESIGN AND ANALYSIS OF

ULTRA-WIDE BAND MIXER

GUIDED BY PRESENTED BY

Prof. RAJESH KHATRI OM SARAF

(E&I Dept.) M.Tech (E&I.)

Microelectronics &VLSI design


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Content Introduction

Literature survey

Specification

Basics of GILBERT MIXER

Design guideline

Basic design

Modified design

Further modification

Mixer with test bench

S11 parameter

S22 parameter

Conversion gain

1dB compression point

IIP3-point

My Results


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Introduction

Inreceiverside first antenna comes in picturethanthat signal for

modification forwardto LNA (lownoise amplifier)than a filterstates in

betweenthem andthan forcatchingthose signals carrierof same frequency

generated by local ossilatorandthan formixing a unitcomes inuse and

thatis MIXER whichgenerate IF signals.

VERY BASIC DESIGN IS AS

Introduction


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Literature survey An Improved Highly-Linear Low-Power Down-Conversion Micromixer for 77 GHz Automotive

Radar in SiGe Technology 2006 IEEE.

AN ULTRAWIDEBAND (UWB) MIXER WITH 0.18 UM RF CMOS TECHNOLOGY Department of

Electrical and Computer Engineering University of Manitoba Winnipeg, Manitoba, Canada.

A Novel 0.6V CMOS Folded Gilbert-Cell Mixer for UWB Applications 2008 IEEE.

A Low Power Folded Mixer for UWB System Applications in 0.18-m CMOS Technology.

A Low-Noise UWB CMOS Mixer Using Switched Biasing Technique RFIT2007-IEEE International

Workshop.

A 1.2-V, 5.8-mW, Ultra-Wideband Folded Mixer in 0.13-m CMOS 2007 IEEE Radio Frequency

Integrated Circuits Symposium.


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Specification

Ultra wide band applicationranges in between-- 3.1GHz -10.6GHz.

Lowvoltageofoperationwith -- 1.8-v.

Technologywhich usedis-- 0.18umcmos.

Conversiongain-- 4dB ormorein 1.8-v.

IIP3 (Thirdorderintercept point)morethan -10dBm

1dB compression pointmorethan -7dBm

Output Noise - >-120dB

S11 parameter-- -5dB ormorenegative S22 parameter-- -5dB ormorenegative


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BASICS OF GILBERT MIXER

WIDELY USED IN COMMUNICATION SYSTEMS.

GILBERT MIXER PERFORMS A VOLTAGE TO CURRENT CONVERSION OF RF

SIGNAL MODIFIED BY LO SIGNALS.

ADVANTAGE OVER OTHER MIXERS IS THAT IT MIX LESS NOISE IN MIXED

SIGNAL.

ALL PORTS OF THE MIXER ARE INHERENTLY ISOLATED FROM EACH OTHER.

LESS SUSCEPTABLE TO SUPPLY VOLTAGE NOISE DUE TO DIFFRENTIAL

TOPOGRAPHY.


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DESIGN GUIDLINE

The RF signal is applied to the transistors

M2 & M3 which perform a voltage to current

conversion.

These M2 & M3 are working in saturation so

it is providing gain for mixer.

MOSFets M4 to M7 Perform a multiplication

function.

The two load resistors form a current to

voltage trans-formation giving differentialoutput IF signals.


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Basic Design


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Modifieddesign


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Final Modification


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Mixerwith Test Bench


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S11 - Parameter


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S22- Parameter


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Conversion Gain


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1dB- Compression point


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IIP3- Using QPSS and QPAC


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Output Noise


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Comparisonof Results

Required Circuit Results

Gain >4dB 4.25dB

Output Noise most negative -152.5 dBm

1dB compression >-10dB - 7.2dBm

3rd Order intercept >-3dB -10.336dBm

S11 parameter >5dB -5.3dB

S22 parameter >5dB -5.6dB


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Just Few Days Ago In BasicCircuitGain


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Conclusion

Now these results still waiting for more improvement

over Power Consumption of the circuit further that Layout

and Post Layout will perform.


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THANK YOU

Design and Analysis of Ultra-wide Band Mixer

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