A High IIP2 Mixer Enhanced by a New Calibration Technique for Zero-IF Receivers

Vahidfar, M.B.; Shoaei, O.

doi:10.1109/tcsii.2008.918998

Cited by 30 publications

(10 citation statements)

References 7 publications

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“…The conversion gain and noise figure of the proposed mixer are the same as the conventional one. Table I summarizes the simulation results and compares the proposed mixer with several state-of-the-art linearized mixers [8,9,14] with the following figure-of-merit (FoM) [ …”

Section: Simulation Resultsmentioning

confidence: 99%

A high IIP2 and IIP3 CMOS down-conversion active mixer

Asghari

Yavari

2014

2014 22nd Iranian Conference on Electrical Engineering (ICEE)

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Two linearization techniques for double-balanced active mixers are introduced in this paper. The proposed techniques are based on cancelling the second-and third-order kernels of the transconductance stage output current. The second-order kernel is cancelled by adding a second-order intermodulation (IM2) current with an opposite sign generated by injecting a first-order term to the transconductance stage and also attenuating the third-order kernel of the transconductance current significantly by an improved form of the IM2 injection method. The proposed mixer has been designed for IEEE 802.11 applications with input frequency and output bandwidth equal to 2.4 GHz and 20 MHz, respectively, and simulated using a 90 nm RF-CMOS technology. Spectre-RF simulation results show that the proposed techniques have simultaneously improved IIP2 and IIP3 by approximately 26.7 dB and 21.4 dB, respectively, while only a 0.2 mA extra current is drawn from a 1.2 V power supply. In addition, the proposed techniques have no effect on the other parameters of the mixer such as the noise figure and conversion gain.

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Section: Simulation Resultsmentioning

confidence: 99%

A high IIP2 and IIP3 CMOS down-conversion active mixer

Asghari

Yavari

2014

2014 22nd Iranian Conference on Electrical Engineering (ICEE)

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“…IIP2 or IIP3. In addition, some of them use an inductor which occupies a large silicon area and also has radiation effects on other parts of the receiver [3,4,5]. In the proposed techniques, both of the linearity parameters have been improved without needing any inductor.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The leakage gain by which the IM2 term in the transconductance current appears at the output has been analyzed in [2]. The CM of IM2 current (I IM2,CM ) is leaked to the output and becomes differential and hence it is added to the differential IM2 output current as shown by the following equation [3]:…”

Section: Imgeneration Of Input Transconductance Stage and Switchesmentioning

confidence: 99%

A linearization technique for active mixers in zero-IF receivers with inherent balun

Barati

Yavari

2011

IEICE Electron. Express

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A new technique with two different structures for linearization of active mixers in zero-IF receivers is presented. The proposed technique improves the IIP2 more than 20 dB by removing the transconductance common mode current at the mixer's output and IIP3 more than 5 dB in comparison with a basic Gilbert-cell mixer at equal conversion gain. Also, this technique allows us to use a singleended input in a fully differential structure without needing a bulky and noisy balun. These improvements are achieved at the cost of 0.8 dB increase in NF and also 0.6 mA more current dissipation in one structure.

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“…The second order distortion was simulated with a Monte Carlo analysis [26,27] using a PSS ? PAC analysis.…”

Section: Specifications and Calculationsmentioning

confidence: 99%

A BiCMOS single ended multiband RF-amplifier and mixer with DC-offset and second order distortion suppression

Tired

2011

Analog Integr Circ Sig Process

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Direct conversion receivers are widely used for full duplex mobile radio communication systems. This paper describes a novel SAW-less single-ended RF amplifier connected to a single-ended mixer with a feedback loop that suppresses the second-order distortion from TX cross modulation of the LO-leakage as well as DCoffset at the mixer output. In Monte Carlo simulations the design achieves ?47 dBm minimum IIP 2 with 32 dB conversion voltage gain. The advantage with the proposed architecture is that it is fully single-ended. Especially in multiband integrated radios this is highly desirable since the pin-count for the LNAs is reduced by half. The PCB routing of the RF input signal is simplified. The design requires two off-chip filter capacitors of non critical value intended to be placed on the laminate inside the package.

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A High IIP2 Mixer Enhanced by a New Calibration Technique for Zero-IF Receivers

Cited by 30 publications

References 7 publications

A high IIP2 and IIP3 CMOS down-conversion active mixer

A high IIP2 and IIP3 CMOS down-conversion active mixer

A linearization technique for active mixers in zero-IF receivers with inherent balun

A BiCMOS single ended multiband RF-amplifier and mixer with DC-offset and second order distortion suppression

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