Linearity improvement in a CMOS down-conversion active mixer for WLAN applications

Bijari, Abolfazl; Zandian, Salman

doi:10.1007/s10470-019-01482-2

Cited by 12 publications

(1 citation statement)

References 18 publications

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“…33 F I G U R E 1 0 Circuit using the IM2 injection method. 37 In addition, the postdistortion (PD) technology 38 is also commonly used to improve the linearity of the mixer. The auxiliary transistors are connected to the output port of the main transistors, allowing the nonlinearity produced by it to partially cancel the main transistor's nonlinearity.…”

Section: Optimized Linearitymentioning

confidence: 99%

Optimal design ofCMOSmixer: A research review

Zhang

Tang²,

Cai

et al. 2022

Int J RF Mic Comp-Aid Eng

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A mixer is an indispensable device in the RF transceiver system. Along with the rapid development of mobile communication technology, the demand on the RF mixer for compatibility with multiple communication standards and functional diversity is increasing. As a result, the mixer with wider bandwidth, lower noise, higher linearity, and less power consumption is urgently needed.In the article, the basic principle and the circuit architectures of the mixer are reviewed, including the essential performances such as linearity, noise, gain, bandwidth, and so forth. In addition, several aspects are presented, compared, and discussed with particular emphasis on optimization design approach and performance. Current design and fabrication challenges, future development, application areas of the mixer and visions for the mixer are also discussed in this review.

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Section: Optimized Linearitymentioning

confidence: 99%

Optimal design ofCMOSmixer: A research review

Zhang

Tang²,

Cai

et al. 2022

Int J RF Mic Comp-Aid Eng

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An Inductor‐Less Zero‐IF Down‐Conversion Mixer With Low Flicker Noise and High Conversion Gain

Mallaki,

Bijari

2024

Circuit Theory & Apps

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This paper presents a novel active inductor (AI) to improve the performance of a down‐conversion active mixer in terms of conversion gain (CG) and flicker noise. The proposed AI exhibits negative resistance and partially flat inductance over a wide frequency band of 0.5–4.5 GHz. The effect of inserting the AI between the source of the switching quad of a Gilbert cell mixer is theoretically analyzed. The proposed inductor‐less mixer, designed to operate at a 2.4‐GHz RF input frequency and a 10‐MHz IF output frequency, employs current reuse and self‐forward body bias (SFBB) techniques. The proposed circuit is simulated in Cadence Spectre‐RF using RF‐TSMC 0.18‐μm CMOS technology. Post‐layout simulations demonstrate that the proposed AI significantly reduces flicker noise by over 23 dB at an IF output frequency of 1 kHz and improves the CG by over 16 dB at an RF frequency of 2.4 GHz. The proposed mixer achieves a CG of 37.6 dB and a flicker noise corner frequency of 6 kHz. Additionally, it exhibits a third‐order intermodulation intercept point (IIP3) of −5.2 dBm and a double‐sideband noise figure (DSB‐NF) of 6.1 dB at the IF output frequency of 10 MHz. Operating with a 1.5‐V supply, the proposed mixer consumes 10.6 mW of power.

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