Subthreshold CMOS active inductors with applications to low-power injection-locked oscillators for passive wireless microsystems

Zhou, Yushi; Yuan, Fei

doi:10.1109/mwscas.2010.5548661

“…In addition, the work that explores the intrinsic relation between large impedance variations of active inductors and the lock range of injection-locked active inductor oscillators is completed. The theoretical findings and the demonstrated example result in good understanding of improving the lock range of injection-locked oscillators in terms of design parameters [117,118,119].…”

Section: Discussionmentioning

confidence: 99%

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Zhou¹

2021

Preprint

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This thesis provides a theoretical and experimental study of injection locking and reconfigurable charge-domain sampling mixers and filters for data communications over wireless channels. On injection-locking, the intrinsic relation between the characteristics of injection signals such as sinusoidal or square, single-tone or multi-tone, the type of oscillators under injection such as harmonic oscillators (passive or active LC oscillators) or non-harmonic oscillators (ring or relaxation oscillators), and the lock range of the oscillators under injection was investigated. For the very first time, we discovered the intrinsic relation between the lock range and the phase of multiple injections of harmonic oscillators. In addition, we obtained the closed-form expression of the lock range of harmonic oscillators with square-wave injections. Moreover, we obtained the distinct characteristics of the lock range of harmonic and non-harmonic oscillators and that of different types of non-harmonic oscillators. These theoretical findings were not known before and were validated using simulation results. On reconfigurable charge-domain sampling mixers and filters for software-defined radio, a novel quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters was developed. An in-depth investigation of the principles of periodic impulse sampling, periodic windowed sampling, and periodic N-path windowed sampling was presented and a detailed mathematical treatment of charge-domain windowed samplers with built-in sinc, FIR and IIR filters was provided. The proposed quadrature charge-domain sampler with embedded FIR, IIR, and 4-path band-pass filters was implemented in IBM 130 nm 1.2V CMOS technology and its performance was validated both using simulation results and on-wafer measurement.

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“…In addition, the work that explores the intrinsic relation between large impedance variations of active inductors and the lock range of injection-locked active inductor oscillators is completed. The theoretical findings and the demonstrated example result in good understanding of improving the lock range of injection-locked oscillators in terms of design parameters [117,118,119].…”

Section: Discussionmentioning

confidence: 99%

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Zhou¹

2021

Preprint

Self Cite

0

View full text Add to dashboard Cite

This thesis provides a theoretical and experimental study of injection locking and reconfigurable charge-domain sampling mixers and filters for data communications over wireless channels. On injection-locking, the intrinsic relation between the characteristics of injection signals such as sinusoidal or square, single-tone or multi-tone, the type of oscillators under injection such as harmonic oscillators (passive or active LC oscillators) or non-harmonic oscillators (ring or relaxation oscillators), and the lock range of the oscillators under injection was investigated. For the very first time, we discovered the intrinsic relation between the lock range and the phase of multiple injections of harmonic oscillators. In addition, we obtained the closed-form expression of the lock range of harmonic oscillators with square-wave injections. Moreover, we obtained the distinct characteristics of the lock range of harmonic and non-harmonic oscillators and that of different types of non-harmonic oscillators. These theoretical findings were not known before and were validated using simulation results. On reconfigurable charge-domain sampling mixers and filters for software-defined radio, a novel quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters was developed. An in-depth investigation of the principles of periodic impulse sampling, periodic windowed sampling, and periodic N-path windowed sampling was presented and a detailed mathematical treatment of charge-domain windowed samplers with built-in sinc, FIR and IIR filters was provided. The proposed quadrature charge-domain sampler with embedded FIR, IIR, and 4-path band-pass filters was implemented in IBM 130 nm 1.2V CMOS technology and its performance was validated both using simulation results and on-wafer measurement.

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“…However, to obtain adequate transconductance with sub-threshold bias, the device dimension has to be increased. This results high value device capacitance (mainly Cgs) and high output impedance and will degrade the wide band performance [14]. As a result, design of LNA with wideband input matching and broad-band gain performance becomes very difficult, while maintaining low power.…”

Section: Circuit Analysismentioning

confidence: 99%

A 1.5–7.5GHz low power low noise amplifier (LNA) design using subthreshold technique for Wireless Sensor Network (WSN) application

Kumar

¹

,

Dutta

²

,

Singh

³

2012

2012 IEEE International Symposium on Circuits and Systems

8

0

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A novel wide band low power low noise amplifier using subthreshold technique is presented in this paper. This LNA built with Common-Gate (CG) input stage for wide band input matching and a Common Source (CS) -Common Gate (CG) cascode stage for gain boosting. Power reduction is achieved by driving the front end CG transistor in sub-threshold region and input matching is done by LC circuit instead of traditional CG method (Rs=1/g m ). The circuit is simulated usingSpectra-RF simulator in 0.18µm CMOS technology, and achieved 13.5-14.5 dB (7.5 to 8.5 dB + 6dB loss in buffer) gain over entire band of 1.5-7.5GHz with a 5-10.5dB NF while consuming 4.9mW of power from 1.8V supply.I.

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Subthreshold CMOS active inductors with applications to low-power injection-locked oscillators for passive wireless microsystems

Cited by 10 publications

References 11 publications

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

A 1.5–7.5GHz low power low noise amplifier (LNA) design using subthreshold technique for Wireless Sensor Network (WSN) application

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Subthreshold CMOS active inductors with applications to low-power injection-locked oscillators for passive wireless microsystems

Cited by 10 publications

References 11 publications

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

A 1.5&#x2013;7.5GHz low power low noise amplifier (LNA) design using subthreshold technique for Wireless Sensor Network (WSN) application

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A 1.5–7.5GHz low power low noise amplifier (LNA) design using subthreshold technique for Wireless Sensor Network (WSN) application