A radio-frequency CMOS active inductor and its application in designing high-Q filters

Xiao, Haiqiao; Schaumann, R.; Daasch, W.R.; Wong, Phillip; Pejčinović, Branimir

doi:10.1109/iscas.2004.1328974

Cited by 21 publications

(6 citation statements)

References 6 publications

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“…A 5.7 GHz tunable filter in 0.18 μm CMOS technology has been presented in [29] in 2004. The simplified and detailed schematics of the active inductor, based on the gyrator approach, are shown in Figure 73.…”

Section: Active Inductance Filtersmentioning

confidence: 99%

“…The simplified and detailed schematics of the active inductor, based on the gyrator approach, are shown in Figure 73. The non-inverting transconductance is implemented A 5.7 GHz tunable filter in 0.18 µm CMOS technology has been presented in [29] in 2004. The simplified and detailed schematics of the active inductor, based on the gyrator approach, are shown in Figure 73.…”

Section: Active Inductance Filtersmentioning

confidence: 99%

“…Figure 74. The structure of the complete filter (a) and the measured transfer function (b) of the complete filter from [29].Reproduced with permission from[29].…”

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confidence: 99%

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A Survey of MMIC Active Filters

et al. 2021

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High-Q filters are a critical component in many systems. However, high-Q filters require very low-loss passive elements that are not compatible with monolithic technology. Therefore, filters are often implemented as off-chip components. Tunable high-Q filters require even larger space and weight, and are usually quite bulky. Active filters have been proposed in the past for a monolithic implementation. However, it is not easy to fulfil such requirements as a high dynamic range, low power consumption, low noise, wide tunability, stability, etc. With this study, we propose a survey of the main solutions presented in the literature, investigating the fulfilment of all or most requirements and their potential applications and feasibility, to be used in practical applications.

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Section: Active Inductance Filtersmentioning

confidence: 99%

Section: Active Inductance Filtersmentioning

confidence: 99%

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A Survey of MMIC Active Filters

et al. 2021

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“…Generally, there are two categories of active tunable filters. Firstly, a resonator tunable filter based on gyrator active inductor [53] as shown in Figure 8a. The design produces a parallel active inductor with C c and with a voltage gain e o /e i .…”

Section: Active Reconfigurable Filtersmentioning

confidence: 99%

Recent Progress in the Design of 4G/5G Reconfigurable Filters

et al. 2019

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Currently, several microwave filter designs contend for use in wireless communications. Among various microstrip filter designs, the reconfigurable planar filter presents more advantages and better prospects for communication applications, being compact in size, light-weight and cost-effective. Tuneable microwave filters can reduce the number of switches between electronic components. This paper presents a review of recent reconfigurable microwave filter designs, specifically on current advances in tuneable filters that involve high-quality factor resonator filters to control frequency, bandwidth and selectivity. The most important materials required for this field are also highlighted and surveyed. In addition, the main references for several types of tuneable microstrip filters are reported, especially related to new design technologies. Topics surveyed include microwave and millimetre wave designs for 4G and 5G applications, which use varactors and MEMSs technologies.

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“…In fact, by using a standard process is not possible to realize passive inductors with associated both high value of inductance, high-Q and high self-resonance frequency, unless high-cost steps are introduced in the fabrication process. In order to satisfy the requirement in terms of selectivity required for radiofrequency applications, several active equivalent circuits, commonly called 'active inductances', have been investigated [1][2][3][4][5][6][7][8]. One of these is the Boot-Strapped Inductor (BSI) [8].…”

Section: Introductionmentioning

confidence: 99%

Advanced Model and RF-CMOS Design of the Boot-Strapped Inductor

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2007

2007 14th IEEE International Conference on Electronics, Circuits and Systems

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This paper reports a new advanced design of the active circuit named Boot-Strapped Inductor (BSI), which realizes an equivalent inductor with an high quality factor (Q). In particular, a new small-signal circuit model is proposed for an accurate design at high frequency in a modern RF CMOS process, also by taking into account the issues of an algorithmic and low-power consumption circuit design. A case study for 13-GHz low-power applications by using a standard for 90 nm CMOS process is reported. The BSI provides an equivalent inductance close to 1.6 nH with an associated quality factor Q close to 200.

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A radio-frequency CMOS active inductor and its application in designing high-Q filters

Cited by 21 publications

References 6 publications

A Survey of MMIC Active Filters

A Survey of MMIC Active Filters

Recent Progress in the Design of 4G/5G Reconfigurable Filters

Advanced Model and RF-CMOS Design of the Boot-Strapped Inductor

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