A 1-V +31 dBm IIP3, Reconfigurable, Continuously Tunable, Power-Adjustable Active-RC LPF

Amir-Aslanzadeh, H.; Pankratz, Erik; Sánchez-Sinencio, E.

doi:10.1109/jssc.2008.2011037

Cited by 78 publications

(28 citation statements)

References 17 publications

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“…This requires specialized op-amp designs, where frequency compensation is also bias-dependent [20,21]. Other papers have also considered power consumption control issue [3,17]; switchable op-amps are proposed to reduce power consumption in [17].…”

Section: Circuit Techniques For Analogue Baseband Filtersmentioning

confidence: 99%

“…In the literature, Butterworth [2, 5-7, 17, 20, 23, 25, 28, 38, 41], Chebyshev [3,4,19,25,26,32,33,36], and elliptic [4,22,24,25,27,36,37,40] approximations all have been popularly used for baseband channel filters with the Butterworth type used more often due to the ease of design and simplicity in structure. Reference [3] also designs an inverse Chebyshev filter. A mixed use of different functions is also possible: for example, reference [7] uses a 6 th -order elliptic function for channel select and a 2 nd -order Butterworth function as prefilter.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

“…A mixed use of different functions is also possible: for example, reference [7] uses a 6 th -order elliptic function for channel select and a 2 nd -order Butterworth function as prefilter. Multiple frequency responses from a single reconfigurable filter structure can also be achieved such as Chebyshev/Inverse Chebyshev [3], Chebyshev/elliptic [36], and Butterworth/Chebyshev/ elliptic [25]. In some applications where linear phase or small group delay is required [3,36], Bessel response is also used [12,13].…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

“…Also, less complex lower-order filters can provide ease of design, have less noise and reduced parasitic effects. The order of filters adopted in the literature ranges from 3 rd [3,5,6,20,28,36] [4,7,33] order, with most using the 5 th -order to best trade off frequency response and circuit complexity. For multistandard receivers, references [3, 6, 20, and 36] have also presented an order-adaptable filter system which can realize 3 rd -and 5 th -order filters for different standards to reduce chip area and power consumption.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

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Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

Sun

Moritz

Zhu

2011

Circuits Syst Signal Process

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Analogue baseband filters are an important circuit for channel select and anti-aliasing in wireless and mobile communication systems. For software and cognitive radio, they must be widely tunable and reconfigurable to accommodate existing, emerging, and future wireless and mobile standards. In this paper, design considerations of tunable and programmable filters for highly integrated multistandard receivers are presented. General background of multistandard integrated receivers and design challenges of analogue baseband filters are given. Circuit techniques for baseband filter design including the widely used active-RC and Gm-C circuits are described. Filter structures and design methods for high-order baseband filters are reviewed. On-chip tuning issues and methods are discussed. Results and performances of some published design examples are summarized. Future directions are also pointed out.

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Section: Circuit Techniques For Analogue Baseband Filtersmentioning

confidence: 99%

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

See 2 more Smart Citations

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

Sun

Moritz

Zhu

2011

Circuits Syst Signal Process

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“…Nonetheless, one of the major drawbacks of continuous MOSFET-RC tuning is the linearity degradation due to the non-linear transistor behavior. In this work a tuning method with active feedback for structures of MOSFET-RC filter is proposed, which overcomes the linearity degradation problem when the filter is tuned over its bandwidth or Q settings and does not increase the noise generation as in the case of [12]. A low pass biquadratic filter cell is designed to test the proposed tuning structure.…”

Section: Introductionmentioning

confidence: 99%

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

Kiela

Navickas

2016

Journal of Electrical Engineering

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In this paper a tuning structure for a MOSFET?RC filters is presented. The proposed tuning structure is composed of switched resistor banks with voltage controlled transistors. The voltage controlled transistors use active feedback with extended control range for continuous filter parameter tuning, without degrading the total linearity performance of the filter.The proposed tuning structure is tested by implementing it in a second order low pass biquadratic filter cell in 65 nm CMOS technology. The designed filter has a highly reconfigurable response, ranging from Chebyshev to Bessel, a tuneable -3 dB bandwidth from 10 MHz to 100 MHz and can be used for multiple standard wireless solutions. Filter IIP3 performance is not degraded when the bandwidth is continuously tuned by 40 % with a 1 V pp input. The maximum power dissipation, including active feedback circuits, is 17.2 mW from a 1.2 V source when the filter is tuned to 100 MHz bandwidth.

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Bandwidth extension, linearity enhancement, and cost reduction techniques for continuous‐time channel‐select filters

Mojarad

Kamarei

2016

Circuit Theory & Apps

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Summary Achieving a wide bandwidth in a conventional active‐RC filter requires large power consumption and is often accompanied by significant performance degradation. In this paper, a new structure to implement active‐RC continuous‐time filters and also a new frequency compensation scheme for the operational amplifiers that are the main building blocks of active‐RC filters are proposed. Exploiting these techniques increases the maximum possible bandwidth with lower power consumption in comparison with the conventional architectures, reduces die area, and enhances the dynamic range. The effectiveness of these methods has been verified by analysis and simulation of the conventional and proposed filters under identical conditions. Both the analytical investigations and extensive simulation results prove that the adopted techniques improve the performance of continuous‐time filters considerably in terms of bandwidth and linearity while reducing the die area. Simulations have been carried out in a standard 90‐nm CMOS process by using Advanced Design System (ADS), and the proposed filter features 11.08‐dB spurious‐free dynamic range improvement and 5.9 times bandwidth enhancement. Also, the total on‐chip capacitance is made 2.4 times smaller by using the new biquad structure. Copyright © 2016 John Wiley & Sons, Ltd.

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A 1-V +31 dBm IIP3, Reconfigurable, Continuously Tunable, Power-Adjustable Active-RC LPF

Cited by 78 publications

References 17 publications

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

Bandwidth extension, linearity enhancement, and cost reduction techniques for continuous‐time channel‐select filters

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