Performance comparison of high-order IFLF and cascade analogue integrated lowpass filters

Chiang, D.H.; Schaumann, R.

doi:10.1049/ip-cds:20000057

Cited by 16 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the resultant drain current as a result of the short channel effect will cause I out to vary from its ideal expression as given in (4). Note that for short-channel lengths the λ parameter is larger than for long-channel lengths.…”

Section: Transconductance Amplifiermentioning

confidence: 99%

“…The ladder simulation method is not suitable for HDD design, because it can only directly realize transmission zeros on the imaginary axis, and converting the ladder filters into g m -C filters cost extra amount of power. The cascade topology can realize filters with arbitrary zeros, but the sensitivity is higher, with performance degradation particularly noticeable as filter order increases [4]. One of the solutions proposed for obtaining low passband magnitude sensitivity, non imaginary axis zeros and low power as required is to use multiple loop feedback (MLF) networks.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost

Zhu

Sun

Moritz

2008

2008 15th IEEE International Conference on Electronics, Circuits and Systems

View full text Add to dashboard Cite

???This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." ???Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.???A 400MHz CMOS seventh-order linear phase gm-C filter based on current-mode (CM) follow-the-leader-feedback (FLF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) based on source degeneration topology. PSpice simulations in a standard TSMC 0.18mum CMOS process and with 2.5V power supply have shown that the cut-off frequency of the filter ranges from 290MHz to 430MHz and dynamic range is about 54dB. The group delay ripple is approximately 6% over the whole tuning range and total power consumption is only 78.7mW at 400MHz cut-off frequency

show abstract

Section: Transconductance Amplifiermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost

Zhu

Sun

Moritz

2008

2008 15th IEEE International Conference on Electronics, Circuits and Systems

View full text Add to dashboard Cite

show abstract

“…Disadvantages are that the types of response that can be realized are limited to those that can be implemented as a passive ladder filter, and some filter realizations (e.g., for elliptic-type responses) are quite complex. • Multiple loop feedback (MLF) filters [8,14,16,34,[39][40][41] are a very general class of active filter, of which second-order cascades and ladder simulations could be considered a subset. An all-pole MLF filter consists of a cascade of active integrators with multiple feedback paths between integrators.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

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

Sun

Moritz

Zhu

2011

Circuits Syst Signal Process

View full text Add to dashboard Cite

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.

show abstract

“…Now let us turn to differential system (1), (2). According to (14) we shall assume that filter transconductors G i j , G bi , G ci , G d and G o are modeled as follows:…”

Section: S Kozielmentioning

confidence: 99%

Analysis of OTA‐C filters with weakly nonlinear transconductors

Koziel

2007

Circuit Theory & Apps

View full text Add to dashboard Cite

SUMMARYAn efficient approach for analysis of nonlinear distortion in OTA-C filters with weakly nonlinear transconductors is presented. The procedure is developed based on an algebraic description of a general OTA-C filter structure and, therefore, the results are valid for any filter architecture within OTA-C class. On the basis of the proposed method, explicit formulas for calculating a gain compression/expansion ratio in an arbitrary OTA-C filter are developed. The formulas are easy to implement and use in computer-aided filter design tools. For illustration purposes, several filter structures are considered. The accuracy of the method is verified by comparing the results with the exact values of gain compression/expansion ratio achieved by integrating the differential system that determines the time response of OTA-C filter. The presented approach can be generalized in order to consider other nonlinear parameters.

show abstract

Performance comparison of high-order IFLF and cascade analogue integrated lowpass filters

Cited by 16 publications

References 21 publications

A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost

A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost

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

Analysis of OTA‐C filters with weakly nonlinear transconductors

Contact Info

Product

Resources

About