Journal ArticleDOI
Third order integrable UHF bandpass filter using active inductors
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TLDR
In this paper, an UHF third order bandpass filter based on an high-Q active inductor (AI) is described and measurement results, performed on a prototype board, are presented and compared with software simulations.Abstract:
In this article, an UHF third order bandpass filter based on an high-Q active inductor (AI) is described and measurement results, performed on a prototype board, are presented and compared with software simulations. The designed AI includes a passive variable phase- and amplitude-compensating network and a highly linear inverting amplifier, forming a gyrator-C architecture that gives to the filter also frequency and amplitude tuneability proprieties. The fabricated Butterworth filter has a center frequency of 600 MHz and a measured noise figure of 11 dB with a 5 dBm 1-dB compression point and a 82 dB dynamic range. All passive components values have been chosen to allow the circuit to be completely integrated in a standard IC design. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1426–1429, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26857read more
Citations
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Proceedings Article
Monolithic narrow-band filter using ultrahigh-Q tunable active inductors
Stepan Lucyszyn,Ian D. Robertson +1 more
TL;DR: In this paper, a tunable active inductor is presented where the novel topology enables both the inductance and series resistance to be varied, and the measured performance for a monolithic 2 GHz filter achieves a mean insertion loss of 0.9 dB, passband ripple of ± 0.7 dB, with a 3 dB bandwidth of 70 MHz, and an excellent out-of-band rejection which exceeds 50 dB up to 18 GHz.
Journal ArticleDOI
Class AB tunable active inductor
TL;DR: In this paper, a class AB active inductor with high linearity, including a minimum number of components, is presented, and a prototype board on a TLX8 substrate is fabricated and tested showing the circuit feasibility for use in many commercial market applications, as integrated circuits, or discrete filters and oscillators.
Journal ArticleDOI
Fully differential DDA-based fifth and seventh order Bessel low pass filters and buffers for DCR radio systems
TL;DR: The fully differential fifth and seventh order Bessel low pass filters and buffers are completely based on a differential difference amplifier with common mode feedback capability, and have been designed with a tunable 100 kHz–1 MHz 6 dB bandwidth, in two steps.
Journal ArticleDOI
RF and microwave high‐Q floating active inductor design and implementation
TL;DR: A high-Q floating active inductor (FAI), suitable for RF and microwave applications, is presented, based on two cascaded pairs of highly linear capacitance gyrators, which provide a symmetric and reciprocal structure.
Journal ArticleDOI
Single transistor high linearity and wide dynamic range active inductor
TL;DR: An active inductor with high linearity and high dynamic range, including a minimum number of components, is presented.
References
More filters
Journal ArticleDOI
Wireless Power Transfer via Strongly Coupled Magnetic Resonances
Andre B. Kurs,Aristeidis Karalis,Robert Moffatt,John D. Joannopoulos,Peter H. Fisher,Marin Soljacic +5 more
TL;DR: A quantitative model is presented describing the power transfer of self-resonant coils in a strongly coupled regime, which matches the experimental results to within 5%.
Journal ArticleDOI
Analysis, Experimental Results, and Range Adaptation of Magnetically Coupled Resonators for Wireless Power Transfer
TL;DR: A circuit model is presented along with a derivation of key system concepts, such as frequency splitting, the maximum operating distance (critical coupling), and the behavior of the system as it becomes undercoupled, including the introduction of key figures of merit.
Journal ArticleDOI
Investigation of Adaptive Matching Methods for Near-Field Wireless Power Transfer
TL;DR: It is found that effective adaptive matching can be easily achieved by tracking the split resonant frequency of a wireless power transfer system, and a modified frequency tracking method is proposed to extend the range over which the power is transmitted with high efficiency.
Journal ArticleDOI
VHF CMOS integrated active inductor
TL;DR: In this article, the implementation of an RF CMOS active inductor is described, where the inductor loss is reduced by applying gain enhancement techniques based on cascoding, and the proposed new inductors exhibit lower loss, high self-resonance frequency and wider inductive region.
Journal ArticleDOI
RF bandpass filter design based on CMOS active inductors
TL;DR: In this paper, a second-order RF bandpass filter based on active inductor has been implemented in a 0.35 /spl mu/m CMOS process, which has 28dB spurious-free-dynamic-range (SFDR) and total current consumption (including buffer stage) is 17 mA with 2.7-V power supply.