Tunable spiral inductors pdf file

When used as a choke, a low q is generally desirable to obtain a broadband characteristic. Coupled spiral inductor for rf applications ipcsit. Active cmos tunable inductors have advantages over spiral inductors in terms of tunability, qfactor, and area. Variable inductors are available at mouser electronics. Lumped model showing a two layer, three turn spiral without a 23 ground shield all the coupling coefficients are not shown 8. These inductor structures have a 20 m line width, 2 m aluminum line thickness and 150 m inner diameter. A tunable microelectromechanical systems integrated inductor with a largedisplacement electrothermal actuator is discussed here. Pdf memristors have proven to be an attractive feature for memory, logicinmemory, and neuromorphic computing. This paper presents a practical architecture for a 2bit digitally tunable highq spiral inductor on standard cmos substrate utilizing surfacemicromachined electrostatically actuated microrelays. Tunable spiral inductors seminar report, ppt, pdf for. Memristor based planar tunable rf circuits world scientific. Niknejad master of philosophy in engineeringelectrical engineering and computer sciences university of california professor robert g. Since integrated spiral inductors have low factors that can range from 10 to.

Tunable inductors are generally classified into two main groups. Design of mems tunable inductor implemented on soi and. Tunable spiral inductors seminar report, ppt, pdf for applied. Based on a transformer configuration, the inductance of a spiral inductor is tuned by controlling the relative position of a magnetically coupled shortcircuited loop. Pdf for integrated radiofrequency applications, tunable magnetic inductors are expected. An example of the monolithic type is a planar microstrip spiral inductor which is an integral part of many radio frequency rf and microwave frequency circuits. Pdf design and modeling of a micromachined highq tunable. The tunability of the tunable spiral inductor 3 can be further improved using coupled spiral inductor shown in fig.

A fully integrated active inductor with independent voltage tunable. Lumped model showing a two layer, three turn spiral with a 28. Design and modeling of a micromachined highq tunable capacitor with large tuning range and a vertical planar spiral inductor. Two inductors were investigated, a spiral inductor over a glass wafer and a loops inductor over a soi wafer.

The high self resonance frequency allows the high tuning range. This tunability is achieved using tunable spiral inductor based on mem. For example, in spiral inductors, the capacitance of the substrate and between coils is the major limit of the selfresonance frequency. Spiral inductors are used extensively in microwave circuit resonant elements and as a choke in power supplies. Optically tunable spiral inductor for rf applications article in microwave and optical technology letters 461. This tunability is achieved using tunable spiral inductor based on memristive switches. Explore tunable spiral inductors with free download of seminar report and ppt in pdf and doc format. Evaluation and analysis of methods for fixed and variable. Featured items newest items bestselling alphabetical. Request pdf optically tunable spiral inductor for rf applications the tunability of an inductor using an additional conductor segments with optical switching is presented.

L43 tunable inductor coil forms l57 tunable inductor coil forms sort by. Optically tunable spiral inductor for rf applications. Section of an ic showing the different capacitances 24 7. Analysis, design, and optimization of spiral inductors and tra. Memsbased tunable meander inductor griffith research online. Design of tunable metamaterial based onchip spiral inductor.