Variable Inductance Multilayer Inductor With MOSFET Switch Control

Park, Piljae; Kim, Cheon Soo; Park, Mun Yang; Kim, Sung Do; Yu, Hyun Kyu

doi:10.1109/led.2003.822670

Cited by 90 publications

(37 citation statements)

References 3 publications

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“…The most common approach toward discrete tuning, where only certain inductance values are achievable, is to have a set of pre-defined coils where switches select which coils are incorporated into the inductor. 2,3 This approach leads to compromised performance in the final tunable inductor since the switches add excessive resistance and also does not allow fine tuning desired for many RF applications such as channel selection.…”

Section: Introductionmentioning

confidence: 99%

Bubble inductors: Pneumatic tuning of a stretchable inductor

Lazarus

Bedair

2017

AIP Advances

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From adaptive matching networks in power systems to channel selectable RF filters and circuitry, tunable inductors are fundamental components for circuits requiring reconfigurability. Here we demonstrate a new continuously tunable inductor based on physically stretching the inductor traces themselves. Liquid-metal-based stretchable conductors are wrapped around a pneumatic bubble actuator, allowing the inductor to be collapsed or expanded by application of pressure. In vacuum the bubble collapses, bringing the loop area to nearly zero, while positive pressure brings a dramatic increase in area and loop inductance. Using this approach, the inductor demonstrated in this work was able to achieve a tuning ratio of 2.6 with 1-2 second response time. With conductors available that can stretch by hundreds of percent, this technique is promising for very large tuning ratios in continuously tunable inductors.

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Section: Introductionmentioning

confidence: 99%

Bubble inductors: Pneumatic tuning of a stretchable inductor

Lazarus

Bedair

2017

AIP Advances

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“…Efforts have been devoted to developing electronically tunable inductors that have large tunability, high Q-factor, and low energy consumption. For example, microswitches (Park et al 2004) or microrelays (Zhou et al 1999) were utilized to increase or decrease the effective coil length of the inductor, thus to change the inductance of the inductors. But the combination of the microswitches or micorelays reduced much Q-factor of the inductors.…”

Section: Introductionmentioning

confidence: 99%

Electrostatically driven tunable radio frequency inductor

Fang

Yuan

et al. 2010

Microsyst Technol

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An electrostatically driven tunable radio frequency (RF) inductor with large inductance tuning range consisting of electroplated soft magnetic permalloy (Ni 80 Fe 20 alloy) plate was proposed in this paper. The fabricated tunable inductor exhibits a large tunable inductance range up to 77.8%, together with improved quality factor (Q-factor) at high frequencies. Such tunability of inductance and Q-factor was due to the magnetoelectric coupling effect between the soft magnetic permalloy plate and the spiral inductor, which lead to the magnetic flux of the inductor and mutual inductance change. The concept of tuning inductance by using electroplated soft magnetic permalloy has large potential for wide range RFIC applications.

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“…Critical RF circuits such as low noise amplifiers (LNA) [1][2][3] and voltage controlled oscillators [4] can require low-loss switchable passive components. Switchable integrated spiral inductors have recently been investigated for integrated wireless circuits [2,3,[5][6][7]. For on-chip integration, a particularly promising switchable inductor configuration switches between several different ports in a standard spiral inductor structure as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…For on-chip integration, a particularly promising switchable inductor configuration switches between several different ports in a standard spiral inductor structure as depicted in Fig. 1 to provide several different inductance values [2,6,7]. The switch fabric that selects the ports in the inductor structure can be realized using either MEMS [7] or MOSFETs [2,6].…”

Section: Introductionmentioning

confidence: 99%

Design optimization of switchable multi-port spiral inductors

Nieuwoudt

Massoud

2007

Analog Integr Circ Sig Process

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In this paper, we develop a design optimization methodology for switchable multi-port spiral inductors in fully integrated wireless systems. The methodology simultaneously maximizes the inductor's performance for multiple inductance values and operating frequencies.We utilize multi-level optimization techniques to efficiently design the geometry of the switchable inductor structure. The methodology can produce designs with significantly larger quality factors than those obtained by optimizing the inductor design for a single inductance value and operating frequency.

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Variable Inductance Multilayer Inductor With MOSFET Switch Control

Cited by 90 publications

References 3 publications

Bubble inductors: Pneumatic tuning of a stretchable inductor

Bubble inductors: Pneumatic tuning of a stretchable inductor

Electrostatically driven tunable radio frequency inductor

Design optimization of switchable multi-port spiral inductors

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