The paper details on-chip inductor optimization for a reconfigurable continuous-time delta-sigma (Δ-Σ) modulator based radio-frequency analog-to-digital converter. Inductor optimisation enables the Δ-Σ modulator with Q enhanced LC tank circuits employing a single high Q-factor on-chip inductor and lesser quantizer levels thereby reducing the circuit complexity for excess loop delay, power dissi...

—A method is developed to use a single set of two-dimensional numerical optimizations of inductor winding shapes to simply calculate the optimal winding configuration for any design on the same core without repeating the computationally intensive numerical optimization. For transformer windings, the results are consistent with previous one-dimensional optimizations, but for inductor windings, a...

Abs t rac t -The phys ica l s ize of inductors in resonant converters was examined i n terms o f inductor t o transformer s i z e rat io . F o l l o w i n g the general d i scuss ion o f the i s s u e , the inductor s i z e i n ser i e s resonant DC-DC converter i s examined i n deta i l . It i s shown that the inductor t o transformer s i z e rat io i s a funct ion of the peak v o l t a g e o ...

Inductive power transfer is the most common method for transferring power to implantable sensors inside human body. For good inductive coupling, the inductors should have high inductance and high quality factor. But the physical dimension of the receiver inductor cannot be large due to biomedical constraints. Therefore, there is a need for small size and high inductance, high quality factor ind...

This work introduces a tool for the optimization of CMOS integrated spiral inductors. The main objective of this tool is to offer designers a first approach for the determination of the inductor layout parameters. The core of the tool is a Genetic Algorithm (GA) optimization procedure where technology constraints on the inductor layout parameters are considered. Further constraints regarding in...

Abstract: Design, simulation, and implementation of microstrip spiral inductors for RF applications at the high frequency (HF) range are given. The simplified lumped element equivalent model parameters for spiral inductor are used to obtain the initial physical dimensions for the design. The spiral inductor is then simulated with planar electromagnetic simulator, Sonnet, using the geometry cons...

Other than by reducing power, extending battery life in portable microelectronics amounts to increasing power efficiency, which when coupled with accuracy, translates to increasing filter inductance. The problem with higher inductances is magnetic cores require more space to prevent the onset of saturation, so accuracy and efficiency (via their need for bulky inductors) hamper the miniaturizati...

In this paper, deep sub-micron CMOS process compatible high Q on chip spiral inductors with air gap structure were designed and fabricated. In the design the electromagnetic solver, SONNET, and the finite element program, ANSYS, were used for electrical-characteristics and maximum mechanical strength, respectively. The copper wires were capped with electroless Ni plating to prevent the copper f...

Four-turn coupled (flux-closed) inductor structures have been fabricated and tested for use in high-power-density integrated voltage regulator (IVR) applications. Our solenoid-like structure is comprised of a laminated magnetic core of four rungs surrounded by four Cu windings creating four coupled inductors. The magnetic core is made of laminations of ultra-high-vacuum-sputtered [5 nm Ta/200 n...

This paper presents the design and modeling, fabrication and characterization of suspended spiral inductors on silicon substrate. The substrate materials underneath the inductor coil are removed by micromachining process to reduce the substrate loss which enables high frequency operation. A complete Library of spiral inductors with different line width, line spacing and number of turns have bee...