Download Design and Analysis of Spiral Inductors by Genemala Haobijam, Roy Paily Palathinkal PDF

By Genemala Haobijam, Roy Paily Palathinkal

The e-book addresses the serious demanding situations confronted by way of the ever-expanding instant verbal exchange marketplace and the expanding frequency of operation as a result of non-stop innovation of excessive functionality built-in passive units. The demanding situations like low caliber issue, layout complexity, manufacturability, processing expense, etc., are studied with examples and specifics. Silicon on-chip inductor used to be first stated in 1990 through Nguyen and Meyer in a 0.8 μm silicon bipolar complementary steel oxide semiconductor know-how (BiCMOS). due to the fact that then, there was a massive development within the learn at the functionality traits, layout and optimization, modeling, caliber issue enhancement concepts, etc., of spiral inductors and important effects are said in literature for varied purposes. This publication introduces an effective approach to opting for the optimized format of on chip spiral inductor.

The vital primary tradeoffs of the layout like caliber issue and quarter, caliber issue and inductance, caliber issue and working frequency, greatest caliber issue and the height frequency is additionally explored. The authors proposed an set of rules for actual layout and optimization of spiral inductors utilizing a 3D electromagnetic simulator with minimal variety of inductor constitution simulations and thereby lowering its lengthy computation time. a brand new multilayer pyramidal symmetric inductor constitution is usually proposed during this e-book. Being multilevel, the proposed inductor achieves excessive inductance to region ratio and accordingly occupies smaller silicon area.

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Example text

The Q max depends on the number of turns. As the number of turns increases from 3 to 4, initially Q max increases but beyond 4, Q max decreases. 21 for N = 4. The f max obtained for N = 4 also was maximum. As the number of turns increases, keeping the inductance constant, the inner and outer diameters reduce decreasing the area and increasing the total length of the spiral as observed in the previous section. Because of the smaller inner diameter, magnetic fields of the adjacent outer turns will pass through some of the innermost turns, inducing eddy current loops.

Because of the fixed area assumption, some possible structures with very large metal widths may not be included. For optimization of inductors at frequencies less than their peak frequency, the quality factor may be lower as compared to an optimization schedule without any area limitation. The graphical information can be summarized as: (i) For a specified area the range of inductance values that can be realized by each combination of turn, N and width W is obtained. (ii) For any desired value of inductance, the bounds on the number of turns, width, and diameter is obtained.

IEEE Trans. Electron Dev. 44(9) 1565–1567 (1997) 20 1 Introduction 60. : High-performance planar inductor on thick oxidized porous silicon (OPS) substrate. IEEE Microw. Guided Wave Lett. 7(8) 236–238 (1997) 61. : Isolation on si wafers by MeV proton bombardment for RF integrated circuits. IEEE Trans. Electron Dev. 48(5), 928–934 (2001) 62. : The modeling, characterization, and design of monolithic inductors for silicon RF IC’s. IEEE J. Solid State Circuits 32(3), 357–369 (1997) 63. : EM-simulation of planar inductor performance for epitaxial silicon processes.

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