Download 1V CMOS G m -C Filters: Design and Applications by Tien-Yu Lo, Chung-Chih Hung (eds.) PDF

By Tien-Yu Lo, Chung-Chih Hung (eds.)

1V CMOS Gm-C Filters: layout and Applications discusses the layout facets of transconductor and Gm-C filter out circuits, with a distinct specialise in 1V circuit implementations. The emphasis is on excessive linearity voltage-to-current blocks for instant and wireline functions, and the designs hide as much as very excessive velocity specifications.

1V CMOS Gm-C Filters: layout and Applications starts off with a basic advent to the techniques of transconductors. The assessment of the overall architectures is supplied, starting from shunt suggestions to floating gate topologies. various transconductors in response to nano-scale applied sciences are mentioned with designated attentions to the quick channel impact. The performances are optimized whereas taking velocity, linearity and gear intake into account. The implementation of the Gm-C filter out is brought following the transconductors. The filter out synthesis and non-ideal results as a result of energetic units are analyzed. 3 Gm-C filters are carried out for channel choice in instant receivers, and all of those filters function lower than a number of modes to avoid wasting chip zone. the objective purposes are IEEE 802.11a/b/g instant LANs, Wideband CDMA, cdma2000, and Bluetooth. additionally, the excessive velocity filter out required for pulse sign interface is usually mentioned. a number of excessive pace filters are carried out with systematic layout approaches. The layout and dialogue of computerized tuning structures are integrated as well.

1V CMOS Gm-C Filters: layout and Applications offers a transparent creation of low voltage architectures and yields perception into the effect of circuit non-idealities. The absolutely CMOS implementation may be invaluable for instant and wireline purposes. the fundamental layout innovations might be simply built throughout the representation of this publication. This e-book may be supplied for engineers and researchers who're attracted to the transconductor and Gm-C clear out. it's also an exceptional reference for the path regarding analog built-in circuit design.

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It can be noticed that the transconductance tuning range is limited by the 22 2 Transconductor linear-region operation of transistors M5 to M8. Besides, the speed of the proposed transconductor is mainly limited by the parasitic capacitors caused by the current mirror circuits. 2 Common-Mode Stability The transconductor shown in Fig. 15 requires a proper common-mode control system due to the pseudo-differential structure [24]. The common-mode control system includes the common-mode feedforward (CMFF) circuit and the common-mode feedback (CMFB) circuit.

We can conclude that the low-voltage transconductor could be provided as a high linearity and high-speed building block in analog VLSI applications. 5 Linear CMOS Transconductor in Nano-Scale CMOS Technology In this section, high linearity MOSFET-only transconductor based on differential structures is presented. While a precise BSIM4 transistor model is introduced through analysis, the linearity can be improved by mobility compensation techniques as the device size is scaled down to the nano-scale CMOS technology.

31. 50) where Ww and Lw are the width and length of the device, respectively, Io is the process-dependent parameter, ζ is the weak inversion slope factor, and VT is the thermal voltage. Again, a Taylor series expansion is introduced while the voltage follower is well maintained, and then the voltage-to-current relationship can be expressed as Fig. 51) where a1;sub I0 D VT a3; sub D  Ww Lw e  I0 24 . VT / à 3 Vcm Vsf VT Ww Lw à e Vcm Vsf VT The third-order harmonic distortion term decreases with smaller device width and smaller input common-mode voltage.

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