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 unique specialise in 1V circuit implementations. The emphasis is on excessive linearity voltage-to-current blocks for instant and wireline functions, and the designs disguise as much as very excessive velocity specifications.
1V CMOS Gm-C Filters: layout and Applications starts off with a basic advent to the strategies of transconductors. The assessment of the final architectures is equipped, starting from shunt suggestions to floating gate topologies. various transconductors in line with nano-scale applied sciences are mentioned with specific attentions to the quick channel impression. The performances are optimized whereas taking pace, linearity and gear intake under consideration. The implementation of the Gm-C filter out is brought following the transconductors. The clear out synthesis and non-ideal results attributable to 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 save lots of chip region. the objective functions are IEEE 802.11a/b/g instant LANs, Wideband CDMA, cdma2000, and Bluetooth. in addition, the excessive pace clear out required for pulse sign interface can be mentioned. numerous excessive pace filters are carried out with systematic layout strategies. The layout and dialogue of computerized tuning platforms are integrated as well.
1V CMOS Gm-C Filters: layout and Applications presents a transparent creation of low voltage architectures and yields perception into the impression of circuit non-idealities. The absolutely CMOS implementation can be valuable for instant and wireline functions. the fundamental layout suggestions might be simply built in the course of the representation of this ebook. This booklet might be supplied for engineers and researchers who're attracted to the transconductor and Gm-C clear out. it's also a great reference for the direction regarding analog built-in circuit design.
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Additional info for 1V CMOS G m -C Filters: Design and Applications
If Q is set to 4 for less transconductance reduction, P should be set to 16, but such a large ratio would degrade the bandwidth performance owing to the large parasitic capacitance of input transistors. 27) The optimization procedure concludes that the third-order distortion component is ideally cancelled out with the expected transconductance value, as shown in Fig. 14. The linearity performance is actually robust to process variation owing to the flat distribution in Fig. 13. Thus, the small reduction in the transconductance value makes high linearity and high speed possible under about 30% of extra power consumption.
In the proposed structure, two different values of resistors, Ra and Rb , are used for each differential pair, and the source degenerated resistors are added up to simplify the expression. 3 60 DB IM3 The 40 MHZ Double Differential-Pair CMOS Transconductor With 17 where Vcm is the input common-mode voltage and Vid is the input differential-mode voltage. 21) where K1 D K2 , K3 D K4 , Rθ1 D Rθ2 , and Rθ3 D Rθ4 . 3;4/ . 24) where Wi , Li , and gmi are the width, length, and transconductance of the ith transistor, respectively, and Rθi is the ith short channel equivalent resistance.
Transconductance tuning is another important issue in the transconductor design. The main idea of the transconductance tuning is to compensate for the variation caused by the fabrication process and temperature. 14 shows the contour plot of the third-order harmonic component under transconductance tuning, resulting from Fig. 13. We can find that if Q is changed from 1 to 4 when P is set to 9, it implies more than 300% of the transconductance tuning range, as shown in Fig. 001 can be guaranteed, as illustrated in Fig.
1V CMOS G m -C Filters: Design and Applications by Tien-Yu Lo, Chung-Chih Hung (eds.)