By Tien-Yu Lo, Chung-Chih Hung (eds.)
1V CMOS Gm-C Filters: layout and Applications discusses the layout points 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 purposes, and the designs disguise as much as very excessive pace specifications.
1V CMOS Gm-C Filters: layout and Applications starts off with a common advent to the ideas of transconductors. The evaluation of the overall architectures is equipped, starting from shunt suggestions to floating gate topologies. various transconductors in line with nano-scale applied sciences are mentioned with exact attentions to the fast 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 as a result of lively units are analyzed. 3 Gm-C filters are applied for channel choice in instant receivers, and all of those filters function less than a number of modes to save lots of chip zone. the objective functions are IEEE 802.11a/b/g instant LANs, Wideband CDMA, cdma2000, and Bluetooth. in addition, the excessive velocity clear out required for pulse sign interface can be mentioned. numerous excessive velocity filters are carried out with systematic layout approaches. The layout and dialogue of computerized tuning structures are incorporated 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 should be helpful for instant and wireline purposes. the elemental layout thoughts may be simply built throughout the representation of this publication. This booklet could be supplied for engineers and researchers who're drawn to the transconductor and Gm-C filter out. it's also a superb reference for the path concerning analog built-in circuit design.
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Additional resources for 1V CMOS G m -C Filters: Design and Applications
5 Experimental Results The proposed transconductor has been fabricated using the TSMC 180 nm Deep N-WELL CMOS process. Its operation and linear V-I characteristics have been studied. A micrograph of the linear transconductor is depicted in Fig. 18 and the occupied area is 15:1 10 3 mm2 . 5 mW. 5-V is sufficient for this circuit to operate under 180 nm CMOS process. For the measurement setup, the output signal of the signal generator was passed through a low-pass filter for the spectral purity of the input signal.
As the mechanism shown above, it is demonstrated that the common-mode control circuit can be implemented to achieve excellent stability over the tuning range. Moreover, linearity could be maintained by the robust and stable common-mode control system. The common-mode rejection (CMR) depends on matching. 1 C / between the CMFF path and the signal path, where is the mismatch ratio. 17;18/ is the transconductance of transistors M17 and M18, and go is the output conductance of the transconductor.
Thus, when fixed values of parameters are given, the aspect ratio of the compensated transistor can be found to achieve a highly linear voltage-to-current conversion. However, the main disadvantage of the modified circuit is the reduced transconductance. 3 The Modified Transconductor by Using Weak Inversion Transistors In order to keep the linearity performance with the maintained transconductance, the weak inversion transistors are used to replace the saturated transistors as shown in Fig. 31.
1V CMOS G m -C Filters: Design and Applications by Tien-Yu Lo, Chung-Chih Hung (eds.)