Design considerations for fast-settling operational amplifiers Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mg74qp76z

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  • The design considerations for fast-settling operational amplifiers (opamps) differ significantly between sampled-data switchedcapacitor (SC) and conventional continuous-time applications. In SC circuits, the shape of the output voltage waveform of an opamp is of no consequence provided that the output settles to within a specified tolerance of its steady-state value prior to the next sampling instant. This feature allows for an optimum opamp frequency shaping to obtain a minimum small-signal settling time. The theory applies to any opamp that is well-approximated by a two-pole model, including the conventional two-stage and single-stage folded-cascode topologies. As the commonly-used equivalent-circuit Miller-effect model for frequency compensation has generally been improperly applied to two-stage transconductance amplifiers, it does not provide sufficient accuracy to achieve the optimum phase margin condition. Therefore, the use of equivalent-circuit models has been refined to provide greater accuracy and to eliminate some previous misconceptions.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-05-08T15:40:50Z (GMT) No. of bitstreams: 1 YangHowardC1990.pdf: 341385 bytes, checksum: 69b4353678633a0ab71f15dc71a6def1 (MD5)
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  • description.provenance : Made available in DSpace on 2013-06-27T22:05:44Z (GMT). No. of bitstreams: 1 YangHowardC1990.pdf: 341385 bytes, checksum: 69b4353678633a0ab71f15dc71a6def1 (MD5) Previous issue date: 1989-09-11
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-06-27T22:05:44Z (GMT) No. of bitstreams: 1 YangHowardC1990.pdf: 341385 bytes, checksum: 69b4353678633a0ab71f15dc71a6def1 (MD5)

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