Feedforward noise cancellation techniques Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/g732dc21n

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Supply noise is one of the major considerations in almost all analog building blocks. In the past, adequate supply rejection is usually achieved with circuit isolation or excess capacitive coupling. However, this brute force method requires large silicon area and degrades feedback bandwidth. In this study, a method of enhancing the power supply rejection (PSR) of a system by using a fast feedforward path to cancel the noise is investigated. This method is applied to a 25mA, 0.18μm low drop-out regulator (LDO) as well as a 1.5mW, 500MHz to 2.5GHz charge pump phase locked loop (PLL). Simulation results show that this feedforward noise cancellation (FFNC) method improves PSR of either system by at least 20dB up to a noise frequency of 10MHz. Measurement of the two prototype circuits that have been fabricated in National Semiconductors 0.18μm process show an improvement of at least 16dB in PSR at 10MHz. A background calibration method that is used to provide the correct gain for the FFNC is also designed and tested.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2010-12-06T19:26:57Z (GMT) No. of bitstreams: 1 YangBangda2010.pdf: 1824637 bytes, checksum: 58d9c89de1e978bd143f0858a316d6ea (MD5)
  • description.provenance : Made available in DSpace on 2010-12-06T23:49:04Z (GMT). No. of bitstreams: 1 YangBangda2010.pdf: 1824637 bytes, checksum: 58d9c89de1e978bd143f0858a316d6ea (MD5)
  • description.provenance : Submitted by Bangda Yang (yangba@onid.orst.edu) on 2010-12-06T02:03:48Z No. of bitstreams: 1 YangBangda2010.pdf: 1824637 bytes, checksum: 58d9c89de1e978bd143f0858a316d6ea (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2010-12-06T23:49:04Z (GMT) No. of bitstreams: 1 YangBangda2010.pdf: 1824637 bytes, checksum: 58d9c89de1e978bd143f0858a316d6ea (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items