Bias current generators with wide dynamic range

  • Delbrück T
  • Van Schaik A
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Abstract

This paper describes CMOS circuits that generate a wide- ranging set of fixed bias currents, spanning at least 6 decades down to picoamperes. A master current generated by a bootstrapped current reference is successively divided by a current splitter to generate the desired references. An unpublished startup circuit and a novel power control mechanism are described. Measurements from a 0.35u implementation are presented and non- idealities are investigated. Readers are directed to a design kit that makes it simple to generate the layout for a bias generator with a set of desired currents for scalable MOSIS CMOS processes.

Author-supplied keywords

  • Bias current generator
  • Current divider
  • Current reference
  • Current splitter
  • PTAT

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