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BIAS CURRENT GENERATOR

  • US 20090243711A1
  • Filed: 03/25/2008
  • Published: 10/01/2009
  • Est. Priority Date: 03/25/2008
  • Status: Active Grant
First Claim
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1. A bias current generator comprising:

  • a first amplifier having an inverting input, a non-inverting input and an output,a first bipolar transistor associated with one of the inverting and non-inverting inputs of the first amplifier,a load MOS device associated with the other one of the inverting and non-inverting inputs of the first amplifier,the load MOS device being driven by the first amplifier to operate in the triode region with a corresponding drain-source resistance ron, the first bipolar transistor and the load MOS device being arranged such that a voltage derived from the first bipolar transistor is developed across the drain-source resistance ron of the load MOS device thereby generating a bias current.

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