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Transimpedance amplifier for optical receivers

  • US 4,498,001 A
  • Filed: 07/26/1982
  • Issued: 02/05/1985
  • Est. Priority Date: 07/26/1982
  • Status: Expired due to Term
First Claim
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1. A transimpedance amplifier for converting an optical signal to an electrical signal comprising:

  • an amplifying means with an input and output,means for receiving the optical signal and converting it to a current with AC and DC components, the optical receiving means being connected to the input of the amplifying means,means for comparing a voltage at the output of the amplifying means to a preset reference voltage,means responsive to the comparing means for providing an impedance between the input of the amplifying means and a ground reference level,means comprising a current mirror for sensing the DC component of the current,means comprising a current mirror responsive to the sensing means for diverting the DC component of the current away from the input of the amplifying means, through the impedance means, andthe impedance means being responsive to the comparing means to divert the AC component of the current to ground.

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