Offset correction circuit for voltage-controlled current source

Offset correction circuit for voltage-controlled current source

  • CN 101,147,424 B
  • Filed: 03/29/2005
  • Issued: 05/29/2013
  • Est. Priority Date: 03/29/2005
  • Status: Active Grant
First Claim
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1. circuit that produces output current comprises:

  • Current source, the response input voltage, with the output current of generation level of hope, andOff-centre correcting circuit is connected to described current source, is used for proofreading and correct the offset voltage that is applied to described current source, departs from level of hope to prevent output current,Wherein, described off-centre correcting circuit comprises differential pair of transistors and a pair of maintenance electric capacity, and the respective transistor that described a pair of maintenance electric capacity connects differential centering is used for keeping offset correction information.

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