Low voltage differential amplitude driver with high power supply noise suppression ratio

Low voltage differential amplitude driver with high power supply noise suppression ratio

  • CN 1,805,285 A
  • Filed: 01/14/2005
  • Published: 07/19/2006
  • Est. Priority Date: 01/14/2005
  • Status: Active Application
First Claim
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1. , a kind of low voltage differential amplitude driver of high-power supply noise rejection ratio is characterized in that comprising:

  • One first current source is connected in a high workload supply voltage, and one first operating current is provided;

    One switch element, have one first signal end and a secondary signal end, and receive first operating current that aforementioned first current source is provided, and determine the outbound course of an output current at this first signal end and this secondary signal end according to one first input signal and one second input signal;

    One second current source is connected in an aforementioned switches unit and a low working power voltage;

    One common mode back coupling unit produces a common mode control signal according to aforementioned first signal end of aforementioned switches unit and the voltage of secondary signal end;

    One common mode impedance unit, in parallel with aforementioned second current source, and by aforementioned common mode control signal controlling resistance value;

    AndOne compensating unit, in parallel with aforementioned second current source, and be used for compensating aforementioned first current source and change because of the electric current that power supply noise produced.

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