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COMPENSATION CAPACITOR NETWORK FOR DIVIDED DIFFUSED RESISTORS FOR A VOLTAGE DIVIDER

  • US 20090153237A1
  • Filed: 12/12/2007
  • Published: 06/18/2009
  • Est. Priority Date: 12/12/2007
  • Status: Active Grant
First Claim
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1. An integrated circuit comprising:

  • a plurality of 2 or more diffused resistors arranged in series for a voltage divider, the voltage divider comprising;

    an output node;

    an input node coupled to an input voltage; and

    a reference node coupled to a voltage reference;

    a first diffused resistor having a first terminal and a second terminal, wherein the first diffused resistor is of a first semiconductor type and is disposed in a first well of a second semiconductor type, wherein the first terminal is coupled to the output node and wherein the second terminal of the third diffused resistor is coupled to the reference node;

    one or more diffused resistors in series between the input node and the output node, the one or more diffused resistors comprising at least;

    a second diffused resistor having a first terminal and a second terminal, wherein the second diffused resistor is of the first semiconductor type and is disposed in a second well of the second semiconductor type, wherein the first terminal and the second well are coupled to the input node, wherein the second terminal is coupled directly or indirectly to the output node and to the first terminal of the first diffused resistor;

    at least one explicit capacitor having a first terminal and a second terminal, wherein the first terminal is coupled to the input node, and wherein the second terminal is coupled to another node such that the at least one explicit capacitor is in parallel with at least a portion of the one or more diffused resistors in series between the input node and the output node and is not in parallel with the first diffused resistor.

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