Patent ID: 8384157
Filing Date: 2013-02-26
Classification: H01L

Abstract:
1. An integrated circuit comprising: a resistor body of a first conductivity type; a first terminal and a second terminal positioned away from the first terminal, each of the first terminal and the second terminal making direct electrical contact with the resistor body at a first contact region and a second contact region, respectively, of the resistor body, the first contact region being positioned at a first end of the resistor body and the second contact region being positioned at a second end of the resistor body opposite the first end; a doped well of a second conductivity type substantially surrounding the resistor body on all but one major surface of the resistor body, the doped well having a third contact region positioned on the doped well adjacent the first end of the resistor body and a fourth contact region positioned on the doped well adjacent to the second end of the resistor body; a first amplifier electrically connected to the first terminal and to the third contact region, an output of the first amplifier electrically connected to the doped well without an intervening voltage source; and a second amplifier electrically connected to the second terminal and to the fourth contact region, an output of the second amplifier electrically connected to the doped well without an intervening voltage source, wherein the first amplifier and the second amplifier are connected for power supply only to the first terminal and second terminal, respectively; wherein said third contact region and said fourth contact region are biased by said first amplifier and said second amplifier, respectively, with a biasing voltage that is substantially equal to a voltage at said first and second terminals.