Resistor circuit with temperature coefficient compensation

摘要

The present invention discloses a resistor circuit with temperature coefficient compensation, which comprises a first series resistor composed of a first resistor and a second resistor interconnected in series, and a second parallel resistor composed of a third resistor and a fourth resistor interconnected in series, with the first series resistor and the second parallel resistor interconnected in series, wherein the first resistor and the second resistor respectively have a positive and negative temperature coefficient and make the positive and negative temperature coefficients of the first series resistor offset each other, and the third resistor and the fourth resistor respectively have a positive and negative temperature coefficient and make the positive and negative temperature coefficients of the second parallel resistor offset each other. A secondary temperature coefficient compensation function is provided between the first series resistor and the second parallel resistor of the present invention, which can make the resistor circuit keep the temperature coefficient compensation function in any combination of process corner variations and able to achieve the high-precision resistance at any process corners.

主权项

1. A resistor circuit with temperature coefficient compensation, comprising a first resistor array and a second resistor array connected in series;
Wherein the first resistor array is composed of a first resistor and a second resistor interconnected in series, and the second resistor array is composed of a third resistor and a fourth resistor interconnected in parallel; wherein the first resistor and the third resistor have positive temperature coefficient, and the second resistor and the fourth resistor have negative temperature coefficient, wherein the first resistor array forms a first-order temperature compensation by the first resistor and the second resistor in series connection; the second resistor array forms a first-order temperature compensation by the third resistor and the fourth resistor connected in parallel; wherein the first resistor array and the second array interconnected in series form a second-order temperature compensation.