Band gap reference circuit
First Claim
1. A band gap reference circuit, comprising:
- a first branch comprising a first transistor element and a first temperature dependent resistive element;
a second branch comprising a second transistor element having a size different from the first transistor element;
an output branch comprising an second temperature dependent resistive element, the second temperature dependent resistive element being coupled to an output terminal; and
a control element coupled to the first and second branch to control a current through the first and second branches;
wherein each of the first and second temperature dependent resistive elements, comprises a transistor, whose controlled section is arranged in a current path of the respective branch and is controlled such that it operates in its linear region of its characteristics,wherein the first temperature dependent element comprises a first current mirror, the first current mirror comprising a first input transistor and a first mirror transistor, andwherein the second temperature dependent resistive element comprises a second current mirror, the second current mirror comprising a second input transistor and a second mirror transistor.
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Accused Products
Abstract
A band gap reference circuit comprises a first branch (1) having a first transistor (Q1) and a first temperature-dependent resistive element (S0). A second branch of the band gap reference comprises a second transistor (Q2) having a different size compared to the first transistor (Q1). An output branch (3) comprises a second temperature-dependent resistive element (S1, S2), that second temperature-dependent resistive element being coupled to an output terminal (Vref). At least one of the first and second temperature-dependent resistive elements (S0, S1, S2) comprises a transistor (M2) being arranged in a current path of the respective branch (1, 3) and being controlled such that it operates in a linear region of its characteristics.
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Citations
19 Claims
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1. A band gap reference circuit, comprising:
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a first branch comprising a first transistor element and a first temperature dependent resistive element; a second branch comprising a second transistor element having a size different from the first transistor element; an output branch comprising an second temperature dependent resistive element, the second temperature dependent resistive element being coupled to an output terminal; and a control element coupled to the first and second branch to control a current through the first and second branches; wherein each of the first and second temperature dependent resistive elements, comprises a transistor, whose controlled section is arranged in a current path of the respective branch and is controlled such that it operates in its linear region of its characteristics, wherein the first temperature dependent element comprises a first current mirror, the first current mirror comprising a first input transistor and a first mirror transistor, and wherein the second temperature dependent resistive element comprises a second current mirror, the second current mirror comprising a second input transistor and a second mirror transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A band gap reference circuit, comprising:
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a first branch comprising a first transistor element and a first temperature dependent resistive element; a second branch comprising a second transistor element having a size different from the first transistor element; an output branch comprising a second temperature dependent resistive element, said second temperature dependent resistive element being coupled to an output terminal; and a control element coupled to the first and second branch to control a current through the first and second branches; wherein said first temperature dependent resistive element comprises a first current mirror, said first current mirror comprising a first input transistor and a first mirror transistor, wherein each control terminal of both said first input transistor and said first mirror transistor is coupled to a terminal of said first input transistor; and wherein said second temperature dependent resistive element comprises a second current mirror, said second current mirror comprising a second input transistor and a second mirror transistor, wherein each control terminal of both said second input transistor and said second mirror transistor is coupled to a terminal of the second input transistor; and wherein each controlled section of each mirror transistor is arranged in a current path of the respective branch. - View Dependent Claims (19)
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Specification