Voltage regulator with different inverting gain stages
First Claim
1. A voltage regulator comprising:
- a regulating transistor having a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode; and
a control circuit having an output coupled to the control electrode of the regulating transistor, and an input coupled to the first current electrode of the regulating transistor, the control circuit comprising a first inverting gain stage having a first load element, and a second inverting gain stage having a second load element, wherein one of the first load element or the second load element is characterized as being a diode and the other of the first load element or the second load element is biased by a bias circuit, wherein one of the first inverting gain stage or the second inverting gain stage includes an input transistor that includes a control electrode coupled to the first current electrode of the regulating transistor, wherein the regulating transistor and the input transistor are of a same channel conductivity type;
wherein the bias circuit comprises;
a first transistor having a first current electrode coupled to a first power supply voltage terminal, a second current electrode and a control electrode both coupled together, anda second transistor having a first current electrode and a control electrode both coupled to the second current electrode and the control electrode of the first transistor, and a second current electrode coupled to a second power supply voltage terminal.
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Accused Products
Abstract
A voltage regulator includes a regulating transistor and a control circuit. The regulating transistor has a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode. The control circuit has an output coupled to the control electrode of the regulating transistor, and an input coupled to the first current electrode of the regulating transistor. The control circuit includes a first inverting gain stage having a first load element, and a second inverting gain stage having a second load element. One of the first or second load elements is characterized as being a diode and the other of the first or second load elements is biased by a bias circuit.
118 Citations
21 Claims
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1. A voltage regulator comprising:
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a regulating transistor having a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode; and a control circuit having an output coupled to the control electrode of the regulating transistor, and an input coupled to the first current electrode of the regulating transistor, the control circuit comprising a first inverting gain stage having a first load element, and a second inverting gain stage having a second load element, wherein one of the first load element or the second load element is characterized as being a diode and the other of the first load element or the second load element is biased by a bias circuit, wherein one of the first inverting gain stage or the second inverting gain stage includes an input transistor that includes a control electrode coupled to the first current electrode of the regulating transistor, wherein the regulating transistor and the input transistor are of a same channel conductivity type; wherein the bias circuit comprises; a first transistor having a first current electrode coupled to a first power supply voltage terminal, a second current electrode and a control electrode both coupled together, and a second transistor having a first current electrode and a control electrode both coupled to the second current electrode and the control electrode of the first transistor, and a second current electrode coupled to a second power supply voltage terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A voltage regulator comprising:
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a regulating transistor having a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode; and a control circuit having an output coupled to the control electrode of the regulating transistor, and an input coupled to the first current electrode of the regulating transistor, the control circuit comprising a first inverting gain stage having a first load element, and a second inverting gain stage having a second load element, wherein one of the first load element or the second load element is characterized as being a diode and the other of the first load element or the second load element is biased by a bias circuit; wherein the first load element of the first inverting gain stage is biased by the bias circuit, the first inverting gain stage has an input coupled to the first current electrode of the regulating transistor, and the first inverting gain stage as an output, and wherein the second load element includes a diode, the second inverting gain stage has an input coupled to the output of the first inverting gain stage, and the second inverting gain stage has an output coupled to the control electrode of the regulating transistor. - View Dependent Claims (10)
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11. A voltage regulator comprising:
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a regulating transistor having a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode; a first inverting gain stage comprising; a first transistor having a first current electrode, a control electrode and a second current electrode coupled together; and a second transistor having a first current electrode coupled to the second current electrode of the first transistor, a control electrode coupled to the first current electrode of the regulating transistor, and a second current electrode; a second inverting gain stage comprising; a third transistor having a first current electrode, a control electrode, and a second current electrode coupled to the control electrode of the regulating transistor; and a fourth transistor having a first current electrode coupled to the second current electrode of the third transistor, a control electrode coupled to the second current electrode of the first transistor, and a second current electrode; and a bias circuit coupled to provide a bias voltage to the control electrode of the third transistor; wherein the regulating transistor and the second transistor are of a first channel conductivity type and the first transistor is of a second channel conductivity type opposite the first channel conductivity type. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A voltage regulator comprising:
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a regulating transistor having a first current electrode for providing a regulated voltage, a second current electrode, and a control electrode; a first inverting gain stage comprising; a first transistor having a first current electrode, a control electrode, and a second current electrode; and a second transistor having a first current electrode coupled to the second current electrode of the first transistor, a control electrode coupled to the first current electrode of the regulating transistor, and a second current electrode; a second inverting gain stage comprising; a third transistor having a first current electrode, and a second current electrode and a control electrode coupled together and to the control electrode of the regulating transistor; and a fourth transistor having a first current electrode coupled to the second current electrode of the third transistor, a control electrode coupled to the second current electrode of the first transistor, and a second current electrode; and a bias circuit coupled to provide a bias voltage to the control electrode of the first transistor. - View Dependent Claims (18, 19, 20, 21)
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Specification