LOW VOLTAGE ULTRA-LOW POWER CONTINUOUS TIME REVERSE BANDGAP REFERENCE CIRCUIT
First Claim
1. A bandgap voltage circuit, comprising:
- a first circuit coupled between a supply node and a reference node, the first circuit including;
a self-cascoded transistor circuit connected between a first input node and a first feedback node,a resistor connected between the first feedback node and the reference node, andan output node connected to the self-cascoded transistor circuit;
a regulator circuit, including;
a first regulator transistor connected between the supply node and the first input node,a second regulator transistor connected between the supply node and a second input node, andan amplifier, including;
a non-inverting input terminal connected to the first feedback node,an inverting input terminal connected to a second feedback node, andan amplifier output terminal connected to control terminals of the first and second regulator transistors; and
a second circuit, including;
a transistor connected between the second input node and the reference node, the transistor including a control terminal connected to the second input node, anda scaling circuit, including a first resistor connected between the second input node and the second feedback node, and a second resistor connected between the second feedback node and the reference node.
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Accused Products
Abstract
A bandgap voltage circuit with a first circuit to generate an output voltage as a sum of a first voltage with an amplitude that is proportional to absolute temperature, and a first feedback voltage with an amplitude that is complementary to absolute temperature, a second circuit to generate a voltage having an amplitude that is complementary to absolute temperature, a scaling circuit to generate a second feedback voltage with an amplitude that is a fraction of the voltage of the control terminal, and a regulator circuit to regulate the first feedback voltage according to the second feedback voltage by controlling a first input current of the first circuit and a second input current of the second circuit.
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Citations
21 Claims
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1. A bandgap voltage circuit, comprising:
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a first circuit coupled between a supply node and a reference node, the first circuit including; a self-cascoded transistor circuit connected between a first input node and a first feedback node, a resistor connected between the first feedback node and the reference node, and an output node connected to the self-cascoded transistor circuit; a regulator circuit, including; a first regulator transistor connected between the supply node and the first input node, a second regulator transistor connected between the supply node and a second input node, and an amplifier, including; a non-inverting input terminal connected to the first feedback node, an inverting input terminal connected to a second feedback node, and an amplifier output terminal connected to control terminals of the first and second regulator transistors; and a second circuit, including; a transistor connected between the second input node and the reference node, the transistor including a control terminal connected to the second input node, and a scaling circuit, including a first resistor connected between the second input node and the second feedback node, and a second resistor connected between the second feedback node and the reference node. - View Dependent Claims (2, 3, 4, 5, 14)
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6-13. -13. (canceled)
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15. A bandgap voltage circuit, comprising:
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a first circuit, including; a self-cascoded transistor circuit with an output node configured to generate an output voltage as a sum of;
a first voltage with an amplitude that is proportional to temperature, and a first feedback voltage with an amplitude that is complementary to temperature, anda first feedback node configured to generate the first feedback voltage according to a first input current; a second circuit, including; a diode connected bipolar transistor with a control terminal configured to generate a voltage having an amplitude that is complementary to temperature, and a scaling circuit configured to generate the second feedback voltage with an amplitude that is a fraction of the voltage of the control terminal; and a regulator circuit configured to regulate the first feedback voltage according to the second feedback voltage by controlling the first input current of the first circuit and a second input current of the second circuit. - View Dependent Claims (16, 17, 18, 19)
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20. A battery system, comprising:
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a battery with an output terminal; a bandgap voltage circuit coupled to the output terminal of the battery, the bandgap voltage circuit including; a first circuit, including; a self-cascoded transistor circuit with an output node configured to generate an output voltage as a sum of;
a first voltage with an amplitude that is proportional to temperature, and a first feedback voltage with an amplitude that is complementary to temperature, anda first feedback node configured to generate the first feedback voltage according to a first input current, a second circuit, including; a diode connected bipolar transistor with a control terminal configured to generate a voltage having an amplitude that is complementary to temperature, and a scaling circuit configured to generate the second feedback voltage with an amplitude that is a fraction of the voltage of the control terminal, and a regulator circuit configured to regulate the first feedback voltage according to the second feedback voltage by controlling the first input current of the first circuit and a second input current of the second circuit; and an analog to digital converter circuit, including a reference input terminal coupled with the output terminal, an analog input terminal configured to receive an analog input signal to be converted, and an output terminal or bus configured to provide a converted digital value. - View Dependent Claims (21)
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Specification