DEVICES, SYSTEMS, AND METHODS FOR GENERATING A REFERENCE VOLTAGE
First Claim
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1. A voltage reference generator, comprising:
- a bandgap voltage reference circuit including;
a first divider network including a diode array and configured to generate first complementary-to-absolute-temperature (CTAT) signal; and
a second divider network configured to convey an input to a differential amplifier;
wherein the differential amplifier is configured to output a second complementary-to-absolute-temperature (CTAT) signal; and
a differential sensing device configured to sense the first complementary-to-absolute-temperature (CTAT) signal and the second complementary-to-absolute-temperature (CTAT) signal and to generate a positive reference signal substantially insensitive to temperature variations over an operating temperature range;
wherein the second complementary-to-absolute-temperature (CTAT) signal is operably coupled to a non-inverting input of the differential sensing device.
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Abstract
Methods, devices, and systems are disclosed for a voltage reference generator. A voltage reference generator may comprise a bandgap voltage reference circuit configured to output two complementary-to-absolute-temperature (CTAT) signals. The voltage reference generator may further comprise a differential sensing device configured to sense the two complementary-to-absolute-temperature (CTAT) signals and generate a positive reference signal substantially insensitive to temperature variations over an operating temperature range.
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Citations
25 Claims
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1. A voltage reference generator, comprising:
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a bandgap voltage reference circuit including; a first divider network including a diode array and configured to generate first complementary-to-absolute-temperature (CTAT) signal; and a second divider network configured to convey an input to a differential amplifier; wherein the differential amplifier is configured to output a second complementary-to-absolute-temperature (CTAT) signal; and a differential sensing device configured to sense the first complementary-to-absolute-temperature (CTAT) signal and the second complementary-to-absolute-temperature (CTAT) signal and to generate a positive reference signal substantially insensitive to temperature variations over an operating temperature range; wherein the second complementary-to-absolute-temperature (CTAT) signal is operably coupled to a non-inverting input of the differential sensing device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A voltage reference generator, comprising:
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a bandgap voltage reference circuit including; a first output signal operably coupled between a resistive element and a diode array of a first divider network; and a second output signal operably coupled to an output of a differential amplifier; and a differential sensing device operably coupled to the first output signal and the second output signal and configured to generate a reference signal substantially insensitive to temperature variations over an operating temperature range; wherein the second output signal is operably coupled to a non-inverting input of the sensing device. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for generating a reference signal, comprising:
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generating a first voltage at a node operably coupled between a resistive element and a diode array to generate a first complementary-to-absolute-temperature (CTAT) signal; differentially sensing the first voltage and a generated second voltage to generate a second complementary-to-absolute-temperature (CTAT) signal; inputting the second complementary-to-absolute-temperature (CTAT) signal to a non-inverting input of a sensing device; differentially sensing the first complementary-to-absolute-temperature CTAT signal and the second complementary-to-absolute-temperature CTAT signal; and generating a positive reference signal substantially insensitive to temperature variations over an operating temperature range. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A memory device, comprising:
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a memory array; and a voltage reference generator operably associated with the memory array, including; a bandgap voltage reference circuit including a first complementary-to-absolute-temperature (CTAT) signal operably coupled to a first divider network having a diode array and a second complementary-to-absolute-temperature (CTAT) signal operably coupled to an output of a differential amplifier; and a differential sensing device for generating a reference signal above a ground potential, wherein the reference signal is substantially insensitive to temperature variations over an operating temperature range responsive to sensing the first and second complementary-to-absolute-temperature (CTAT) signals, wherein a non-inverting input of the differential sensing device is operably coupled to the second complementary-to-absolute-temperature (CTAT) signal. - View Dependent Claims (23, 24)
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25. An electronic system, comprising:
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at least one processor;
at least one memory device; andat least one voltage reference generator operably associated with the at least one memory device and comprising; a bandgap voltage reference circuit including a first signal and a second signal, each of the first signal and the second signal configured to exhibit a decrease in voltage during an increase in operating temperature; a differential sensing device for generating a positive reference signal substantially insensitive to temperature variations over an operating temperature range from sensing the first signal and the second signal; and a unity gain buffer having a non-inverting input configured to receive the first signal and output a buffered signal to an inverting input of the differential sensing device.
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Specification