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US 12,687,871 B2Granted
Systems and methods for generating a temperature dependent supply voltage
AssigneeAltera Corporation
InventorPing-Chen Liu
Life of this patent
Estimating the term…
Abstract
An integrated circuit includes a diode for generating a temperature dependent voltage, a resistor divider for generating divided voltages by dividing the temperature dependent voltage, and a multiplexer circuit for selecting one of the divided voltages as a reference voltage used for setting a supply voltage.
Claims20
An integrated circuit comprising:
- a diode for generating a temperature dependent voltage;
- a resistor divider for generating divided voltages by dividing the temperature dependent voltage;
- a multiplexer circuit for selecting one of the divided voltages as a reference voltage used for generating a supply voltage for the integrated circuit;
- and
- a logic circuit comprising logic gates, wherein the supply voltage is provided to supply the logic circuit.
2 more elements
A method for generating a supply voltage, the method comprising:
- generating a temperature dependent voltage that varies based on variations in a temperature of a diode by generating an input current through a transistor using an amplifier circuit in response to an input voltage and generating a bias current through the diode based on the input current using a current mirror circuit;
- generating divided voltages by dividing the temperature dependent voltage using a resistor divider;
- selecting one of the divided voltages as a reference voltage using a multiplexer circuit;
- and
- generating the supply voltage that varies in response to the temperature of the diode based on the reference voltage using a voltage regulator circuit.
2 more elements
A circuit system comprising:
- a diode;
- a reference voltage generator circuit comprising a resistor divider that generates reference voltages based on a voltage across the diode;
- a selector circuit that selects one of the reference voltages as a selected reference voltage;
- a voltage regulator circuit that generates a supply voltage based on the selected reference voltage, wherein the voltage regulator circuit causes the supply voltage to vary with a temperature of the diode;
- and
- a logic circuit comprising logic gates, wherein the supply voltage is provided to supply the logic circuit.
3 more elements
Dependencies are inferred from the claim text.