POWER SUPPLY DETECTION CIRCUIT
First Claim
1. A power supply detection circuit comprising:
- an input circuit responsive to a core power supply voltage to generate a first output voltage at a first node;
a sense logic circuit to sense a voltage drop associated with the first output voltage, when the first output voltage is at a logic level HIGH;
a current mirror circuit responsive to the voltage drop to increase voltage of the first output voltage to an input and output power supply voltage; and
an output circuit that inverts the first output voltage to generate a second output voltage at a second node.
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Accused Products
Abstract
Power supply detection circuit. The power supply detection circuit includes an input circuit responsive to a core power supply voltage to generate a first output voltage at a first node. The power supply detection circuit also includes a sense logic circuit to sense a voltage drop associated with the first output voltage, when the first output voltage is at a logic level HIGH. Further, the power supply detection circuit includes a current mirror circuit responsive to the voltage drop to increase voltage of the first output voltage to an input and output power supply voltage. Moreover, the power supply detection circuit also includes an output circuit that inverts the first output voltage to generate a second output voltage at a second node.
9 Citations
12 Claims
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1. A power supply detection circuit comprising:
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an input circuit responsive to a core power supply voltage to generate a first output voltage at a first node; a sense logic circuit to sense a voltage drop associated with the first output voltage, when the first output voltage is at a logic level HIGH; a current mirror circuit responsive to the voltage drop to increase voltage of the first output voltage to an input and output power supply voltage; and an output circuit that inverts the first output voltage to generate a second output voltage at a second node. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An integrated circuit comprising:
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a core logic circuit that receives a core power supply voltage and an input and output power supply voltage from a power supply circuit, the core logic circuit responsive to the core power supply voltage to generate an output; a power supply detection circuit, coupled to the core logic circuit, comprising; an input circuit responsive to the core power supply voltage to generate a first output voltage at a first node, a sense logic circuit to sense a voltage drop associated with the first output voltage, when the first output voltage is at a logic level HIGH, a current minor circuit responsive to the voltage drop to increase voltage of the first output voltage to the input and output power supply voltage, and an output circuit that inverts the first output voltage to generate a second output voltage at a second node; and an input and output circuit coupled to the core logic circuit and the power supply detection circuit, and responsive to both the output and the second output voltage to minimize power dissipation.
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9. A method of detecting power supply, the method comprising:
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generating a first output voltage at a first node in response to a core power supply voltage; sensing a voltage drop associated with the first output voltage when the first output voltage is at a logic level HIGH; increasing voltage of the first output voltage to an input and output power supply voltage in response to the voltage drop; and inverting the first output voltage to generate a second output voltage at a second node. - View Dependent Claims (10, 11, 12)
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Specification