Low-voltage detection circuit
First Claim
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1. A low-voltage detection circuit to detect a terminal voltage of a power supply terminal, comprising:
- a first voltage-dividing circuit coupled to the power supply terminal to divide the terminal voltage into a first compare voltage;
a second voltage-dividing circuit comprising a bias circuit and a metal-oxide-semiconductor (MOS) transistor, the second voltage-dividing circuit being coupled to the power supply terminal to divide the terminal voltage into a second compare voltage, wherein a gate of the MOS transistor receives the terminal voltage; and
a comparator receiving and comparing the first compare voltage and the second compare voltage to generate a voltage detection signal.
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Abstract
A low-voltage detection circuit detects a terminal voltage of a power supply terminal. The low-voltage detection circuit includes a first voltage-dividing circuit, a second voltage-dividing circuit, and a comparator. The second voltage-dividing circuit includes a bias circuit and a metal-oxide-semiconductor (MOS) transistor. The comparator compares and receives a voltage generated by the first voltage-dividing circuit and a voltage generated by the second voltage-dividing circuit to generate a voltage detection signal.
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Citations
18 Claims
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1. A low-voltage detection circuit to detect a terminal voltage of a power supply terminal, comprising:
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a first voltage-dividing circuit coupled to the power supply terminal to divide the terminal voltage into a first compare voltage; a second voltage-dividing circuit comprising a bias circuit and a metal-oxide-semiconductor (MOS) transistor, the second voltage-dividing circuit being coupled to the power supply terminal to divide the terminal voltage into a second compare voltage, wherein a gate of the MOS transistor receives the terminal voltage; and a comparator receiving and comparing the first compare voltage and the second compare voltage to generate a voltage detection signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A low-voltage detection circuit for detecting a first terminal voltage of a first power supply terminal and a second terminal voltage of a second power supply terminal;
- comprising;
a first voltage-dividing circuit coupled to the first power supply terminal and the second power supply terminal to divide the first terminal voltage and the second terminal voltage into a first compare voltage; a second voltage-dividing circuit comprising a bias circuit and a metal-oxide-semiconductor (MOS) transistor, the second voltage-dividing circuit being coupled to the first power supply terminal and the second power supply terminal to divide the first terminal voltage and the second terminal voltage into a second compare voltage, wherein a gate of the MOS transistor receives the terminal voltage; and a comparator, receiving and comparing the first compare voltage and the second compare voltage to generate a voltage detection signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- comprising;
Specification