Voltage detector
First Claim
1. A voltage detector comprising:
- a first input terminal to receive a first input voltage;
a second input terminal to receive a second input voltage;
a first voltage detection circuit connected to the first input terminal to output a first detection signal that switches a logic state thereof when the first input voltage falls below a first detection voltage;
a second voltage detection circuit connected to the second input terminal to output a second detection signal that switches a logic state thereof when the second input voltage falls below a second detection voltage,the second detection voltage being lower than the first detection voltage and higher than a minimum operating voltage of the first voltage detection circuit; and
a logic holder circuit having an input thereof connected to the second voltage detection circuit and an output thereof connected to the first voltage detection circuit to retain the logic state of the first detection signal when the second detection signal indicates that the second input voltage is below the second detection voltage.
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Accused Products
Abstract
A voltage detector includes a first input terminal, a second input terminal, a first voltage detection circuit, a second voltage detection circuit, and a logic holder circuit. The first input terminal receives a first input voltage. The second input terminal receives a second input voltage. The first voltage detection circuit outputs a first detection signal that switches a logic state thereof when the first input voltage falls below a first detection voltage. The second voltage detection circuit outputs a second detection signal that switches a logic state thereof when the second input voltage falls below a second detection voltage. The logic holder circuit retains the logic state of the first detection signal when the second detection signal indicates that the second input voltage is below the second detection voltage.
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Citations
16 Claims
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1. A voltage detector comprising:
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a first input terminal to receive a first input voltage; a second input terminal to receive a second input voltage; a first voltage detection circuit connected to the first input terminal to output a first detection signal that switches a logic state thereof when the first input voltage falls below a first detection voltage; a second voltage detection circuit connected to the second input terminal to output a second detection signal that switches a logic state thereof when the second input voltage falls below a second detection voltage, the second detection voltage being lower than the first detection voltage and higher than a minimum operating voltage of the first voltage detection circuit; and a logic holder circuit having an input thereof connected to the second voltage detection circuit and an output thereof connected to the first voltage detection circuit to retain the logic state of the first detection signal when the second detection signal indicates that the second input voltage is below the second detection voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification