TEMPERATURE MONITORING CIRCUIT
First Claim
1. A temperature monitoring circuit comprising:
- a negative temperature coefficient (NTC) resistor, wherein a first terminal of the NTC resistor is connected to a power supply through a first resistor, a second terminal of the NTC is grounded;
a zener diode, wherein a cathode of the zener diode is connected to a node between the NTC resistor and the first resistor, an anode of the zener diode is grounded through a second resistor;
an alarm, wherein a first terminal of the alarm is connected to the cathode of the zener diode, and is grounded through a third resistor and a fourth resistor connected in series; and
a silicon controlled rectifier, wherein a cathode of the silicon controlled rectifier is connected to the anode of the zener diode, an anode of the silicon controlled rectifier is connected to a second terminal of the alarm, a control terminal of the silicon controlled rectifier is connected to a node between the third resistor and the fourth resistor.
1 Assignment
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Accused Products
Abstract
A temperature monitoring circuit includes a negative temperature coefficient (NTC) resistor, a zener diode, an alarm, a silicon controlled rectifier. A first terminal of the NTC resistor is connected to a power supply through a first resistor. A second terminal of the NTC resistor is grounded. A cathode of the zener diode is connected to a node between the NTC resistor and the first resistor. An anode is grounded through a second resistor. A first terminal of the alarm is connected to the cathode of the zener diode, and is grounded through a third and fourth resistors in series. A cathode of the silicon controlled rectifier is connected to the anode of the zener diode. An anode of the silicon controlled rectifier is connected to a second terminal of the alarm. A control terminal of the silicon controlled rectifier is connected to a node between the third and fourth resistors.
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Citations
7 Claims
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1. A temperature monitoring circuit comprising:
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a negative temperature coefficient (NTC) resistor, wherein a first terminal of the NTC resistor is connected to a power supply through a first resistor, a second terminal of the NTC is grounded; a zener diode, wherein a cathode of the zener diode is connected to a node between the NTC resistor and the first resistor, an anode of the zener diode is grounded through a second resistor; an alarm, wherein a first terminal of the alarm is connected to the cathode of the zener diode, and is grounded through a third resistor and a fourth resistor connected in series; and a silicon controlled rectifier, wherein a cathode of the silicon controlled rectifier is connected to the anode of the zener diode, an anode of the silicon controlled rectifier is connected to a second terminal of the alarm, a control terminal of the silicon controlled rectifier is connected to a node between the third resistor and the fourth resistor. - View Dependent Claims (2, 3)
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4. A temperature monitoring circuit comprising:
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a negative temperature coefficient (NTC) resistor, wherein a first terminal of the NTC resistor is connected to a power supply through a first resistor, a second terminal of the NTC resistor is grounded; a zener diode, wherein a cathode of the zener diode is connected to a node between the NTC resistor and the first resistor, an anode of the zener diode is grounded through a second resistor; a fan, wherein a first terminal of the fan is grounded through a third resistor and a fourth resistor connected in series; and a silicon controlled rectifier, wherein a cathode of the silicon controlled rectifier is connected to the anode of the zener diode, an anode of the silicon controlled rectifier is connected to a second terminal of the fan, a control terminal of the silicon controlled rectifier is connected to a node between the third resistor and the fourth resistor. - View Dependent Claims (5, 6, 7)
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Specification