RESISTANCE MEASUREMENT CIRCUIT AND MEASURING METHOD EMPLOYING THE SAME
First Claim
1. A resistance measurement circuit used in a power circuit, comprising:
- an analog to digital converter (ADC) electrically connected to the power circuit to receive output voltage from the power circuit;
a signal control module electrically connected to the ADC; and
a potentiometer electrically connected to the signal control module, wherein the ADC converts the output voltage from the power circuit to corresponding digital signals, the signal control module compares two consecutive digital signals to establish a voltage difference according to the comparison, if the voltage difference is outside a predetermined voltage range, the signal control module controls the potentiometer to adjust the resistance and the output voltage from the power circuit until the voltage difference is within the predetermined voltage range.
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Accused Products
Abstract
A resistance measurement circuit used in a power circuit includes an analog to digital converter (ADC), a signal control module, and a potentiometer. The ADC can receive an output voltage from the power circuit and convert the output voltage from the power circuit to digital signals. The signal control module compares two consecutive digital signals to establish any voltage difference according to the comparison. If the voltage difference is outside a predetermined voltage range, the signal control module adjusts the resistance of the potentiometer and the output voltage from the power circuit until the voltage difference is within the predetermined voltage range.
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Citations
20 Claims
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1. A resistance measurement circuit used in a power circuit, comprising:
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an analog to digital converter (ADC) electrically connected to the power circuit to receive output voltage from the power circuit; a signal control module electrically connected to the ADC; and a potentiometer electrically connected to the signal control module, wherein the ADC converts the output voltage from the power circuit to corresponding digital signals, the signal control module compares two consecutive digital signals to establish a voltage difference according to the comparison, if the voltage difference is outside a predetermined voltage range, the signal control module controls the potentiometer to adjust the resistance and the output voltage from the power circuit until the voltage difference is within the predetermined voltage range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A resistance measurement circuit used in a power circuit to figure out a desired resistance, the power circuit comprising an output terminal, the resistance measurement circuit comprising:
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an analog to digital converter (ADC) electrically connected to the output terminal of the power circuit; a signal control module electrically connected to the ADC to control the ADC to receive different output voltage from the output terminal of the power circuit; and a potentiometer electrically connected to the signal control module, wherein the ADC converts the output voltage from the output terminal of the power circuit to corresponding digital signals, the signal control module compares two consecutive digital signals corresponding to the two consecutive output voltage, and establishes a voltage difference according to the comparison, if the voltage difference is outside a predetermined voltage range, the signal control module sends a command signal to control the potentiometer to adjust the resistance and the output voltage from the output terminal until the voltage difference is within predetermined voltage range or the comparison has finished, if the voltage difference is within the predetermined voltage range, the signal control module stores the current resistance of the potentiometer as the desired resistance. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A measuring method for measuring the resistance of a temperature-compensating resistor in a power circuit, the measuring method comprising steps of:
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obtaining a first output voltage from the power circuit; obtaining a second output voltage from the power circuit at certain intervals; comparing the first output voltage with the second output voltage to establish a voltage difference to determine whether the voltage difference is within a predetermined voltage range within a certain period of observational time; and recording the current resistance of a potentiometer to use the current resistance as the desired resistance of the temperature-compensating resistor. - View Dependent Claims (18, 19, 20)
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Specification