DEVICE AND METHOD FOR DETECTING ZERO CROSSING AND VOLTAGE AMPLITUDE FROM SINGLE PULSE SIGNAL
First Claim
1. An apparatus for detecting a zero crossing and a voltage amplitude of a commercial power source voltage inputted to an electronic device, the apparatus comprising:
- a first calculation unit that compares the commercial power source voltage to a first reference voltage to determine whether or not the commercial power source voltage is smaller than the first reference voltage;
a second calculation unit that compares the commercial power source voltage to a second reference voltage smaller than the first reference voltage to determine whether or not the commercial power source voltage is larger than the second reference voltage;
a pulse output unit that outputs a pulse if the commercial power source voltage is smaller than the first reference voltage but larger than the second reference voltage; and
a detecting unit that detects a zero crossing and a voltage amplitude by analyzing the pulse which has been outputted from the pulse output unit.
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Accused Products
Abstract
A device and method for detecting a zero crossing and voltage amplitude of a commercial power source voltage inputted to an electronic device, from a single pulse signal are disclosed. The apparatus for detecting a zero crossing and a voltage amplitude from a single pulse signal includes: a first calculation unit that compares the commercial power source voltage to a first reference voltage to determine whether or not the commercial power source voltage is smaller than the first reference voltage; a second calculation unit that compares the commercial power source voltage to a second reference voltage smaller than the first reference voltage to determine whether or not the commercial power source voltage is larger than the second reference voltage; a pulse output unit that outputs a pulse if the commercial power source voltage is smaller than the first reference voltage but larger than the second reference voltage; and a detecting unit that detects a zero crossing and a voltage amplitude by analyzing the pulse which has been outputted from the pulse output unit.
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Citations
7 Claims
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1. An apparatus for detecting a zero crossing and a voltage amplitude of a commercial power source voltage inputted to an electronic device, the apparatus comprising:
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a first calculation unit that compares the commercial power source voltage to a first reference voltage to determine whether or not the commercial power source voltage is smaller than the first reference voltage; a second calculation unit that compares the commercial power source voltage to a second reference voltage smaller than the first reference voltage to determine whether or not the commercial power source voltage is larger than the second reference voltage; a pulse output unit that outputs a pulse if the commercial power source voltage is smaller than the first reference voltage but larger than the second reference voltage; and a detecting unit that detects a zero crossing and a voltage amplitude by analyzing the pulse which has been outputted from the pulse output unit. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting a zero crossing and a voltage amplitude of a commercial power source voltage inputted to an electronic device, the method comprising:
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comparing the commercial power source voltage to a first reference voltage to determine whether or not the commercial power source voltage is smaller than the first reference voltage; comparing the commercial power source voltage to a second reference voltage smaller than the first reference voltage to determine whether or not the commercial power source voltage is larger than the second reference voltage; outputting a pulse if the commercial power source voltage is smaller than the first reference voltage but larger than the second reference voltage; and detecting a zero crossing and a voltage amplitude by analyzing the outputted pulse. - View Dependent Claims (7)
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Specification