Signal calculator
AssigneeFairchild Korea Semiconductor Ltd.
InventorsTaesung KIM, Seunguk YANG, Youngbae PARK
Life of this patent
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Abstract
Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.
Claims20
A time divider comprising:
- a first switch configured to perform a switching operation according to a first signal and a second switch configured to perform a switching operation according to a second signal, wherein the first signal represents a first time and the second signal represents a second time;
- a first capacitor coupled to one end of the first switch and to one end of the second switch;
- and
- a comparison part configured to generate an output based on a period for a charged voltage to reach a second voltage that corresponds to the second time, wherein the charged voltage is increased according to a first current based on a first voltage that corresponds to the first time.
A method of operating a time divider circuit, the method comprising:
- generating a first voltage on a first capacitor according to a first time period;
- generating a second voltage on a second capacitor according to a second time period;
- generating a first current according to the first voltage;
- charging a third capacitor with the first current to generate a third voltage;
- comparing the third voltage to the second voltage;
- and
- generating an output of the time divider circuit based on a time it takes the third voltage to increase to the second voltage.
A time divider comprising:
- a first capacitor that is configured to hold a first voltage that represents a first time period;
- a second capacitor that is configured to hold a second voltage that represents a second time period;
- and
- a comparison part that is configured to receive the first voltage and the second voltage, generate a first current according to the first voltage, charge a third capacitor with the first current, compare the second voltage to a charged voltage on the third capacitor, and generate an output based on a time it takes the charged voltage to increase to the second voltage.
Dependencies are inferred from the claim text.