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US 8,026,755 B2Granted
Signal output apparatus, charge pump, voltage doubler and method for outputting current
AssigneeActions Semiconductor Co., Ltd.
InventorsChenzhi Ni, Jiang Xiong
Life of this patent
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Abstract
A signal output apparatus, a charge pump, a voltage doubler and a method for outputting a current are provided. The interior circuit of a chip is used to generate an oscillation signal with a swing of 0 to 2×VIN, which drives a charge-pump type voltage doubler using large capacitors outside the chip to output a large current.
Claims18
A charge pump, comprising:
- a signal output module, adapted to output a first output signal with a swing of 0 to 2×VIN;
- and
- a charge storage module, adapted to take the first output signal as a triggering signal to generate two states, wherein one state is to charge one plate of a capacitor by an input voltage VIN, and the other state is to provide a voltage higher than 0 volt to the other plate of the capacitor,
- wherein the signal output module comprises:
- a first signal generating unit, adapted to generate a first oscillation signal with a swing of input voltage VIN to 2×VIN and a second oscillation signal with a swing of 0 to VIN and a phase the same as that of the first oscillation signal;
- and
- a second signal generating unit, adapted to take the first oscillation signal and the second oscillation signal as triggering signals, convert the input voltage to a first output signal with a swing of 0 to 2×VIN and output the first output signal, wherein the phases of the first output signal and the first oscillation signal are the same.
4 more elements
A voltage doubler, comprising:
- a signal output module, adapted to output a first output signal with a swing of 0 to 2×VIN, and a first oscillation signal and a third oscillation signal with the same swing of VIN to 2×VIN but with opposite phases;
- a charge storage module, adapted to take the first output signal as a triggering signal to generate two states, wherein one state is to charge one plate of a first capacitor by an input voltage VIN, and the other state is to provide a voltage higher than 0 volt to the other plate of the first capacitor;
- and
- a current output switch module, adapted to take the first oscillation signal and the third oscillation signal as triggering signals and output the charges stored in the charge storage module via the first capacitor.
1 more element
A method for outputting a current, comprising:
- generating a first oscillation signal with a swing of VIN to 2×VIN, a second oscillation signal with a swing of 0 to VIN and a phase the same as that of the first oscillation signal, and a third oscillation signal with a swing the same as that of the first oscillation signal but with an opposite phase;
- taking the first oscillation signal and the second oscillation signal as triggering signals, converting the input voltage to a first output signal with a swing of 0 to 2×VIN and outputting the first output signal, wherein the phases of the first output signal and the first oscillation signal are the same;
- taking the first output signal as a triggering signal to generate two states, wherein one state is to charge one plate of a first capacitor by the input voltage VIN, and the other state is to provide a voltage higher than 0 volt to the other plate of the first capacitor;
- and
- taking the first oscillation signal and the third oscillation signal as triggering signals to output the charges on the plate of the first capacitor.
2 more elements
Dependencies are inferred from the claim text.