Dual output charge pump
First Claim
1. A charge pump comprising a boost charge pump circuit including an input node and a boosted-voltage output node, and a buck charge pump circuit including the input node and a divided-voltage output node, the boost charge pump circuit and the buck charge pump circuit sharing a common flying capacitance, the common flying capacitance configured to undergo truncated charging to limit a ripple effect in a hysteretic feedback loop, the boost charge pump circuit and the buck charge pump circuit each including a plurality of switches implemented to incorporate the common flying capacitance and generate a boosted output voltage and a divided output voltage, respectively.
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Abstract
According to some implementation, a charge pump includes a boost charge pump circuit and a buck charge pump circuit sharing a common flying capacitance. In some implementations, the boost pump circuit includes an input node and a boosted-voltage output node, and the buck charge pump circuit includes the input node and a divided-voltage output node. In some implementations, the charge pump of claim 3 wherein the boosted-voltage includes 2×Vin, and the divided-voltage includes Vin/2, Vin being an input voltage at the input node. In some implementations, the boost pump circuit further includes a first holding capacitance that couples the boosted-voltage output node to a ground. In some implementations, the buck pump circuit further includes a second holding capacitance that couples the divided-voltage output node to the ground.
38 Citations
20 Claims
- 1. A charge pump comprising a boost charge pump circuit including an input node and a boosted-voltage output node, and a buck charge pump circuit including the input node and a divided-voltage output node, the boost charge pump circuit and the buck charge pump circuit sharing a common flying capacitance, the common flying capacitance configured to undergo truncated charging to limit a ripple effect in a hysteretic feedback loop, the boost charge pump circuit and the buck charge pump circuit each including a plurality of switches implemented to incorporate the common flying capacitance and generate a boosted output voltage and a divided output voltage, respectively.
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15. A voltage supply system comprising:
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a boost converter configured to generate a boosted voltage based on an input voltage; and a charge pump having a boost charge pump circuit including an input node and a boosted-voltage output node, and a buck charge pump circuit including the input node and a divided-voltage output node, the boost charge pump circuit and the buck charge pump circuit sharing a common flying capacitance, the common flying capacitance configured to undergo truncated charging to limit a ripple effect in a hysteretic feedback loop, the boost charge pump circuit and the buck charge pump circuit each including a plurality of switches implemented to incorporate the common flying capacitance and generate a boosted output voltage and a divided output voltage, respectively. - View Dependent Claims (16, 17)
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18. A radio-frequency module comprising:
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a packaging substrate configured to receive a plurality of components; and a power amplification system implemented on the packaging substrate, the power amplification system including a voltage supply system, the voltage supply system including a charge pump having a boost charge pump circuit including an input node and a boosted-voltage output node, and a buck charge pump circuit including the input node and a divided-voltage output node, the boost charge pump circuit and the buck charge pump circuit sharing a common flying capacitance, the common flying capacitance configured to undergo truncated charging to limit a ripple effect in a hysteretic feedback loop, the boost charge pump circuit and the buck charge pump circuit each including a plurality of switches implemented to incorporate the common flying capacitance and generate a boosted output voltage and a divided output voltage, respectively. - View Dependent Claims (19, 20)
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Specification