Charge-pump system for providing independent voltages
First Claim
1. A charge pump system comprising:
- a charge pump having a switch control input, a voltage output terminal, a high voltage terminal coupled to a high voltage node and a low voltage terminal coupled to a low voltage node;
a first buck/boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a first output node and a first control terminal for receiving a first control signal;
a second buck/boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a second output node, and a control terminal for receiving a second control signal; and
a switch controller having an output coupled to the switch control input of the charge pump, the switch controller being adapted to generate the first control signal, and the second control signal such that a first voltage pulse output from the first output node and a second voltage pulse output from the second output node are asymmetrical and coincidental.
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Accused Products
Abstract
Disclosed is a charge pump system having a charge pump with a switch control input, a voltage output terminal, a high voltage terminal coupled to a high voltage node and a low voltage terminal coupled to a low voltage node. Also included is a first buck/boost switch having a first terminal coupled to the voltage output terminal, a second terminal coupled to a first output node, and a first control terminal for receiving a first control signal. A second buck/boost switch includes a first terminal coupled to the voltage output terminal, a second terminal coupled to a second output node, and a control terminal for receiving a second control signal. Further included is a switch controller that is adapted to generate the first control signal and the second control signal such that voltage pulses output from the first output node and the second output node, respectively, are asymmetrical and coincidental.
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Citations
25 Claims
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1. A charge pump system comprising:
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a charge pump having a switch control input, a voltage output terminal, a high voltage terminal coupled to a high voltage node and a low voltage terminal coupled to a low voltage node; a first buck/boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a first output node and a first control terminal for receiving a first control signal; a second buck/boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a second output node, and a control terminal for receiving a second control signal; and a switch controller having an output coupled to the switch control input of the charge pump, the switch controller being adapted to generate the first control signal, and the second control signal such that a first voltage pulse output from the first output node and a second voltage pulse output from the second output node are asymmetrical and coincidental. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A charge pump system comprising:
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a charge pump having a switch control input, a voltage output terminal, a high voltage terminal coupled to a high voltage node and a low voltage terminal coupled to a low voltage node; a first boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a first output node, and a first control terminal for receiving a first boost signal; a second boost switch having a first terminal directly coupled to the voltage output terminal of the charge pump, a second terminal coupled to a second output node, and a second control terminal for receiving a second boost signal; a first buck switch with a first terminal coupled to the high voltage node, a second terminal coupled to the first output node, and a control terminal for receiving a first buck signal; a second buck switch with a first terminal coupled to the high voltage node, a second terminal coupled to the second output node, and a control terminal for receiving a second buck signal; and a switch controller having an output coupled to the switch control input of the charge pump, the switch controller being adapted to generate the first boost signal, the second boost signal, the first buck signal, and the second buck signal such that a first voltage pulse output from the second terminal of the first boost switch and a second voltage pulse output from the second terminal of the second boost switch are asymmetrical and coincidental. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification