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US 2004/0104761 A1Published application
Charge pump and voltage doubler using the same
AssigneeVIA Technologies, Inc.
InventorChin-Hsien Yen
Life of this patent
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Abstract
A charge pump and a voltage doubler are provided. The charge pump minimizes the difference in voltage between the terminals of a MOS transistor by serially connecting PMOS and NMOS transistors inside the charge pump circuit. The charge pump is able to provide a higher voltage while avoiding a large voltage difference at the gate-source, gate-base and gate-drain interfaces.
Claims7
A charge pump, comprising:
- a voltage source for providing an input voltage;
- a signal source for providing a clocking signal and a phase inverted signal of the clocking signal needed to operate the charge pump;
- a first control signal generation unit, wherein the first control signal generation unit receives the input voltage, the phase inverted clocking signal and a ground voltage and outputs a first control signal, and the voltage level of the first control signal is determined by the phase inverted clocking signal;
- a first output voltage generation unit, wherein the first output voltage generation unit receives the input voltage and the first control signal and outputs via a first output terminal, and where the connection of the input voltage with the first output terminal is determined by a circuit inside the first output voltage generation unit that depends on the first control signal;
- a second control signal generation unit, wherein the second control signal generation unit receives the input voltage, the clocking signal and a ground voltage and outputs a second control signal, and the voltage level of the second control signal is determined by the clocking signal;
- a second output voltage generation unit, wherein the second output voltage generation unit receives the input voltage and the second control signal and outputs via a second output terminal, and where the connection of the input voltage with the second output terminal is determined by a circuit inside the second output voltage generation unit that depends on the second control signal;
- a first capacitor having a first terminal receiving the clocking signal and a second terminal to output a first output voltage, and the second terminal of the first capacitor is connected to the first output terminal;
- and
- a second capacitor having a first terminal receiving the phase inverted clocking signal and the second terminal to output a second output voltage, and the second terminal of the second capacitor is connected to the second output terminal.
6 more elements
Dependencies are inferred from the claim text.