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US 10,483,844 B2Granted
Charge pump arrangement and method for operating a charge pump arrangement
AssigneeInfineon Technologies AG
InventorGiacomo Curatolo
Life of this patent
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Abstract
A charge pump arrangement and methods for operating a charge pump arrangement are disclosed. According to various embodiments, a charge pump arrangement may include: a charge pump circuit configured to convert an input voltage into an output voltage based on a pump clock signal; a feedback path configured to provide a feedback signal representing the output voltage of the charge pump circuit; and a control circuit configured to receive a clock signal and to control the output voltage of the charge pump circuit by controlling the pump clock signal based on the feedback signal and the clock signal.
Claims12
A charge pump arrangement, comprising:
- a charge pump circuit configured to convert an input voltage into an output voltage based on a pump clock signal;
- a feedback path configured to provide a feedback signal representing the output voltage of the charge pump circuit;
- a control circuit configured to receive a clock signal and to control the output voltage of the charge pump circuit by controlling the pump clock signal based on the feedback signal and the clock signal;
- wherein the feedback path comprises a voltage divider circuit, wherein the voltage divider circuit is coupled to the charge pump circuit to sense the output voltage and further coupled to the control circuit to provide the feedback signal;
- wherein the voltage divider circuit comprises a first capacitor and a second capacitor coupled in a series arrangement, wherein the feedback signal is tapped between the first capacitor and the second capacitor;
- additional voltage divider circuit to sense the output voltage of the charge pump circuit and to provide an additional feedback signal for the control circuit;
- wherein the additional voltage divider circuit comprises a third capacitor and a fourth capacitor coupled in a series arrangement, wherein the additional feedback signal is tapped between the third capacitor and the fourth capacitor;
- and
- a switch arrangement configured to switch the charge pump arrangement into a first operation mode and into a second operation mode by switching between the feedback signal of the voltage divider circuit and the additional feedback signal of the additional voltage divider circuit.
6 more elements
A method for operating a charge pump arrangement, the method comprising:
- providing a clock signal to a control circuit, the control circuit configured to receive the clock signal and to control a voltage output of a charge pump circuit by controlling the clock signal based on a feedback signal and the clock signal, wherein the feedback signal represents the voltage output of a charge pump circuit to provide a pump clock signal to the charge pump circuit;
- alternating a first operation mode and a second operation mode of the charge pump arrangement to control the voltage output of a charge pump circuit;
- sensing the voltage output of the charge pump circuit via a voltage divider circuit, the voltage divider circuit comprising a first capacitor and a second capacitor coupled in a series arrangement,
- providing a feedback signal via the voltage divider circuit in the first operation mode, the feedback signal representing the voltage output of the charge pump circuit, to control the voltage output of the charge pump circuit based on the feedback signal;
- and
- setting the first capacitor to a first predefined voltage and setting the second capacitor to a second predefined voltage in the second operation mode;
- tapping the feedback signal between the first capacitor and the second capacitor;
- sensing the output voltage of the charge pump circuit via an additional voltage divider circuit and providing an additional feedback signal for the control circuit, wherein the additional voltage divider circuit comprises a third capacitor and a fourth capacitor coupled in a series arrangement;
- further comprising tapping the additional feedback signal between the third capacitor and the fourth capacitor;
- and
- switching the charge pump arrangement into a first operation mode and into a second operation mode via a switch arrangement by switching between the feedback signal of the voltage divider circuit and the additional feedback signal of the additional voltage divider circuit.
8 more elements
Dependencies are inferred from the claim text.