Back to results
US 10,476,384 B1Granted
Regulated high voltage reference
AssigneeRobert Bosch GmbH
InventorsDanielle Morton, Chinwuba Ezekwe
Life of this patent
Estimating the term…
Abstract
A variable high voltage charge-pump system includes a plurality of unregulated switching stages and a plurality of regulated switching stages arranged in a cascaded configuration. The unregulated switching stages receive unregulated voltage input signals, and the regulated switching stages receive regulated voltage input signals. An amplifier generates the regulated voltage input signals to bring the output voltage to a desired value.
Claims16
A variable high voltage charge-pump system comprising:
- an output node at which an output voltage is provided;
- a plurality of unregulated switching stages coupled to the output node, each of the unregulated switching stages including an unregulated clock input, an unregulated inverse clock input, and pumping capacitors, the unregulated clock input receiving an unregulated clock signal, the unregulated inverse clock input receiving an unregulated inverse clock signal;
- a plurality of regulated switching stages coupled to the output node, each of the regulated switching stages including a regulated clock input, an regulated inverse clock input, and pumping capacitors, the regulated clock input receiving a regulated clock signal, the regulated inverse clock input receiving a regulated inverse clock signal;
- and
- an amplifier that outputs a regulating voltage, the regulated clock signal and the regulated inverse clock signal being generated based on the regulating voltage,
- wherein the regulating voltage is adjustable to bring the output voltage to a desired value.
3 more elements
A method of operating a variable high voltage charge pump system, comprising:
- supplying an unregulated clock voltage and an unregulated inverse clock voltage to a plurality of unregulated switching stages, the plurality of unregulated switching stages being cascaded with a plurality of regulated switching stages, the plurality of unregulated switching stages and the plurality of regulated switching stages being coupled to provide an output voltage at an output node, each of the unregulated switching stages including an unregulated clock input, an unregulated inverse clock input and pumping capacitors, the unregulated clock input voltage being supplied to the clock input and the unregulated inverse clock input voltage being supplied to the inverse clock input;
- supplying a regulated clock voltage and a regulated inverse clock voltage to the plurality of regulated switching stages, each of the regulated switching stages including a regulated clock input, a regulated inverse clock input and pumping capacitors, the regulated clock input voltage being supplied to the regulated clock input and the regulated inverse clock input voltage being supplied to the regulated inverse clock input;
- adjusting the regulated clock voltage and the regulated inverse clock voltage to bring the output voltage to a desired value.
Dependencies are inferred from the claim text.