Samsung patents circuit to reduce noise in high-voltage power regulators
Samsung describes a circuit design that cleans up power signals for high-voltage components. It uses two parallel regulators and a filter to switch between different voltage sources depending on whether the system is starting up or running steadily.
In the filing’s own words
A device comprises a first intermediate LDO regulator configured to generate a first enhanced reference voltage, a resistor-capacitor (RC) circuit connected to the first intermediate LDO regulator, the RC circuit comprising an RC filter configured to generate a filtered reference voltage based on the first enhanced reference voltage; a second intermediate LDO regulator connected in parallel to the first intermediate LDO regulator and the RC circuit; the second intermediate LDO regulator generates a second replica enhanced reference voltage based on the input reference voltage; a low noise buffer selectively receiving one of the filtered reference voltage or the second replica enhanced reference voltage to generate a buffer reference voltage. These are configured to be transmitted to the high voltage LDO regulator based on an operational state of the RC filter. The high voltage LDO regulator is configured to generate the output based on the buffered reference voltage.
What exactly they claim (claim 1)
1. A device for improving upon noise at an output of a high voltage Low-Dropout (LDO) regulator, the device comprising: a first intermediate LDO regulator configured to generate a first enhanced reference voltage based on an input reference voltage; a resistor-capacitor (RC) circuit connected to the first intermediate LDO regulator, wherein the RC circuit comprises an RC filter configured to generate a filtered reference voltage based on the first enhanced reference voltage; a second intermediate LDO regulator connected in parallel to the first intermediate LDO regulator and the RC circuit, wherein the second intermediate LDO regulator is configured to generate a second replica enhanced reference voltage based on the input reference voltage; and a low noise buffer configured to selectively receive one of the filtered reference voltage or the second replica enhanced reference voltage and to generate a buffer reference voltage for the high voltage LDO regulator, wherein one of the filtered reference voltage or the second replica enhanced reference voltage is transmitted to the high voltage LDO regulator based on an operational state of the RC filter, the operational state of the RC filter includes one or more of a start-up state, a settling state, or a settled state, and the high voltage LDO regulator is configured to generate the output based on the buffer reference voltage.
Facts
- Company
- Samsung (Samsung Electronics Co., Ltd.)
- Official title
- DEVICE FOR OPTIMIZING NOISE AT AN OUTPUT OF HIGH VOLTAGE LOW-DROPOUT REGULATOR
- Publication number
- US20260329320A1
- Application number
- 19381298
- Filed
- Nov 6, 2025
- Published
- Oct 22, 2026
- Inventors
- 2
- Claims
- 20
Classified under
G05F 1/575 Physics & computingG05F 1/468 Physics & computingMore from Samsung in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.