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Samsung patents RF circuit that protects power amplifiers from voltage spikes

This patent describes a radio frequency circuit designed to prevent damage to a power amplifier, a component that boosts signal strength in devices like phones. It uses a switching mechanism that automatically reroutes the signal to a safe resistor if the voltage gets too high, instead of letting it pass through the sensitive amplifier.

Why it mattersThis is a routine hardware improvement that helps ensure electronic components last longer by preventing electrical surges from causing permanent damage.

In the filing’s own words

According to an embodiment, a Radio Frequency (RF) circuit comprises: a power amplifier; a switching circuit configured to electrically connect the power amplifier to a first switch in case that an output voltage of the power amplifier does not exceed a threshold voltage and to electrically connect the power amplifier to a terminating resistor in case that the output voltage of the power amplifier exceeds the threshold voltage; a first electrical path formed between the power amplifier and the switching circuit; and a first diode connected to a second electrical path formed from a first point of the first electrical path to the switching circuit, the first diode connected between the first point and the switching circuit.

What exactly they claim (claim 1)

1. A Radio Frequency (RF) circuit comprising: a power amplifier; a switching circuit configured to electrically connect the power amplifier to a first switch in case that an output voltage of the power amplifier does not exceed a threshold voltage and to electrically connect the power amplifier to a terminating resistor in case that the output voltage of the power amplifier exceeds the threshold voltage; a first electrical path between the power amplifier and the switching circuit; and a first diode connected to a second electrical path from a first point of the first electrical path to the switching circuit, the first diode connected between the first point and the switching circuit.

Facts

Company
Samsung (Samsung Electronics Co., Ltd.)
Official title
RF circuit for preventing damage to power amplifier
Patent number
US12750014B2
Application number
18369943
Filed
Sep 19, 2023
Granted
Sep 29, 2026
Inventors
5
Claims
20

Classified under

H03F 1/52 Electricity & electronicsH03F 1/30 Electricity & electronicsH03F 3/245 Electricity & electronicsH03F 2200/451 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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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.