Apple patents circuit that stabilizes voltage for chip components
Apple describes a circuit design that creates a stable voltage reference for electronic components. It uses transistors that first act as a switch to connect power, then adjust to keep the voltage at a specific target level.
In the filing’s own words
A system for generating a voltage reference may include a feedback path coupled to a first power rail, a reference circuit coupled to a second power rail, an output transistor, and a feedback transistor. The output transistor operates as switch during a first time to connect the first power rail to the voltage reference, then operates in saturation during a second time to regulate the voltage reference to a target voltage set by the reference circuit based on the feedback path driving the gate of the output transistor via a resistance. Other aspects are also described and claimed.
What exactly they claim (claim 1)
1. A system for generating a voltage reference, comprising: a feedback path coupled to a first power rail; an output transistor having a gate coupled to the feedback path and to a second power rail through a resistance, a source coupled to the first power rail, and a drain coupled to a voltage reference; and a feedback transistor having a gate coupled to the voltage reference and a drain coupled to the feedback path, wherein the output transistor operates as switch during a first time to connect the first power rail to the voltage reference, then operates in saturation during a second time to regulate the voltage reference to a target voltage based on the feedback path driving the gate of the output transistor.
Facts
- Company
- Apple (Apple Inc.)
- Official title
- Self-Biased Voltage Reference Generators
- Publication number
- US20260288187A1
- Application number
- 19085447
- Filed
- Mar 20, 2025
- Published
- Sep 24, 2026
- Inventors
- 2
- Claims
- 20
Classified under
G05F 3/262 Physics & computingG05F 1/575 Physics & computingMore from Apple 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.