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Google patents oscillator that adjusts signal speed via delay paths

Patent drawing
Patent drawing from the official filing.

Google describes a circuit component called a digitally controlled oscillator that uses a grid of delay stages to create different signal paths. By turning specific stages on or off, the device selects a path to change how long a signal takes to travel, effectively tuning its frequency. The design also includes devices to adjust how each stage responds to voltage changes.

Why it mattersThis filing details a method for creating precise, adjustable timing signals within computer chips, which is a standard improvement for hardware stability and performance.

In the filing’s own words

Systems and methods for a tunable digitally controlled oscillator. In one aspect, an apparatus includes one or more lattices of delay stages. Multiple, different paths may be selected through the lattices. Each path begins at a first delay stage with an input connected to a signal input node and ends at a second delay stage with an output connected to a signal output node.

What exactly they claim (claim 1)

1. An apparatus, comprising: a first signal input node; a first signal output node; and a plurality of delay stages arranged in a first lattice, each delay stage operable to receive a signal as input and generate a delayed instance of the signal as output, wherein: the plurality of delay stages are connected to each other in the first lattice to define a plurality of sequential ordinal paths, and each sequential ordinal path comprises a unique proper subset of the plurality of delay stages; each sequential ordinal path subsequent to a prior sequential ordinal path includes in its unique proper subset of delay stages at least a delay stage from each prior ordinal path; each sequential ordinal path comprises a plurality of delay stages; and each sequential ordinal path begins at a first delay stage with an input connected to the first signal input node and ends at a second delay stage with an output connected to the first signal output node; and wherein: the plurality of delay stages is operable to receive first control data defining a selected path and the control data causes each delay stage to selectively activate or deactivate to select one of the sequential ordinal paths as the selected path for propagating an input signal received at the input of the first delay stage of the selected path to the output of the second delay stage of the selected path; and each delay stage is coupled to a corresponding voltage sensitivity adjustor device and a voltage sensitivity of the delay stage is adjustable by the voltage sensitivity device.

Facts

Company
Google (Google LLC)
Official title
TUNABLE DIGITALLY CONTROLLED OSCILLATOR
Publication number
US20260312594A1
Application number
19716856
Filed
Jun 23, 2026
Published
Oct 8, 2026
Inventors
2
Claims
19

Classified under

H03L 7/0991 Electricity & electronicsH03L 7/0814 Electricity & electronics

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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.