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Google patents hardware for tuning quantum computer signals

Patent drawing
Patent drawing from the official filing.

Google has filed a patent for a controller that creates precise electrical signals to manipulate qubits, the basic units of quantum computing. The system uses digital-to-analog converters to turn digital instructions into analog waves, then uses tunable couplers to adjust the strength of these waves before combining them into a final control signal.

Why it mattersThis filing details the specific electronic circuitry needed to control quantum bits, which is a foundational step in building stable quantum processors.

In the filing’s own words

Techniques are described for operating a qubit controller to generate a signal to apply to a qubit using a tunable coupler that controls the amplitude of at least part of the signal. The qubit controller may comprise a plurality of digital-to-analog converters that each convert digital values to an analog waveform. The qubit controller may further comprise a plurality of tunable couplers each coupled to a respective DAC that adjusts the amplitude of the analog waveform from the respective DAC. The tunable couplers thereby produce a plurality of analog waveforms, which may be combined to produce a signal to apply to the qubit. In some embodiments, the tunable couplers may each be configured to receive a respective control signal that dictates the scaling factor which that tunable coupler applies to the analog waveform.

What exactly they claim (claim 1)

1. (canceled)

Facts

Company
Google (Google LLC)
Official title
Techniques for Generating Qubit Control Signals
Publication number
US20260330283A1
Application number
19557945
Filed
Mar 5, 2026
Published
Oct 22, 2026
Inventors
3
Claims
21

Classified under

G06N 10/40 Physics & computingH03K 3/38 Electricity & electronicsH03K 19/195 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.