Incoming links: Keysight
Agilent Technologies Updated 2025-07-16
In a way, Agilent represents the most grassroots electronics parts of HP from before they became overly invested in laptops and fell.
Breadboard Updated 2025-07-16
This is how electronic circuits are normally prototyped!
Once you validate them like this, the next step is usually to move on to printed circuit boards for more reliable production setups.
Breadboards are a thing of beauty and wonder.
Point-to-point constructions on woden boards
. Source. Predecessors to breadboards from where the name came. A thing of beauty, so vintage. You could actually write stuff on those with a pencil!
Breadboards - Trash or Treasure? by Keysight (2020)
Source. CuriousMarc Updated 2025-07-16
Has been going wild with restoration and reverse engineering of the Apollo moon mission.
Inside the WILD Lab of CuriousMarc by Keysight Labs (2022)
Source. - youtu.be/qwocVH3_1Eo?t=841 the IBM System/360 is insane!
Electronic lab equipment Updated 2025-07-16
A Perfect Electronics Bench? by Keysight (2021)
Source. Quantum control systems use FPGAs Updated 2025-07-16
It seems that all/almost all of them do. Quite cool.
FPGA Architecture of the Quantum Control System by Keysight (2022)
Source. They actually have a dedicated quantum team! Cool. Transmon Updated 2025-07-16
Used e.g. in the Sycamore processor.
The most basic type of transmon is in Ciro's ASCII art circuit diagram notation, an LC circuit e.g. as mentioned at youtu.be/cb_f9KpYipk?t=180 from Video "The transmon qubit by Leo Di Carlo (2018)":
+----------+
| Island 1 |
+----------+
| |
X C
| |
+----------+
| Island 2 |
+----------+youtu.be/eZJjQGu85Ps?t=2443 from Video "Superconducting Qubits I Part 1 by Zlatko Minev (2020)" describes a (possibly simplified) physical model of it, as two superconducting metal islands linked up by a Josephson junction marked as The circuit is then analogous to a LC circuit, with the islands being the capacitor. The Josephson junction functions as a non-linear inductor.
X in the diagram as per-Ciro's ASCII art circuit diagram notation:+-------+ +-------+
| | | |
| Q_1() |---X---| Q_2() |
| | | |
+-------+ +-------+Others define it with a SQUID device instead: youtu.be/cb_f9KpYipk?t=328 from Video "The transmon qubit by Leo Di Carlo (2018)". He mentions that this allows tuning the inductive element without creating a new device.
Calibration of Transmon Superconducting Qubits by Stefan Titus (2021)
Source. Possibly this Keysight which would make sense.