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Quantum sensing research / 2026
An in-development quantum-sensing research project centered on photodiode readout, signal conditioning and control electronics.
A research project developing a documented control and readout platform for QuanDiam-Mag — a photodiode-based, signal-conditioned quantum-sensing chain. No measurement or performance claims are made beyond what the engineering record supports.
01Project brief
This page reports the documented state of the work. It does not represent qualification, manufacturing release, or operational deployment unless stated explicitly.
02Notes
QuanDiam focuses on the control and readout electronics that sit between a photodiode front end and a host computer. The goal is a documented platform that supports quantum-sensing research without manufacturing any measurement or performance claims that the current record does not support.
All public claims about this project are kept at the level of the engineering record: which subsystems exist, what their intended role is, and which parts of the chain are still being developed.
03Engineering record
Components below describe the parts of the QuanDiam-Mag chain that are present in the current package. Specific component values and configurations may evolve as the design is iterated.
04Architecture
A high-level view of the signal path as it exists in the current package. Boxes in italic are subsystems under active development.
Incident light is converted to a small photocurrent by a photodiode in the detector block.
The photocurrent is converted to a voltage by a transimpedance amplifier. The TIA topology has been simulated; a discrete implementation is in development.
An ADS1256 24-bit Σ-Δ digitises the conditioned voltage. The ADC is selected for low noise and high dynamic range at low sample rates.
The ESP32-S3 aggregates samples, drives the synthesiser and bias DAC, and exposes the data to a host over USB / serial.
An ADF4351 wideband synthesiser provides the RF stimulus, and an MCP4725 DAC provides slow bias / set-point outputs.
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