Qubit Control Board

Superconducting Qubit Control Board

Custom FPGA-based control board for generating microwave I/Q signals used to drive superconducting qubits.

Project Overview

This project is a hardware and FPGA control system for producing shaped control signals for superconducting qubit experiments. The board uses an FPGA to generate digital waveform data, a high-speed DAC to convert that data into analog I/Q signals, and an RF stage to upconvert the signals to microwave frequencies.

Main Components

• FPGA digital control and waveform generation
• High-speed DAC for analog I/Q output
• TRF372017 RF modulator / PLL / VCO stage
• SPI control for configurable RF components
• Low-pass filtering between DAC and RF stages
• On-board power regulation and decoupling
• RF output through a controlled-impedance path to SMA

Design Goals

• Generate programmable I/Q waveforms
• Support microwave signal generation for qubit control
• Keep the design modular and testable
• Document RF layout, DAC interfacing, FPGA control, and signal integrity design

Current Status

This project is currently in development. The main focus is schematic design, PCB layout, FPGA communication, and validating the signal chain from the FPGA to the RF output.