Superconducting qubit control electronics - Part 1/2: system overview and control hardware

The need for numerous analog control lines presents a unique challenge in building control systems for large quantum processors. In the context of superconducting Josephson qubits, particular requirements for the control lines include phase matching across all channels, low noise, and minimal drift. In this talk, we discuss the design, implementation, and challenges encountered in building our next generation modular control system. Using this system in a configuration with 256 DACs, 84 IQ mixers, 24 ADC, and 16 microwave sources, we will show preliminary measurements on Bristlecone, our 72-qubit processor.