Superconducting qubit control electronics - Part 2/2: dispersive measurement

Dispersive measurement of transmon-type qubits requires a microwave receiver with nearly 100 dB gain and ~100 mK system noise temperature. Recent increases in qubit number have introduced a new set of requirements on our receivers. These constraints include the need for smaller parts at cryogenic and room temperature stages, higher reliability, lower cost, and uniformity across multiple systems to ensure agreement between staging and production systems. In this talk, we discuss the design and implementation of our dispersive measurement system that meets our integration needs while maintaining performance, with particular focus on the room temperature electronics. We present preliminary results on our latest chips.