Lukas Kull, Danny Luu, et al.
ISSCC 2017
An 8b digital-to-analog converter (DAC) based transmitter (TX) in 7 nm CMOS for cryogenic quantum applications is presented. It operates at up to 40GS/s using pushpull output stages with polysilicon resistors (peres) and employs an A/B weighting concept within the DAC output stages for area and clock load reduction. A 32 kB static random-access memory (SRAM) is included for direct radio frequency (RF) arbitrary waveform generation (AWG) as well as a sequencer state machine that performs replays with arbitrary sequence length. The DAC is tailored for integrated qubit control signal generation at the 4 K stage of a cryostat, and includes an external trigger to synchronize multiple DAC TXs. We demonstrate the operation of the circuitry, with a total area of 0.1mm2 and efficiency of 3.2 pJ/b, down to a temperature of 4 K. The work represents one of the smallest footprint cryogenic controllers with on-chip memory realized to date.
Lukas Kull, Danny Luu, et al.
ISSCC 2017
Alessandro Cevrero, Ilter Ozkaya, et al.
ISSCC 2019
Thomas Toifl, Christian Menolfi, et al.
IEEE Journal of Solid-State Circuits
Toke M. Andersen, Florian Krismer, et al.
APEC 2013