RF Cryo-CMOS/Superconductor circuits co-design

Published : 1 January 2023

Quantum computing is nowadays a strong field of research at CEA-LETI and in numerous institutes and companies around the world. The Quantum Silicon Grenoble project, including CEA-LETI, CEA-IRIG and Néel Institut, aims to achieve a quantum computer based on quantum bits (qubits) in silicon. The operating conditions of qubits (cryogenic temperatures = 1K, high frequencies of the order of GHz, high signal density) require the development of suitable components and technological bricks. In particular, the combination of superconducting inductors and cryogenic electronic offers many perspectives for the design and production of demonstrators of blocks and compact RF circuits, with very low consumption and very low noise.

After getting to grips with the physics of superinductors carried out in the CEA-LETI clean rooms and the simulation tools for the design of cryoelectronics (ADS, HFSS), you will contribute to the provision of a scalable model of superinductors. In collaboration with the circuit design teams, the implementation of this model will allow you to co-design innovative superconducting/cryo-CMOS blocks and RF circuits. You will thus search to improve compactness and performance (consumption, phase noise) of an RF oscillator (VCO) and you will study and optimize a low noise amplifier (LNA) integrating compact inductive components. A circuit demonstrator combining the advantages of the two associated technologies will be produced.

You will be hosted into the Quantum Laboratory of the CEA-LETI which designs and develops the technological bricks for the control of qubits on silicon, in an environment ranging from fundamental physics to new technologies of nano-electronics.

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