Method for synchronizing trigger signals between board cards of quantum measurement and control system

Abstract

The invention provides a method for synchronizing trigger signals between board cards of a quantum measurement and control system, which comprises the following steps of: generating a reference clock and trigger signals by using a clock generator, and supplying the reference clock and the trigger signals to each board card needing to be synchronously triggered through equal-length paths; in the board card, a system clock and a sampling clock which has the same frequency with the system clock but is offset are generated through a clock management unit; sampling an input trigger signal by using a sampling clock and a system clock to obtain a sampling result; obtaining a one-hot code; cross-clock-domain data synchronization is completed on a coding result through a fast and slow synchronization module; performing sampling result judgment on the synchronized data; according to a sampling confidence coefficient threshold value, in combination with a judgment result in the previous step, obtaining a conclusion whether the currently sampled trigger signal is reliable or not; and if the sampling result is reliable and the rising edge of the trigger signal is sampled, the board card sends the waveform signal, so that the aim of synchronizing the waveform signal sent by each board card is fulfilled. The method is convenient to implement, simple in process, efficient and stable.

Description

technical field [0001] The invention relates to a method for synchronizing trigger signals between boards of a quantum measurement and control system, and belongs to the technical fields of FPGA design and quantum measurement and control instruments. Background technique [0002] At present, the electronic information technology industry is developing rapidly, and high-performance programmable logic chips appear, which can realize many complex application requirements. At present, quantum computing is developing rapidly, and the number of qubits that need to be controlled at the same time is increasing. This requires measurement and control equipment to be able to simultaneously send out multiple waveform signals. At present, there are many synchronization methods for measurement and control equipment on the market, but the general implementation scheme is complicated, and high-frequency clocks are required for sampling and other conditions, which have too many restrictions ...

AI Technical Summary

Problems solved by technology

At present, there are many synchronization methods for measurement and control equipment on the market, but the general implementation scheme is complex, and high-frequency clocks are required for sampling and other conditions, which have too many restrictions on the way users use them.