Large-scale thermal modulation phase shifter driving method and system

Abstract

The invention belongs to the field of integrated circuit design, and particularly relates to a large-scale thermal modulation phase shifter driving method and system, and the method comprises the steps: generating N reference digital PWM signals through employing a high-frequency clock signal, and carrying out the time domain combination of the N reference digital PWM signals independently through employing K N-bit digital control signals, obtaining k digital PWM signals used for correspondingly driving K power tubes; and driving the K thermal modulation phase shifters by the K power tubes. According to the invention, N reference digital PWM signals are firstly generated, and then a plurality of control signals are adopted to carry out time domain combination on the N reference digital PWM signals to obtain a digital PWM signal which is finally used for driving a power tube, so that the power consumption and the area of the whole driving scheme are reduced in a mode of multiplexing the N reference digital PWM signals; and large-scale thermal modulation phase shifter driving with small area, low cost, low power consumption and high efficiency is realized. The method can be used for driving the optical thermal phase shifter.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, and more specifically relates to a driving method and a driving system of a large-scale thermal phase shifter. Background technique [0002] As semiconductor process nodes approach physical size limits, Moore's Law is coming to an end. As a potential development path in the post-Moore era, integrated photonics has received extensive research and attention. For current on-chip integrated optical devices or systems, thermally adjustable phase shifters have been widely researched and used as high-efficiency, low-loss phase shifters. It not only helps to achieve flexible adjustment of integrated photonic systems: for example, in optical artificial intelligence, the optical transmission matrix of photonic devices can be adjusted by adjusting the phase shift of thermally adjustable phase shifters, which is convenient for efficient calculation; in silicon-based optical phase control In the arr...

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Problems solved by technology

[0006] The present invention provides a driving method and a driving system for a large-scale thermal phase shifter, which are used to solve the problem of driving each thermal regulator in the digital PWM signal driving power tube scheme for thermal phase shifter driving in the prior art. A separate digital PWM signal generation module is required, so it is not suitable for large-scale thermally adjustable phase shifter driven technical problems

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