Large-scale thermal modulation phase shifter driving method and system

A driving method and technology of a driving system, applied in the direction of pulse duration/width modulation, etc., can solve the problems that are not suitable for large-scale thermal phase shifter driving, and achieve low power consumption, low cost, and reduced power consumption and area Effect

Pending Publication Date: 2021-06-01
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Large-scale thermal modulation phase shifter driving method and system
  • Large-scale thermal modulation phase shifter driving method and system
  • Large-scale thermal modulation phase shifter driving method and system

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Embodiment 1

[0038] A driving method for a large-scale thermally adjustable phase shifter, such as figure 1 shown, including:

[0039] Using a high-frequency clock signal to generate N reference digital PWM signals, and using K N-bit digital control signals to independently combine the N reference digital PWM signals in the time domain to obtain K for correspondingly driving K power transistors digital PWM signal;

[0040] K thermal phase shifters are driven by K power tubes.

[0041] In this embodiment, by multiplexing N reference digital PWM signals, the power consumption and area of ​​the overall driving scheme are reduced, and a small-area, low-cost, low-power consumption, high-efficiency large-scale thermally adjustable phase shifter drive is realized. This scheme can be used to drive the optical thermal phase shifter.

[0042] Preferably, the N reference digital PWM signals are: the period is the same as that of all the digital PWM signals used to drive the power tube, and the duty ...

Embodiment 2

[0049] A driving system for a large-scale thermal phase shifter, including: a PWM signal generating module and K power tubes. Wherein, the PWM signal generation module is used to generate N reference digital PWM signals by using a high-frequency clock signal, and use K N bit digital control signals to independently perform time-domain combination on the N reference digital PWM signals to obtain K The digital PWM signal used to drive K power tubes correspondingly; the K power tubes are used to drive K thermal phase shifters.

[0050] Preferably, the PWM signal generation module includes: a reference signal generation unit and a combination unit.

[0051] The reference signal generation unit is used to process the high-frequency clock signal to generate N reference digital PWM signals; the combination unit includes K combination subunits, and each combination subunit is independently used to combine the N reference digital PWM signals Combining in the time domain and correspond...

example 1

[0058] Example 1: In a silicon-based optical phased array system, beam scanning is often achieved by controlling the phase relationship between the outgoing light waves of adjacent array elements, and phase adjustment often uses a thermally adjustable phase shifter to control the phase relationship. Therefore, a high-precision, linear thermal phase shifter phase adjustment is required to achieve high-precision beam scanning.

[0059] Such as Image 6 As shown, the thermally tunable phase shifter driving scheme based on Embodiment 1 or Embodiment 2 can be used to provide precise and linear phase adjustment to multiple thermally tunable phase shifters in a silicon-based optical phased array system, thereby achieving high Precision beam scanning. Compared with other solutions, this solution has the advantages of low power consumption, small area and high precision.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K7/08
CPCH03K7/08
Inventor 谭旻汪宇航汪志城明达
Owner HUAZHONG UNIV OF SCI & TECH
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