Power supply circuit of PAM4 optical module and power supply control method of PAM4 optical module

Abstract

The invention provides a power supply circuit of a PAM4 optical module and a power supply control method of the PAM4 optical module. According to the power supply circuit of the PAM4 optical module, aGPIO interface of an MCU is connected with the input end of a voltage converter, the input end of a first voltage stabilizer, the input end of a second voltage stabilizer and the input end of a switching tube; the output end of the voltage converter is respectively connected with the first voltage stabilizer, the second voltage stabilizer and the switching tube; the output end of the first voltage stabilizer is connected with a first power supply pin; the output end of the second voltage stabilizer is connected with a second power supply pin; and the output end of the switching tube is connected with a third power supply pin. According to the power supply circuit, the switching time sequence of the voltage converter, the first voltage stabilizer, the second voltage stabilizer and the switching tube can be controlled through the MCU; therefore, the power supply time sequence of each power supply pin input to the DSP is consistent with the power-on and power-off time sequence of each power supply pin of the DSP, that is, the power-on and power-off time sequence of each power supply pin of the DSP can be ensured, so that the PAM4 optical module can work normally without generating surge current.

Description

technical field [0001] The present invention relates to the technical field of the PAM4 optical module, in particular to a power supply circuit of the PAM4 optical module and a power control method of the PAM4 optical module. Background technique [0002] Since the PAM4 (Pulse Amplitude Modulation 4, pulse amplitude modulation) optical module consumes a lot of power, the DSP (Digital Signal Processing, digital signal processing) chip is mainly powered by 1.8V, 1.2V, 0.8V, 0.77V, 0.59V and other power supplies , Different pins use different power supplies to reduce the power consumption of the entire module during normal operation. The reduction in power consumption is also conducive to the heat loss and heat dissipation design of the entire module, which can improve the performance, stability and reliability of the optical module. Although the DSP chip of the PAM4 optical module uses these low-level power supplies, and the main chip of the NRZ (Non-Return-to-Zero, non-return...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a power supply circuit of a PAM4 optical module and a power control method of a PAM4 optical module, so as to alleviate the technical problem that the existing PAM4 optical module power supply circuit cannot guarantee the power-on sequence of each power supply pin of DSP

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