Optical module circuit and optical module

Abstract

The invention discloses an optical module circuit and an optical module, the optical module circuit comprises a power supply input end, a transimpedance amplifier, a power supply circuit, a slow power-on circuit, a voltage division circuit and a discharge circuit, wherein the power supply circuit provides a working voltage for a photoelectric detector when a power supply voltage input by a power supply input end is greater than or equal to a first preset voltage value; the slow power-on circuit controls the trans-impedance amplifier to be powered on earlier than the photoelectric detector whenthe power supply voltage input by the power supply input end is greater than or equal to a first preset voltage value. When the power supply voltage input by the power supply input end is smaller than a first preset voltage value, the voltage division circuit divides the power supply voltage of the power supply circuit so as to accelerate the power-off speed of the power supply circuit. When thepower supply voltage input by the power supply input end of the discharge circuit is smaller than a first preset voltage value, the power supply circuit is powered off earlier than the trans-impedanceamplifier. The optical module circuit is used for reducing the triggering frequency of overcurrent protection.

Description

technical field [0001] The invention relates to the technical field of optical modules, in particular to optical module circuits and optical modules. Background technique [0002] In the current optical module design, the APD (avalanche diode) is designed with an overcurrent protection action to avoid damage to the optical module. However, when performing over-current protection, the protection action is generally to control the optical module to stop working, which will affect the normal operation of the optical module, thus forming the impression that the product often fails in the mind of the customer. Therefore, when designing the optical module, It is necessary to avoid the overcurrent phenomenon of the APD as much as possible, and reduce the number of triggering of the overcurrent protection. Contents of the invention [0003] The main purpose of the present invention is to provide an optical module circuit, aiming at reducing the triggering times of overcurrent pro...

AI Technical Summary

Problems solved by technology

However, when performing over-current protection, the protection action is generally to control the optical module to stop working, which will affect the normal operation of the optical module, thus forming the impression that the product often fails in the mind of the customer. Therefore, when designing the optical module, It is necessary to avoid the overcurrent phenomenon of the APD as much as possible and reduce the number of triggers of the overcurrent protection

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