A Self-controlling Circuit of Power Start-Up Sequence Suitable for Complicated Digital-Analog Mixed System

Abstract

The present application discloses a self-controlling circuit for power supply start-up sequence suitable for complex digital-analog hybrid systems. The circuit includes: various integrated circuits, power supply modules and passive delay networks in complex digital-analog hybrid systems; Circuits, including digital processors, digital-analog mixers, clock distributors and special devices; power supply modules, including switching power supplies, linear regulators and special power supply modules, switching power supplies are used for the digital part of digital processors and digital mixers Power supply, the linear voltage regulator is used to supply power to the analog part of the digital mixer, and the dedicated power supply module is used to supply power to the clock distributor or special devices; the passive delay network, including resistors and capacitors, is connected with the switching power supply for controlling the switching power supply It is started according to a preset startup sequence, wherein the resistance value and the capacitance value are set according to a preset threshold level of the enable terminal of the switching power supply. The application solves the technical problem of complicated circuit design in the prior art.

Description

Technical field [0001] The present application relates to the field of electronic circuit technology, and more particularly to a power supply start timing self-control circuit suitable for complex digital mold hybrid systems. Background technique [0002] As the communication system is constantly expanding, a variety of digital processors, high-speed digital-to-a-mixing devices or dedicated devices are integrated in high speed modulus hybrid processing systems, and the power supply is a prerequisite for the entire system. Prerequisites. Strictly control the power-on timing ensures that the system enters a good working condition. At present, the start timing control of the power supply is mainly based on the system switching process: [0003] The first, use the power timing control chip or programmable logic device CPLD to implement system power start timing, specifically, set a power supply timing control chip between the power module and a variety of digital processors, high spe...

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Problems solved by technology

[0006] The technical problem to be solved by this application is: Aiming at the relatively complex problem of system circuit design in the prior art, this application provides a self-control circuit for power start sequence suitable for complex digital-analog hybrid systems. The solution provided by the embodiment of this application Among them, not only the digital processor and the digital part of the digital-analog mixer can be powered by the switching power supply, the linear regulator can supply the analog part of the digital-analog mixer, and the dedicated power supply module can supply power for the clock distributor or special devices; Controlling the automatic start-up sequence of the switching power supply through the passive delay network can not only avoid the need to add additional power supply sequence control chips or programmable devices in the start-up sequence control of the power supply, but also need to increase the power supply of the power supply sequence control chip or programmable devices The circuit can also realize the precise control of the timing of the switching power supply, thereby simplifying the design complexity of the system power supply circuit and improving the reliability of the system

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