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mosfet digital output circuit

A digital output and circuit technology, applied in the direction of logic circuit, logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., can solve the problem of real-time protection of digital output status and inability to judge digital output Problems such as normal operation, to achieve the effect of reducing the number of components and reducing the complexity of the circuit

Active Publication Date: 2019-12-31
CRRC DALIAN R & D CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current digital output circuit using MOSFETs as switching elements cannot judge whether the digital output is working normally, so it cannot protect the digital output status in real time

Method used

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] At present, the digital output circuit using MOSFET as the switching element has no output state feedback detection circuit, so it is impossible to judge whether the MOSFET is normally turned on or off, and then it is impossible to judge whether the digital output is working normally, so it is impossible to protect the digital output state i...

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Abstract

The invention provides a MOSFET digital-value output circuit comprising a MOSFET and a monitoring circuit. The MOSFET is separately connected to a main controller and a load. The MOSFET is configured to control an on / off state of the load according to a digital-value output signal outputted by the main controller. The monitoring circuit is separately connected to the MOSFET and the main controller. The monitoring circuit is configured to monitor an on / off signal of the MOSFET and, according to the on / off signal of the MOSFET, send a digital-value output state feedback signal to the main controller. The technical solution provided by the present invention can realize real-time monitoring of the output state of the MOSFET by means of the monitoring circuit, thereby realizing real-time monitoring and maintenance of the digital-value output state.

Description

technical field [0001] The invention relates to digital output circuit technology, in particular to a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET) digital output circuit. Background technique [0002] The digital output circuit can convert the weak digital signal output by the computer into a digital driving signal that can control the production process, and it is widely used in industrial design. [0003] According to the different loads of the digital output circuit, such as: indicator lights, relays, contactors, electrodes, valves and other loads, different power amplifier devices can be selected as switching elements to form a switch drive circuit. At present, digital output circuits generally use relays or MOSFETs as switching elements. Among them, the drive power of relays is relatively small. In high-power applications, MOSFETs are often used as switching elements. [0004] However, current digital out...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/003H03K19/0185H03K19/0944
CPCH03K19/00361H03K19/018557H03K19/0944
Inventor 郑光磊隋德磊王鸿雪张云鹏李楠
Owner CRRC DALIAN R & D CO LTD
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