Detection device of DMX512 signal amplification circuit and DMX512 signal amplification circuit
A signal amplification circuit, DMX512 technology, applied in the direction of electrical components, etc., can solve the problems of inability to indicate whether the output of the signal amplification circuit has errors, low reliability, etc.
Pending Publication Date: 2021-10-26
广州北岛光电实业有限公司
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Problems solved by technology
[0003] The DMX512 signal amplifying circuit is mainly used to reshape the weakened RS-485 signal to restore it to a 485 differential signal with steep edges. At present, the signal amplifying circuit uses traditional analog circuits to realize the above functions, and cannot indicate the output of the signal amplifying circuit. Whether there is an error, so the reliability of the current DMX512 signal amplification circuit is low
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[0041] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.
[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.
[0043] It can be understood that the terms "first", "second" and the like used in this application may be...
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The invention relates to a detection device of a DMX512 signal amplification circuit and the DMX512 signal amplification circuit. The detection device of the DMX512 signal amplification circuit comprises a controller and an indication module, the controller is electrically connected with a TTL signal input end of a first RS-485 chip of the DMX512 signal amplification circuit, a forward output end of a differential signal and a reverse output end of the differential signal, and the controller is used for receiving a TTL signal, a first differential signal and a second differential signal. According to the TTL signal, the first differential signal and the second differential signal, whether the output signal of the DMX512 signal amplification circuit chip has an error is judged, and an indication signal is output according to the judgment result; and the indication module carries out indication according to the indication signal, that is, under the control of the controller, the state of the indication module when the DMX512 signal amplification circuit outputs a wrong signal is different from the state when the DMX512 signal amplification circuit outputs a correct signal, so as to indicate whether the DMX512 signal amplification circuit outputs a wrong signal or not, thereby improving the reliability of the circuit.
Description
technical field [0001] This application relates to the field of RS-485 chip technology, in particular to a detection device for a DMX512 signal amplifying circuit and a DMX512 signal amplifying circuit. Background technique [0002] The DMX512 protocol is a data dimming protocol proposed by the American Stage Lighting Association (USITT), which provides a protocol standard for communication between lighting controllers and lighting equipment. The protocol is proposed to use digital signals to control lighting equipment. Provides a good standard. [0003] The DMX512 signal amplifying circuit is mainly used to reshape the weakened RS-485 signal to restore it to a 485 differential signal with steep edges. At present, the signal amplifying circuit uses traditional analog circuits to realize the above functions, and cannot indicate the output of the signal amplifying circuit. Whether there is an error, so the reliability of the current DMX512 signal amplification circuit is low....
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Login to View More IPC IPC(8): H05B45/00
CPCH05B45/00Y02B20/40
Inventor 吴明亮
Owner 广州北岛光电实业有限公司