Automatic power regulating circuit applied to optical communication
A technology for automatic power and circuit adjustment, applied in the field of communication, can solve the problems such as the great influence of the luminous power of light-emitting diodes and the deterioration of communication quality, and achieve the effects of simple circuit structure and control principle, maintaining communication quality, and improving adjustment accuracy.
Pending Publication Date: 2018-01-19
南京美辰微电子有限公司
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Problems solved by technology
[0004] For this reason, the object of the present invention is to propose an automatic power adjustment circuit applied to optical communication, to solve the problem that the luminous power of light-emitting diodes is greatly affected by the external environment, which will lead to a decrease in communication quality
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[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0027] The present invention provides an automatic power adjustment circuit applied to optical communication, refer to the attached figure 1 As shown, it includes an optical transmission circuit 1, a photoelectric conversion circuit 2, and a power regulation feedback circuit 3; the photoelectric conversion circuit 1 receives the optical signal emitted by the optical transmission circuit 1, and the output end of the photoelectric conversion circuit 2 is connected to the power regulation feedback circuit 3, and the power regulation ...
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The invention provides an automatic power regulating circuit applied to optical communication. The automatic power regulating circuit comprises a light emitting circuit, a photoelectric conversion circuit and a power regulation feedback circuit; the photoelectric conversion circuit receives a light signal emitted by the light emitting circuit, an output end of the photoelectric conversion circuitis connected with the power regulation feedback circuit, and the output end of the power regulation feedback circuit is connected with a control end of the light emitting circuit. According to the automatic power regulating circuit, the voltage obtained by photoelectric conversion is compared with the threshold of a window comparator, the comparator of an analog part outputs a corresponding signalto a digital logic circuit and then outputs 12-bit data to a bias current circuit so as to regulate the bias current of a light emitting diode to change the light transmitting power of the light emitting diode, and finally the voltage signal output by the light emitting diode is kept near a window common mode level so as to maintain the light transmitting power of the light emitting diode withina set range and to maintain the communication quality.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to an automatic power adjustment circuit applied to optical communication. Background technique [0002] In modern communication systems, optical fiber communication is widely used in high-speed transmission systems because of its large information capacity, long relay distance, and fast transmission speed. The two most important devices are light-emitting diodes and photodiodes. The former As the transmitting part in the optical fiber communication system, the current is converted into optical power output; while the latter is the receiving part, which converts the received optical power into an electrical signal. For light-emitting diodes, their luminous power is greatly affected by the external environment and has no consistency, which will inevitably lead to a decline in communication quality. Therefore, it is necessary to introduce an automatic power adjustment circuit to...
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Login to View More IPC IPC(8): H03L5/02H04B1/40
Inventor 吴烜施家鹏邹闽中
Owner 南京美辰微电子有限公司