阅读说明：本技术 一种光功率检测电路的升压模块 (Boosting module of optical power detection circuit ) 是由 徐浩 陈传荣 于 2019-08-21 设计创作，主要内容包括：本发明公开了一种光功率检测电路的升压模块,包括升压芯片,升压芯片引脚IN与电容C1027的一端连接,引脚LX1和LX2与电感L12和二极管D21连接,二极管D21的负极与电阻R949的一端连接,另一端与电阻R948的一端连接,引脚BIAS与电阻R162的一端连接,另一端与电容C1028连接,电容C136一端与电阻R162连接,另一端与地极连接,引脚APD与电阻R164的一端连接,引脚CLAMP与电阻R174的一端连接,引脚MOUT与电阻R956、R1124连接,电容C124与R1124并联连接,引脚RLIM与电阻R169的一端连接,引脚ILIM与电阻R169的一端连接,另一端与电阻R175连接,电容C171与电阻R175并联连接,引脚SGND与地极连接,升压模块,引脚SGND与地极连接,起到很好的抗干扰作用,电容C124与R1124并联连接可以很好的过滤掉电路中的杂波,使上报值准确。(The invention discloses a boosting module of an optical power detection circuit, which comprises a boosting chip, wherein a pin IN of the boosting chip is connected with one end of a capacitor C1027, pins LX1 and LX2 are connected with an inductor L12 and a diode D21, the cathode of the diode D21 is connected with one end of a resistor R949, the other end of the diode D21 is connected with one end of a resistor R948, a pin BIAS is connected with one end of a resistor R162, the other end of the pin BIAS is connected with a capacitor C1028, one end of a capacitor C136 is connected with a resistor R162, the other end of the capacitor C136 is connected with a ground pole, a pin APD is connected with one end of a resistor R164, a pin CLAMP is connected with one end of a resistor R174, a pin MOUT is connected with resistors R956 and R1124, a capacitor C124 is connected with R1124 IN parallel, a pin RLIM is connected with one end of a resistor R169, a pin ILIM is connected with one end of a resistor R169, the other end of a resistor R169, a capacitor C171 is connected with, the capacitor C124 is connected with the capacitor R1124 in parallel, so that noise waves in the circuit can be well filtered out, and reported values are accurate.)

1. A boost module of an optical power detection circuit is characterized in that: the boost circuit comprises a boost chip, wherein a pin IN of the boost chip is connected with one end of a capacitor C1027, pins LX1 and LX2 are connected with a common connection point between an inductor L12 and the anode of a diode D21, the cathode of the diode D21 is connected with one end of a resistor R949, the other end of the diode D21 is connected with one end of a resistor R948, a pin BIAS is connected with one end of a resistor R162, the other end of the resistor R162 is connected with a capacitor C1028, one end of a capacitor C136 is connected with the resistor R162, the other end of the capacitor C136 is connected with the ground, a pin APD is connected with one end of a resistor R164, a pin CLAMP is connected with one end of a resistor R174, a pin MOUT is respectively connected with resistors R956 and R1124, a capacitor C124 is connected with R1124 IN parallel, a pin RLIM is connected with one end of a resistor R169, a pin ILIM is connected with one end of a resistor R169, the other end of the resistor R169 is connected with.

2. The boost module of claim 1, wherein: the capacitance of the capacitor C124 is 100 PF.

3. The boost module of claim 1, wherein: the model of the boosting chip is I799N.

Technical Field

The invention relates to the technical field of optical power detection, in particular to a boosting module of an optical power detection circuit.

Background

In the existing optical power detection circuit, after receiving light from the OLT, a photodetector generates light-induced current, and the light reception is completed by a receiver, and the received light is amplified and converted into an electrical signal, which is transmitted to a control system for signal processing, so as to obtain required information.

At present, a boost module with a boost chip of I7990 is generally adopted in the market, and when downlink light is large light and exceeds-15 DB, the difference between the value reported by the ONU and the actually received light is large, and the deviation often exceeds 2DB, so that the bad rate reported by products is high.

Disclosure of Invention

Based on this, the invention provides a boosting module of an optical power detection circuit.

A boost module of an optical power detection circuit comprises a boost chip, wherein a pin IN of the boost chip is connected with one end of a capacitor C1027, pins LX1 and LX2 are connected with a common connection point between an inductor L12 and an anode of a diode D21, a cathode of the diode D21 is connected with one end of a resistor R949, the other end of the diode D21 is connected with one end of a resistor R948, a pin BIAS is connected with one end of a resistor R162, the other end of the resistor R162 is connected with a capacitor C1028, one end of a capacitor C136 is connected with a resistor R162, the other end of the capacitor C136 is connected with a ground pole, a pin APD is connected with one end of a resistor R164, a pin CLAMP is connected with one end of a resistor R174, and a, r1124, capacitors C124 and R1124 are connected in parallel, pin RLIM is connected to one end of resistor R169, pin ILIM is connected to one end of resistor R169, the other end is connected to resistor R175, capacitor C171 is connected to resistor R175 in parallel, pin CNTRL is connected to resistor R950, and pin SGND is connected to ground.

In one embodiment, the capacitance of the capacitor C124 is 100 PF.

In one embodiment, the type of the boost chip is I799N.

Above-mentioned optical power detection circuit's boost module is through being connected pin SGND and earth electrode to and electric capacity C124 and R1124 parallel connection, and pin SGND is connected with the earth electrode, can play fine anti-interference effect, and electric capacity C124 and R1124 parallel connection can be fine filter out the clutter in the circuit, effectively improve the accurate problem of big light report, make the report value accurate, the deviation is little, and the uniformity is good.

Drawings

Fig. 1 is a circuit diagram of a boosting module of an optical power detection circuit according to an embodiment of the invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown IN fig. 1, a boost module of an optical power detection circuit includes a boost chip, pin IN of the boost chip is connected to one end of a capacitor C1027, pins LX1 and LX2 are connected to a common connection point between an inductor L12 and an anode of a diode D21, a cathode of the diode D21 is connected to one end of a resistor R949, the other end is connected to one end of a resistor R948, pin BIAS is connected to one end of a resistor R162, the other end of the resistor R162 is connected to a capacitor C1028, one end of a capacitor C136 is connected to a resistor R162, the other end is connected to a ground, pin APD is connected to one end of a resistor R164, pin CLAMP is connected to one end of a resistor R174, pin momout is connected to resistors R956 and R1124 respectively, a capacitor C124 is connected to R1124 IN parallel, pin RLIM is connected to one end of a resistor R169, pin ILIM is connected to one end of a resistor R169, the other end is connected to a resistor R175, a capacitor C171 is connected to a resistor R175 IN parallel, and, pin SGND is connected to ground.

When the optical power is detected, the optical receiver receives light and converts the light into an electric signal to enter from an IN pin of a boost chip, the electric signal is output by a pin MOUT after being boosted IN the boost chip, the electric signal is subjected to voltage division by resistors R956 and R1124 respectively, the output current is provided for a control module and then is subjected to information processing, the optical power value is finally obtained, the capacitor C124 and the resistor R1124 are connected IN parallel, noise waves IN a circuit can be well filtered, and the pin SGND is connected with the ground pole, so that the anti-interference effect is good.

Above-mentioned optical power detection circuit's boost module is through being connected pin SGND and earth electrode to and electric capacity C124 and R1124 parallel connection, and pin SGND is connected with the earth electrode, can play fine anti-interference effect, and electric capacity C124 and R1124 parallel connection can be fine filter out the clutter in the circuit, effectively improve the accurate problem of big light report, make the report value accurate, the deviation is little, and the uniformity is good.

Further, in order to achieve better filtering effect, the capacitance of the capacitor C124 is 100 PF.

Thus, the capacitor with the capacity of 100PF is adopted, the filter capacitor C124 not only enables the direct current output of the power supply to be smooth and stable, but also can absorb the current fluctuation generated in the working process of the electronic circuit and the interference of the alternating current power supply in series, and the working performance of the circuit is more stable.

Further, the model of the boost chip is I799N.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.