CN217388655U - Photoelectric conversion noise reduction circuit and device of 5G looped network transceiver - Google Patents
Photoelectric conversion noise reduction circuit and device of 5G looped network transceiver Download PDFInfo
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- CN217388655U CN217388655U CN202221117056.1U CN202221117056U CN217388655U CN 217388655 U CN217388655 U CN 217388655U CN 202221117056 U CN202221117056 U CN 202221117056U CN 217388655 U CN217388655 U CN 217388655U
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Abstract
The utility model discloses a photoelectric conversion noise reduction circuit and a device of a 5G ring network transceiver, wherein the circuit comprises a switch module, a first photoelectric conversion module, a second photoelectric conversion module and a differential amplification module; the first photoelectric conversion module and the second photoelectric conversion module are connected with the switch module and the differential amplification module; the switch module conducts the first circuit loop and the second circuit loop when receiving the starting signal; when the first circuit loop is conducted, the first photoelectric conversion module converts the initial optical signal into an initial electric signal and amplifies the initial electric signal to obtain an initial amplified electric signal; when the second circuit loop is conducted, the second photoelectric conversion module converts the noise signal into an electric signal and amplifies the electric signal to obtain an amplified noise electric signal; and the differential amplification module performs differential amplification on the initial amplified electrical signal and the amplified noise electrical signal and outputs a noise-reduced amplified electrical signal. Noise can be filtered, and signal quality is improved.
Description
Technical Field
The utility model relates to a transceiver technical field especially relates to a photoelectric conversion of 5G looped netowrk transceiver falls circuit and device of making an uproar.
Background
When receiving an optical signal, the 5G ring network transceiver needs to convert the optical signal into an electrical signal and be matched with optical fiber transmission to realize remote communication, but the input signal of the transceiver is often weak, so that the transceiver is easily interfered by noise, and the signal quality is low.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a circuit and device of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver, aims at solving the input signal and receives noise interference to lead to the technical problem that signal quality is low.
In order to achieve the above object, the utility model provides a circuit of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver, the circuit includes: the photoelectric conversion device comprises a switch module, a first photoelectric conversion module, a second photoelectric conversion module and a differential amplification module; the switch module is connected with the first photoelectric conversion module and the second photoelectric conversion module, and the first photoelectric conversion module and the second photoelectric conversion module are also connected with the differential amplification module;
the switch module is used for conducting a first circuit loop where the first photoelectric conversion module is located and a second circuit loop where the second photoelectric conversion module is located when a starting signal is received;
the first photoelectric conversion module is used for converting an initial optical signal into an initial electrical signal and amplifying the initial electrical signal to obtain an initial amplified electrical signal when the first circuit loop is conducted;
the second photoelectric conversion module is used for converting the noise signal into an electrical signal and amplifying the electrical signal to obtain an amplified noise electrical signal when the second circuit loop is conducted;
and the differential amplification module is used for carrying out differential amplification on the initial amplified electric signal and the amplified noise electric signal and outputting a noise-reduced amplified electric signal.
Optionally, the switch module includes a first capacitor, a first resistor, a second resistor, and a MOS transistor;
the first end of the first resistor is an input end of a starting signal, the first end of the first capacitor is grounded, the second end of the first capacitor is connected with the first end of the first resistor, the second end of the first resistor is connected with the grid electrode of the MOS tube, the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is grounded, and the source electrode of the MOS tube is connected with a power supply.
Optionally, the first photoelectric conversion module includes a first photoelectric conversion unit, a first filtering unit, and a first amplifying unit; the first photoelectric conversion unit is connected with the first filtering unit, and the first filtering unit is connected with the first amplifying unit;
the first photoelectric conversion unit is used for converting an initial optical signal into a first initial electrical signal when the first circuit loop is conducted;
the first filtering unit is used for filtering noise current in the first initial electric signal to obtain a first filtered initial electric signal;
the first amplifying unit is configured to amplify the first filtered initial electrical signal to obtain an initial amplified electrical signal.
Optionally, the first photoelectric conversion unit includes a first photodiode and a third resistor; the first filtering unit comprises a second capacitor; the first amplifying unit comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a first operational amplifier;
the cathode of the first photodiode is connected to the drain of the MOS transistor, the anode of the first photodiode is connected to the first end of the third resistor, the second end of the third resistor is grounded, the first end of the second capacitor is grounded, the second end of the second capacitor is connected to the first end of the third resistor, the first end of the fourth resistor is connected to the second end of the second capacitor, the second end of the fourth resistor is connected to the inverting input terminal of the first operational amplifier, the first end of the seventh resistor is connected to the second end of the fourth resistor, the second end of the seventh resistor is connected to the output terminal of the first operational amplifier, the first end of the fifth resistor is connected to the power supply, the second end of the fifth resistor is connected to the non-inverting input terminal of the first operational amplifier, and the first end of the sixth resistor is connected to the second end of the fifth resistor, and the second end of the sixth resistor is grounded.
Optionally, the second photoelectric conversion module includes a second photoelectric conversion unit, a second filtering unit, and a second amplifying unit; the second photoelectric conversion unit is connected with the second filtering unit, and the second filtering unit is connected with the second amplifying unit;
the second photoelectric conversion unit is used for converting the noise signal into a first electric signal when the second circuit loop is conducted;
the second filtering unit is used for filtering noise current in the first electric signal to obtain a first filtered electric signal;
the second amplifying unit is used for amplifying the first filtered electric signal to obtain an amplified noise electric signal.
Optionally, the second photoelectric conversion unit includes a second photodiode and a tenth resistor; the second filtering unit comprises a third capacitor; the second amplifying unit comprises an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor and a second operational amplifier;
a cathode of the second photodiode is connected to a drain of the MOS transistor, an anode of the second photodiode is connected to a first end of the tenth resistor, a second end of the tenth resistor is grounded, a first end of the third capacitor is grounded, a second end of the third capacitor is connected to a first end of the tenth resistor, a first end of the eleventh resistor is connected to a second end of the third capacitor, a second end of the eleventh resistor is connected to an inverting input terminal of the second operational amplifier, a first end of the fourteenth resistor is connected to a second end of the eleventh resistor, a second end of the fourteenth resistor is connected to an output terminal of the second operational amplifier, a first end of the twelfth resistor is connected to the power supply, and a second end of the twelfth resistor is connected to a non-inverting input terminal of the second operational amplifier, and the first end of the thirteenth resistor is connected with the second end of the twelfth resistor, and the second end of the thirteenth resistor is grounded.
Optionally, the differential amplification module includes an eighth resistor, a ninth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a fourth capacitor, and a third operational amplifier;
a first end of the eighth resistor is connected to the output end of the first operational amplifier, a second end of the eighth resistor is connected to the inverting input end of the third operational amplifier, a first end of the ninth resistor is connected to the inverting input end of the third operational amplifier, a second end of the ninth resistor is connected to the output end of the third operational amplifier, a first end of the fifteenth resistor is connected to the output end of the second operational amplifier, a second end of the fifteenth resistor is connected to the non-inverting input end of the third operational amplifier, a first end of the sixteenth resistor is connected to the second end of the fifteenth resistor, a second end of the sixteenth resistor is grounded, a first end of the fourth capacitor is connected to the output end of the third operational amplifier, a second end of the fourth capacitor is grounded, and a first end of the seventeenth resistor is connected to the output end of the third operational amplifier, and the second end of the seventeenth resistor is an output end of the noise-reducing amplifying electric signal.
In order to achieve the above object, the utility model also provides a device of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver, the device of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver includes as above the circuit of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver.
The utility model provides a 5G looped netowrk transceiver's photoelectric conversion falls circuit of making an uproar, the circuit includes: the photoelectric conversion device comprises a switch module, a first photoelectric conversion module, a second photoelectric conversion module and a differential amplification module; the switch module is connected with the first photoelectric conversion module and the second photoelectric conversion module, and the first photoelectric conversion module and the second photoelectric conversion module are also connected with the differential amplification module; the switch module is used for conducting a first circuit loop where the first photoelectric conversion module is located and a second circuit loop where the second photoelectric conversion module is located when a starting signal is received; the first photoelectric conversion module is used for converting an initial optical signal into an initial electrical signal and amplifying the initial electrical signal to obtain an initial amplified electrical signal when the first circuit loop is conducted; the second photoelectric conversion module is used for converting the noise signal into an electrical signal and amplifying the electrical signal to obtain an amplified noise electrical signal when the second circuit loop is conducted; and the differential amplification module is used for carrying out differential amplification on the initial amplified electric signal and the amplified noise electric signal and outputting a noise-reduced amplified electric signal. The utility model discloses a switch switches on the circuit return circuit at first photoelectric conversion module and second photoelectric conversion module place, and first photoelectric conversion module obtains the initial amplified signal of telecommunication with initial light signal amplification, and second photoelectric conversion module converts noise signal into the amplified noise signal of telecommunication, and the difference amplification module carries out the difference with the initial amplified signal of telecommunication and the amplified noise signal of telecommunication and enlargies, and the amplified signal of telecommunication of making an uproar falls in the output to with the noise filtering, improved signal quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of a photoelectric conversion noise reduction circuit of the 5G ring network transceiver of the present invention;
fig. 2 is a schematic circuit structure diagram of an embodiment of the photoelectric conversion noise reduction circuit of the 5G ring network transceiver of the present invention;
fig. 3 is a functional block diagram of an embodiment of the noise reduction circuit for photoelectric conversion of the 5G ring network transceiver of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a circuit of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver.
Referring to fig. 1, in the embodiment of the present invention, the photoelectric conversion noise reduction circuit of the 5G ring network transceiver includes: a switch module 10, a first photoelectric conversion module 20, a second photoelectric conversion module 30, and a differential amplification module 40; the switch module 10 is connected to the first photoelectric conversion module 20 and the second photoelectric conversion module 30, and the first photoelectric conversion module 20 and the second photoelectric conversion module 30 are further connected to the differential amplification module 40;
the switch module 10 is configured to, when receiving a start signal, turn on a first circuit loop in which the first photoelectric conversion module 20 is located and a second circuit loop in which the second photoelectric conversion module 30 is located.
It is understood that the start signal may be a signal for starting the photoelectric conversion noise reduction circuit of the 5G ring network transceiver, and the start signal may be a high level signal; the first photoelectric conversion module and the second photoelectric conversion module are symmetrical.
The first photoelectric conversion module 20 is configured to convert an initial optical signal into an initial electrical signal when the first circuit loop is turned on, and amplify the initial electrical signal to obtain an initial amplified electrical signal.
It should be understood that the first photoelectric conversion module receives an initial optical signal, which includes an optical signal and a noise signal; the corresponding initial amplified electrical signal includes an amplified electrical signal corresponding to the optical signal and an amplified noise signal corresponding to the noise signal.
The second photoelectric conversion module 30 is configured to convert the noise signal into an electrical signal when the second circuit loop is turned on, and amplify the electrical signal to obtain an amplified noise electrical signal.
It is understood that the second photoelectric conversion module receives only the noise signal, converts the noise signal into an electrical signal and amplifies the electrical signal to obtain an amplified noise electrical signal.
The differential amplification module 40 is configured to differentially amplify the initial amplified electrical signal and the amplified noise electrical signal, and output a noise-reduced amplified electrical signal.
It can be understood that the initially amplified electrical signal includes an amplified electrical signal and an amplified noise signal, and the differential amplification module performs differential amplification on the initially amplified electrical signal and the amplified noise signal, so as to remove the amplified noise signal in the initially amplified electrical signal, and obtain a noise-reduced amplified electrical signal.
Further, referring to fig. 2, in order to improve the signal quality, the switch module 10 includes a first capacitor C1, a first resistor R1, a second resistor R2, and a MOS transistor Q; the first end of first resistance R1 is the input of start signal, the first end ground of first electric capacity C1, the second end of first electric capacity C1 with the first end of first resistance R1 is connected, the second end of first resistance R1 with MOS pipe Q's gate is connected, the first end of second resistance R2 with the second end of first resistance R1 is connected, the second end ground of second resistance R2, MOS pipe Q's source is connected with the power.
In this embodiment, the MOS transistor Q is a PMOS, C1 is a filter capacitor, R1 is a current limiting resistor, and R2 is a pull-up resistor; when the enable signal is a high level signal, R2 pulls the level of the Q gate high, so that Q is turned on.
Further, referring to fig. 3, in order to improve signal quality, the first photoelectric conversion module 20 includes a first photoelectric conversion unit 201, a first filtering unit 202, and a first amplifying unit 203; the first photoelectric conversion unit 201 is connected to the first filtering unit 202, and the first filtering unit 202 is connected to the first amplifying unit 203; the first photoelectric conversion unit 201 is configured to convert an initial optical signal into a first initial electrical signal when the first circuit loop is turned on; the first filtering unit 202 is configured to filter a noise current in the first initial electrical signal to obtain a first filtered initial electrical signal; the first amplifying unit 203 is configured to amplify the first filtered initial electrical signal to obtain an initial amplified electrical signal.
In this embodiment, the first photoelectric conversion unit 201 converts the original optical signal into a first original electrical signal, the first filtering unit 202 filters a noise current in the first original electrical signal to obtain a first filtered original electrical signal, and the first amplifying unit amplifies the first filtered original electrical signal to obtain an original amplified electrical signal.
Further, with continued reference to fig. 2, to improve signal quality, the first photoelectric conversion unit 201 includes a first photodiode LED1 and a third resistor R3; the first filtering unit 202 comprises a second capacitor C2; the first amplification unit 203 comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a first operational amplifier A1; a cathode of the first photodiode LED1 is connected to a drain of the MOS transistor Q, an anode of the first photodiode LED1 is connected to a first end of the third resistor R3, a second end of the third resistor R3 is grounded, a first end of the second capacitor C2 is grounded, a second end of the second capacitor C2 is connected to a first end of the third resistor R3, a first end of the fourth resistor R4 is connected to a second end of the second capacitor C2, a second end of the fourth resistor R4 is connected to an inverting input terminal of the first operational amplifier a1, a first end of the seventh resistor R7 is connected to a second end of the fourth resistor R4, a second end of the seventh resistor R7 is connected to an output terminal of the first operational amplifier a1, a first end of the fifth resistor R5 is connected to the power supply, and a second end of the fifth resistor R5 is connected to a non-inverting input terminal of the first operational amplifier a1, the first end of the sixth resistor R6 is connected with the second end of the fifth resistor R5, and the second end of the sixth resistor R6 is grounded.
In this embodiment, a change in the input initial optical signal may cause a change in the on-current of the LED1, which causes a change in the potential across the R3, thereby converting the initial optical signal into an initial electrical signal; the initial electric signal is filtered by C2 to obtain an initial filtered electric signal V2, V2 is transmitted to R4, and is input to the inverting input end of a1 through R4, and V2 is amplified by a1 to output an initial amplified electric signal VA (V2-VDD) × R7/R4.
Further, with continued reference to fig. 3, in order to improve the signal quality, the second photoelectric conversion module 30 includes a second photoelectric conversion unit 301, a second filtering unit 302, and a second amplifying unit 303; the second photoelectric conversion unit 301 is connected to the second filtering unit 302, and the second filtering unit 302 is connected to the second amplifying unit 303; the second photoelectric conversion unit 301 is configured to convert a noise signal into a first electrical signal when the second circuit loop is turned on; the second filtering unit 302 is configured to filter a noise current in the first electrical signal to obtain a first filtered electrical signal; the second amplifying unit 303 is configured to amplify the first filtered electrical signal to obtain an amplified noise electrical signal.
In this embodiment, the second photoelectric conversion unit 301 receives a noise signal and converts the noise signal into a first electrical signal, the second filtering unit 302 filters a noise current in the first electrical signal to obtain a first filtered electrical signal V1, and the second amplifying unit 303 amplifies V1 to obtain an amplified noise signal VB.
Further, with continued reference to fig. 2, in order to improve the signal quality, the second photoelectric conversion unit 301 includes a second photodiode LED2 and a tenth resistor R10; the second filtering unit 302 includes a third capacitor C3; the second amplification unit 303 includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, and a second operational amplifier a 2; a cathode of the second photodiode LED2 is connected to a drain of the MOS transistor Q, an anode of the second photodiode LED2 is connected to a first end of the tenth resistor R10, a second end of the tenth resistor R10 is grounded, a first end of the third capacitor R3 is grounded, a second end of the third capacitor R3 is connected to a first end of the tenth resistor R10, a first end of the eleventh resistor R11 is connected to a second end of the third capacitor C3, a second end of the eleventh resistor R11 is connected to an inverting input terminal of the second operational amplifier a2, a first end of the fourteenth resistor R14 is connected to a second end of the eleventh resistor R11, a second end of the fourteenth resistor R14 is connected to an output terminal of the second operational amplifier a2, a first end of the twelfth resistor R12 is connected to the power supply, and a second end of the twelfth resistor R12 is connected to a non-inverting input terminal of the second operational amplifier a2, a first end of the thirteenth resistor R13 is connected to a second end of the twelfth resistor R12, and a second end of the thirteenth resistor R13 is grounded.
In this embodiment, the change of the input noise signal may cause the change of the on-current of the LED2, which causes the change of the potential at two ends of the R10, thereby converting the noise signal into a first electrical signal; the first electric signal is filtered by C3 to obtain V1, which is transmitted to R11, and then input to the inverting input terminal of a2 via R11, and V1 is amplified by a2 and then output as an amplified noise signal VB (V1-VDD) × R14/R11.
Further, with continued reference to fig. 2, in order to improve the signal quality, the differential amplification module 40 includes an eighth resistor R8, a ninth resistor R9, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a fourth capacitor C4, and a third operational amplifier a 3; a first end of the eighth resistor R8 is connected to an output end of the first operational amplifier a1, a second end of the eighth resistor R8 is connected to an inverting input end of the third operational amplifier A3, a first end of the ninth resistor R9 is connected to an inverting input end of the third operational amplifier A3, a second end of the ninth resistor R9 is connected to an output end of the third operational amplifier A3, a first end of the fifteenth resistor R15 is connected to an output end of the second operational amplifier a2, a second end of the fifteenth resistor R15 is connected to a non-inverting input end of the third operational amplifier A3, a first end of the sixteenth resistor R16 is connected to a second end of the fifteenth resistor R15, a second end of the sixteenth resistor R16 is grounded, a first end of the fourth capacitor C4 is connected to an output end of the third operational amplifier A3, and a second end of the fourth capacitor C4 is grounded, a first end of the seventeenth resistor R17 is connected to the output end of the third operational amplifier A3, and a second end of the seventeenth resistor R17 is an output end of the noise reduction amplifying electrical signal.
In this embodiment, VA is input to the inverting input terminal of the third operational amplifier via R8, VB is input to the non-inverting input terminal of the third operational amplifier A3 via R15, the third operational amplifier A3 performs differential amplification on VA and VB, and outputs a noise reduction amplified electrical signal after being filtered by an RC filter composed of R17 and C4, and the electrical signal Vout at the output terminal of A3 is (VA-VB) × R9/R8, thereby filtering out the amplified noise electrical signal corresponding to the noise signal.
This embodiment proposes a photoelectric conversion noise reduction circuit of 5G looped netowrk transceiver, the circuit includes: the photoelectric conversion device comprises a switch module, a first photoelectric conversion module, a second photoelectric conversion module and a differential amplification module; the switch module is connected with the first photoelectric conversion module and the second photoelectric conversion module, and the first photoelectric conversion module and the second photoelectric conversion module are also connected with the differential amplification module; the switch module is used for conducting a first circuit loop where the first photoelectric conversion module is located and a second circuit loop where the second photoelectric conversion module is located when a starting signal is received; the first photoelectric conversion module is used for converting an initial optical signal into an initial electrical signal and amplifying the initial electrical signal to obtain an initial amplified electrical signal when the first circuit loop is conducted; the second photoelectric conversion module is used for converting a noise signal into an electric signal and amplifying the electric signal to obtain an amplified noise electric signal when the second circuit loop is conducted; and the differential amplification module is used for carrying out differential amplification on the initial amplified electric signal and the amplified noise electric signal and outputting a noise-reduced amplified electric signal. This embodiment switches on the circuit loop that first photoelectric conversion module and second photoelectric conversion module were located through the switch, and first photoelectric conversion module obtains the initial amplified signal of telecommunication with the amplification of initial light signal, and second photoelectric conversion module converts noise signal into the amplified noise signal of telecommunication, and the difference amplification module carries out the difference with the initial amplified signal of telecommunication and the amplified noise signal of telecommunication and enlargies, and the amplified signal of telecommunication of making an uproar falls in the output to with noise filtering, improved signal quality.
In order to achieve the above object, the utility model also provides a device of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver, the device of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver includes as above the circuit of making an uproar falls in photoelectric conversion of 5G looped netowrk transceiver. The specific structure of the circuit refers to the above embodiments, and since the present device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A photoelectric conversion noise reduction circuit of a 5G ring network transceiver is characterized by comprising: the photoelectric conversion device comprises a switch module, a first photoelectric conversion module, a second photoelectric conversion module and a differential amplification module; the switch module is connected with the first photoelectric conversion module and the second photoelectric conversion module, and the first photoelectric conversion module and the second photoelectric conversion module are also connected with the differential amplification module;
the switch module is used for conducting a first circuit loop where the first photoelectric conversion module is located and a second circuit loop where the second photoelectric conversion module is located when a starting signal is received;
the first photoelectric conversion module is used for converting an initial optical signal into an initial electric signal when the first circuit loop is conducted, and amplifying the initial electric signal to obtain an initial amplified electric signal;
the second photoelectric conversion module is used for converting the noise signal into an electrical signal and amplifying the electrical signal to obtain an amplified noise electrical signal when the second circuit loop is conducted;
and the differential amplification module is used for carrying out differential amplification on the initial amplified electric signal and the amplified noise electric signal and outputting a noise-reduced amplified electric signal.
2. The circuit of claim 1, wherein the switch module comprises a first capacitor, a first resistor, a second resistor and a MOS transistor;
the first end of the first resistor is an input end of a starting signal, the first end of the first capacitor is grounded, the second end of the first capacitor is connected with the first end of the first resistor, the second end of the first resistor is connected with the grid electrode of the MOS tube, the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is grounded, and the source electrode of the MOS tube is connected with a power supply.
3. The circuit of claim 2, wherein the first photoelectric conversion module includes a first photoelectric conversion unit, a first filtering unit, and a first amplifying unit; the first photoelectric conversion unit is connected with the first filtering unit, and the first filtering unit is connected with the first amplifying unit;
the first photoelectric conversion unit is used for converting an initial optical signal into a first initial electrical signal when the first circuit loop is conducted;
the first filtering unit is used for filtering noise current in the first initial electric signal to obtain a first filtered initial electric signal;
the first amplifying unit is configured to amplify the first filtered initial electrical signal to obtain an initial amplified electrical signal.
4. The circuit according to claim 3, wherein the first photoelectric conversion unit includes a first photodiode and a third resistor; the first filtering unit comprises a second capacitor; the first amplifying unit comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a first operational amplifier;
the cathode of the first photodiode is connected to the drain of the MOS transistor, the anode of the first photodiode is connected to the first end of the third resistor, the second end of the third resistor is grounded, the first end of the second capacitor is grounded, the second end of the second capacitor is connected to the first end of the third resistor, the first end of the fourth resistor is connected to the second end of the second capacitor, the second end of the fourth resistor is connected to the inverting input terminal of the first operational amplifier, the first end of the seventh resistor is connected to the second end of the fourth resistor, the second end of the seventh resistor is connected to the output terminal of the first operational amplifier, the first end of the fifth resistor is connected to the power supply, the second end of the fifth resistor is connected to the non-inverting input terminal of the first operational amplifier, and the first end of the sixth resistor is connected to the second end of the fifth resistor, and the second end of the sixth resistor is grounded.
5. The circuit according to claim 4, wherein the second photoelectric conversion module includes a second photoelectric conversion unit, a second filtering unit, and a second amplifying unit; the second photoelectric conversion unit is connected with the second filtering unit, and the second filtering unit is connected with the second amplifying unit;
the second photoelectric conversion unit is used for converting the noise signal into a first electric signal when the second circuit loop is conducted;
the second filtering unit is used for filtering noise current in the first electric signal to obtain a first filtered electric signal;
the second amplifying unit is used for amplifying the first filtered electric signal to obtain an amplified noise electric signal.
6. The circuit according to claim 5, wherein the second photoelectric conversion unit includes a second photodiode and a tenth resistor; the second filtering unit comprises a third capacitor; the second amplifying unit comprises an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor and a second operational amplifier;
a cathode of the second photodiode is connected to a drain of the MOS transistor, an anode of the second photodiode is connected to a first end of the tenth resistor, a second end of the tenth resistor is grounded, a first end of the third capacitor is grounded, a second end of the third capacitor is connected to a first end of the tenth resistor, a first end of the eleventh resistor is connected to a second end of the third capacitor, a second end of the eleventh resistor is connected to an inverting input terminal of the second operational amplifier, a first end of the fourteenth resistor is connected to a second end of the eleventh resistor, a second end of the fourteenth resistor is connected to an output terminal of the second operational amplifier, a first end of the twelfth resistor is connected to the power supply, and a second end of the twelfth resistor is connected to a non-inverting input terminal of the second operational amplifier, and the first end of the thirteenth resistor is connected with the second end of the twelfth resistor, and the second end of the thirteenth resistor is grounded.
7. The circuit of claim 6, wherein the differential amplification module comprises an eighth resistor, a ninth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a fourth capacitor, and a third operational amplifier;
a first end of the eighth resistor is connected to the output end of the first operational amplifier, a second end of the eighth resistor is connected to the inverting input end of the third operational amplifier, a first end of the ninth resistor is connected to the inverting input end of the third operational amplifier, a second end of the ninth resistor is connected to the output end of the third operational amplifier, a first end of the fifteenth resistor is connected to the output end of the second operational amplifier, a second end of the fifteenth resistor is connected to the non-inverting input end of the third operational amplifier, a first end of the sixteenth resistor is connected to the second end of the fifteenth resistor, a second end of the sixteenth resistor is grounded, a first end of the fourth capacitor is connected to the output end of the third operational amplifier, a second end of the fourth capacitor is grounded, and a first end of the seventeenth resistor is connected to the output end of the third operational amplifier, and the second end of the seventeenth resistor is an output end of the noise-reducing amplifying electric signal.
8. An optoelectronic conversion noise reduction device of a 5G ring network transceiver, wherein the device comprises the optoelectronic conversion noise reduction circuit of the 5G ring network transceiver as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221117056.1U CN217388655U (en) | 2022-05-10 | 2022-05-10 | Photoelectric conversion noise reduction circuit and device of 5G looped network transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221117056.1U CN217388655U (en) | 2022-05-10 | 2022-05-10 | Photoelectric conversion noise reduction circuit and device of 5G looped network transceiver |
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| CN217388655U true CN217388655U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221117056.1U Active CN217388655U (en) | 2022-05-10 | 2022-05-10 | Photoelectric conversion noise reduction circuit and device of 5G looped network transceiver |
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| CN (1) | CN217388655U (en) |
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