CN211127735U - Automatic level control receiving circuit - Google Patents
Automatic level control receiving circuit Download PDFInfo
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- CN211127735U CN211127735U CN201922424483.9U CN201922424483U CN211127735U CN 211127735 U CN211127735 U CN 211127735U CN 201922424483 U CN201922424483 U CN 201922424483U CN 211127735 U CN211127735 U CN 211127735U
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Abstract
The utility model discloses an automatic level control receiving circuit, including infrared receiving circuit, first coupling circuit, voltage amplification circuit, automatic level control circuit, second coupling circuit, power amplification circuit, third coupling circuit, filter circuit, speaker and power, infrared receiving circuit with first coupling circuit electricity is connected, first coupling circuit with voltage amplification circuit electricity is connected, automatic level control circuit with first coupling circuit's signal input part and voltage amplification circuit's signal output part electricity is connected; the second coupling circuit is electrically connected with the signal output end of the voltage amplifying circuit and the signal input end of the power amplifying circuit; the third coupling circuit is electrically connected with the signal output end of the power amplification circuit and the loudspeaker, and the filter circuit is electrically connected with the power supply. The utility model has the advantages of convenient use and stable signal.
Description
Technical Field
The utility model relates to a computer technology field, in particular to automatic level control receiving circuit.
Background
The infrared receiving circuit generally detects infrared waves by using a photoelectric detector, and utilizes the principle of photoelectric effect, so that once the infrared receiving circuit is irradiated by light, the temperature rises, and the conductivity of the infrared receiving circuit changes. When the device is not irradiated by light, the dark current of the device is very weak and can be almost ignored. Therefore, the photoelectric detector can convert a weak optical signal into a current signal for amplification and sampling of a signal processing circuit at the later stage. Thus, the infrared receiving circuit is widely used. However, it is not seen that the infrared receiving circuit is applied to the notebook computer for the convenience of the user
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide one kind with infrared receiving circuit use notebook computer to the automatic level control receiving circuit that convenience of customers used.
The utility model provides an automatic level control receiving circuit, including infrared receiving circuit, first coupling circuit, voltage amplification circuit, automatic level control circuit, second coupling circuit, power amplification circuit, third coupling circuit, filter circuit, speaker and power, infrared receiving circuit with first coupling circuit electricity is connected, first coupling circuit with voltage amplification circuit electricity is connected, automatic level control circuit with first coupling circuit's signal input part and voltage amplification circuit's signal output part electricity is connected; the second coupling circuit is electrically connected with the signal output end of the voltage amplifying circuit and the signal input end of the power amplifying circuit; the third coupling circuit is electrically connected with the signal output end of the power amplification circuit and the loudspeaker, and the filter circuit is electrically connected with the power supply.
Preferably, the infrared receiving circuit includes a first infrared photoelectric tube, a second infrared photoelectric tube, a third infrared photoelectric tube, a fourth infrared photoelectric tube, and a first resistor, a first end of the first infrared photoelectric tube is electrically connected to a first end of the second infrared photoelectric tube, and a second end of the first infrared photoelectric tube is electrically connected to a second end of the second infrared photoelectric tube; the first end of the second infrared photoelectric tube is electrically connected with the first end of the third infrared photoelectric tube, and the second end of the second infrared photoelectric tube is electrically connected with the second end of the third infrared photoelectric tube; the first end of the third infrared photoelectric tube is electrically connected with the first end of the fourth infrared photoelectric tube, and the second end of the third infrared photoelectric tube is electrically connected with the second end of the fourth infrared photoelectric tube; a first end of the fourth infrared photoelectric tube is electrically connected with the power supply, and a second end of the fourth infrared photoelectric tube is electrically connected with a first end of the first resistor; and the second end of the first resistor is electrically connected with the voltage amplifying circuit and the automatic level control circuit.
Preferably, the first coupling circuit includes a first capacitor, a first end of the first capacitor is electrically connected to a first end of the first resistor, and a second end of the first capacitor is electrically connected to the voltage amplifying circuit.
Preferably, the voltage amplifying circuit includes a second resistor, a third resistor, and a first triode, a first end of the second resistor is electrically connected to the power supply, and a second end of the second resistor is electrically connected to a first end of the third resistor; a second end of the third resistor is electrically connected with a second end of the first capacitor; the collector of the first triode is electrically connected with the second end of the second resistor, the base of the first triode is electrically connected with the second end of the third resistor, and the emitter of the first triode is electrically connected with the second end of the first resistor.
Preferably, the automatic level control circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a second capacitor, a third capacitor, and a second triode, wherein a first end of the fourth resistor is electrically connected to a first end of the first capacitor, and a second end of the fourth resistor is electrically connected to a first end of the second capacitor and a first end of the fifth resistor; the second end of the fifth resistor is electrically connected with the base electrode of the second triode; the second end of the second capacitor is grounded; the first end of the third capacitor is electrically connected with the second end of the second resistor, and the second end of the third capacitor is electrically connected with the first end of the sixth resistor; and the second end of the sixth resistor is electrically connected with the collector of the second triode, and the emitter of the second triode is grounded.
Preferably, the second coupling circuit includes a fourth capacitor, a first end of the fourth capacitor is electrically connected to a first end of the third capacitor, and a second end of the fourth capacitor is electrically connected to the power amplification circuit.
Preferably, the power amplifying circuit includes an operational amplifier, a second pin of the operational amplifier is grounded, a third pin of the operational amplifier is electrically connected to the second end of the fourth capacitor, a fifth pin of the operational amplifier is electrically connected to the third coupling circuit, and a sixth pin of the operational amplifier is electrically connected to the power supply.
Preferably, the third coupling circuit includes a fifth capacitor, a first end of the fifth capacitor is electrically connected to the power amplification circuit, and a second end of the fifth capacitor is electrically connected to the speaker.
Preferably, the filter circuit includes a sixth capacitor, a first end of the sixth capacitor is electrically connected to the power supply through a key switch, and a second end of the sixth capacitor is grounded.
The utility model discloses following beneficial effect has: the utility model discloses a cooperation between infrared receiving circuit, first coupling circuit, voltage amplification circuit, automatic level control circuit, second coupling circuit, power amplification circuit, third coupling circuit, filter circuit, speaker and the power, when it is used on notebook computer, can receive outside audio signal, richened notebook computer's signal reception mode, the user of being convenient for listens to audio signal such as music. In addition, the automatic level control circuit is arranged, so that a signal can be kept stable as much as possible even if the distance is changed when a user uses the automatic level control circuit.
Drawings
Fig. 1 is a schematic structural diagram of the automatic level control receiving circuit of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.
Referring to fig. 1, the present invention provides an automatic level control receiving circuit, which includes an infrared receiving circuit 1, a first coupling circuit 2, a voltage amplifying circuit 3, an automatic level control circuit 4, a second coupling circuit 5, a power amplifying circuit 6, a third coupling circuit 7, a filter circuit 8, a speaker P and a power Vcc, wherein the infrared receiving circuit 1 is electrically connected to the first coupling circuit 2 for receiving an infrared audio signal. The first coupling circuit 2 is electrically connected to the voltage amplifying circuit 3, and is configured to couple the audio signal to the voltage amplifying circuit 3. The automatic level control circuit 4 is electrically connected with the signal input end of the first coupling circuit 2 and the signal output end of the voltage amplifying circuit 3. The second coupling circuit 5 is electrically connected to the signal output terminal of the voltage amplifying circuit 3 and the signal input terminal of the power amplifying circuit 6. The third coupling circuit 7 is electrically connected to the signal output terminal of the power amplifier circuit 6 and the speaker P, and the filter circuit 8 is electrically connected to the power supply Vcc.
The infrared receiving circuit 1 comprises a first infrared photoelectric tube D1, a second infrared photoelectric tube D2, a third infrared photoelectric tube D3, a fourth infrared photoelectric tube D4 and a first resistor R1, wherein a first end of the first infrared photoelectric tube D1 is electrically connected with a first end of the second infrared photoelectric tube D2, and a second end of the first infrared photoelectric tube D1 is electrically connected with a second end of the second infrared photoelectric tube D2. A first end of the second infrared photoelectric cell D2 is electrically connected to a first end of the third infrared photoelectric cell D3, and a second end of the second infrared photoelectric cell D2 is electrically connected to a second end of the third infrared photoelectric cell D3.
A first end of the third infrared photoelectric tube D3 is electrically connected to a first end of the fourth infrared photoelectric tube D4, and a second end of the third infrared photoelectric tube D3 is electrically connected to a second end of the fourth infrared photoelectric tube D4. A first terminal of the fourth ir photo-tube D4 is electrically connected to the power source Vcc, and a second terminal of the fourth ir photo-tube D4 is electrically connected to the first terminal of the first resistor R1. A second end of the first resistor R1 is electrically connected to the voltage amplifying circuit 3 and the automatic level control circuit 4.
The first coupling circuit 2 includes a first capacitor C1, a first end of the first capacitor C1 is electrically connected to a first end of the first resistor R1, and a second end of the first capacitor C1 is electrically connected to the voltage amplifying circuit 3. By arranging the first coupling circuit 2, interference signals are better filtered, so that the interference signals are prevented from causing interference on a subsequent circuit.
The voltage amplifying circuit 3 comprises a second resistor R2, a third resistor R3 and a first triode Q1, wherein a first end of the second resistor R2 is electrically connected with a power supply Vcc, and a second end of the second resistor R2 is electrically connected with a first end of the third resistor R3. The second end of the third resistor R3 is electrically connected to the second end of the first capacitor C1. The collector of the first triode Q1 is electrically connected to the second end of the second resistor R2, the base of the first triode Q1 is electrically connected to the second end of the third resistor R3, and the emitter of the first triode Q1 is electrically connected to the second end of the first resistor R1.
The automatic level control circuit 4 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second capacitor C2, a third capacitor C3, and a second transistor Q2, wherein a first end of the fourth resistor R4 is electrically connected to a first end of the first capacitor C1, and a second end of the fourth resistor R4 is electrically connected to a first end of the second capacitor C2 and a first end of the fifth resistor R5. The second end of the fifth resistor R5 is electrically connected with the base of the second triode Q2. The second end of the second capacitor C2 is grounded.
The first end of the third capacitor C3 is electrically connected to the second end of the second resistor R2, and the second end of the third capacitor C3 is electrically connected to the first end of the sixth resistor R6. The second end of the sixth resistor R6 is electrically connected to the collector of the second transistor Q2, and the emitter of the second transistor Q2 is grounded. It is understood that the second transistor Q2 is a variable resistor, the equivalent resistance between the collector and the emitter depends on the control voltage of the base, the second transistor Q2 performs shunt attenuation, and the fourth resistor R4, the fifth resistor R5 and the second capacitor C2 form a control voltage forming circuit to convert the audio signal voltage on the first resistor into the control voltage of the second transistor Q2.
When the infrared audio signal of transmission with the utility model discloses the distance is near the time, received signal is just strong, and the control voltage of formation is just high, and second triode Q2 conduction degree is big, and equivalent resistance is little, and second triode Q2 collecting electrode output signal bypass sieve subtracts just much. When the infrared audio signal of transmission with the utility model discloses when far away, received signal is just weak, and the control voltage of formation is just low, and second triode Q2 conduction degree is little, and equivalent resistance is high, and second triode Q2 collecting electrode output signal bypass sieve reduces just less to realize automatically regulated, the output level remains stable.
The second coupling circuit 5 includes a fourth capacitor C4, a first terminal of the fourth capacitor C4 is electrically connected to a first terminal of the third capacitor C3, and a second terminal of the fourth capacitor C4 is electrically connected to the power amplifying circuit 6. The power amplifier comprises an operational amplifier U, a second pin of the operational amplifier is grounded, a third pin of the operational amplifier is electrically connected with a second end of the fourth capacitor C4, a fifth pin of the operational amplifier is electrically connected with the third coupling circuit 7, and a sixth pin of the operational amplifier is electrically connected with the power supply Vcc.
The third coupling circuit 7 includes a fifth capacitor C5, a first terminal of the fifth capacitor C5 is electrically connected to the power amplifying circuit 6, and a second terminal of the fifth capacitor C5 is electrically connected to the speaker P. The filter circuit 8 comprises a sixth capacitor, a first end of the sixth capacitor is electrically connected with the power supply Vcc through a key switch, and a second end of the sixth capacitor is grounded.
To sum up, the utility model discloses an cooperation between infrared receiving circuit 1, first coupling circuit 2, voltage amplification circuit 3, automatic level control circuit 4, second coupling circuit 5, power amplification circuit 6, third coupling circuit 7, filter circuit 8, speaker P and the power Vcc when using on notebook computer, can receive outside audio signal, has richened notebook computer's signal reception mode, and the user of being convenient for listens to audio signal such as music. In addition, the automatic level control circuit is arranged, so that a signal can be kept stable as much as possible even if the distance is changed when a user uses the automatic level control circuit.
It is right above the utility model provides an automatic level control receiving circuit has carried out the detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping understanding the utility model discloses a method and core thought thereof. Meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. To sum up, this description content only does the embodiment of the utility model, not therefore the restriction the patent scope of the utility model, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing was done, or directly or indirectly use in other relevant technical field, all the same reason is included in the patent protection scope of the utility model, should not be understood as right the utility model discloses a restriction.
Claims (9)
1. An automatic level control receiving circuit is characterized by comprising an infrared receiving circuit, a first coupling circuit, a voltage amplifying circuit, an automatic level control circuit, a second coupling circuit, a power amplifying circuit, a third coupling circuit, a filter circuit, a loudspeaker and a power supply, wherein the infrared receiving circuit is electrically connected with the first coupling circuit, the first coupling circuit is electrically connected with the voltage amplifying circuit, and the automatic level control circuit is electrically connected with a signal input end of the first coupling circuit and a signal output end of the voltage amplifying circuit; the second coupling circuit is electrically connected with the signal output end of the voltage amplifying circuit and the signal input end of the power amplifying circuit; the third coupling circuit is electrically connected with the signal output end of the power amplification circuit and the loudspeaker, and the filter circuit is electrically connected with the power supply.
2. The automatic level control receiving circuit of claim 1, wherein the infrared receiving circuit comprises a first infrared photoelectric cell, a second infrared photoelectric cell, a third infrared photoelectric cell, a fourth infrared photoelectric cell, a first resistor, a first end of the first infrared photoelectric cell is electrically connected with a first end of the second infrared photoelectric cell, and a second end of the first infrared photoelectric cell is electrically connected with a second end of the second infrared photoelectric cell; the first end of the second infrared photoelectric tube is electrically connected with the first end of the third infrared photoelectric tube, and the second end of the second infrared photoelectric tube is electrically connected with the second end of the third infrared photoelectric tube; the first end of the third infrared photoelectric tube is electrically connected with the first end of the fourth infrared photoelectric tube, and the second end of the third infrared photoelectric tube is electrically connected with the second end of the fourth infrared photoelectric tube; a first end of the fourth infrared photoelectric tube is electrically connected with the power supply, and a second end of the fourth infrared photoelectric tube is electrically connected with a first end of the first resistor; and the second end of the first resistor is electrically connected with the voltage amplifying circuit and the automatic level control circuit.
3. The automatic level control receiving circuit of claim 2 wherein said first coupling circuit comprises a first capacitor, a first terminal of said first capacitor being electrically connected to a first terminal of said first resistor, a second terminal of said first capacitor being electrically connected to said voltage amplification circuit.
4. The automatic level control receiving circuit of claim 3, wherein the voltage amplifying circuit comprises a second resistor, a third resistor, and a first transistor, wherein a first terminal of the second resistor is electrically connected to a power source, and a second terminal of the second resistor is electrically connected to a first terminal of the third resistor; a second end of the third resistor is electrically connected with a second end of the first capacitor; the collector of the first triode is electrically connected with the second end of the second resistor, the base of the first triode is electrically connected with the second end of the third resistor, and the emitter of the first triode is electrically connected with the second end of the first resistor.
5. The automatic level control receiving circuit of claim 4, wherein the automatic level control circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a second capacitor, a third capacitor, and a second transistor, wherein a first terminal of the fourth resistor is electrically connected to a first terminal of the first capacitor, and a second terminal of the fourth resistor is electrically connected to a first terminal of the second capacitor and a first terminal of the fifth resistor; the second end of the fifth resistor is electrically connected with the base electrode of the second triode; the second end of the second capacitor is grounded; the first end of the third capacitor is electrically connected with the second end of the second resistor, and the second end of the third capacitor is electrically connected with the first end of the sixth resistor; and the second end of the sixth resistor is electrically connected with the collector of the second triode, and the emitter of the second triode is grounded.
6. The automatic level control receiving circuit of claim 5 wherein said second coupling circuit comprises a fourth capacitor, a first terminal of said fourth capacitor being electrically connected to a first terminal of said third capacitor, a second terminal of said fourth capacitor being electrically connected to said power amplification circuit.
7. The automatic level control receiving circuit of claim 6 wherein said power amplifying circuit comprises an operational amplifier, a second pin of said operational amplifier is connected to ground, a third pin of said operational amplifier is electrically connected to a second terminal of said fourth capacitor, a fifth pin of said operational amplifier is electrically connected to said third coupling circuit, and a sixth pin of said operational amplifier is electrically connected to said power supply.
8. The automatic level control receiving circuit of claim 7 wherein said third coupling circuit comprises a fifth capacitor, a first terminal of said fifth capacitor being electrically connected to said power amplification circuit and a second terminal of said fifth capacitor being electrically connected to said speaker.
9. The automatic level control receiving circuit of claim 8 wherein said filter circuit comprises a sixth capacitor, a first terminal of said sixth capacitor being electrically connected to said power supply through a keyswitch, a second terminal of said sixth capacitor being connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424483.9U CN211127735U (en) | 2019-12-30 | 2019-12-30 | Automatic level control receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424483.9U CN211127735U (en) | 2019-12-30 | 2019-12-30 | Automatic level control receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211127735U true CN211127735U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922424483.9U Active CN211127735U (en) | 2019-12-30 | 2019-12-30 | Automatic level control receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211127735U (en) |
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2019
- 2019-12-30 CN CN201922424483.9U patent/CN211127735U/en active Active
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