CN2834028Y - Audio signal repeater - Google Patents
Audio signal repeater Download PDFInfo
- Publication number
- CN2834028Y CN2834028Y CN 200520088126 CN200520088126U CN2834028Y CN 2834028 Y CN2834028 Y CN 2834028Y CN 200520088126 CN200520088126 CN 200520088126 CN 200520088126 U CN200520088126 U CN 200520088126U CN 2834028 Y CN2834028 Y CN 2834028Y
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- power supply
- utility
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- resistor
- transistor
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Abstract
The utility model provides an audio signal repeater which belongs to devices capable of repeating audio signals. The utility model is provided with a transistor. A base electrode of the transistor is connected with one end of a resistor and the other resistor through capacitors, the other end of the resistor is connected to a joint and the other end of the other resistor is connected with the negative electrode of a power supply. A third resistor and another capacitor are connected between the base electrode of the transistor and the positive electrode of the power supply. One end of each of inductance coils connected in parallel and one end of a third capacitor are connected with a collector electrode of the transistor and antennae, and the other ends are connected with the positive electrode of the power supply. An emitter electrode of the transistor is connected with the negative electrode of the power supply by a fourth resistor, and the negative electrode of the power supply is also connected with the other joint. The repeater can transmit the audio signals of a domestic appliance generating sound, and thus, the audio signals can be received by wireless earphones. The utility model has the advantages of simple circuit, small size and convenient operation. The utility model can be used by one people, besides, many people can simultaneously receive signals by wearing earphones through the utility model. Meanwhile, the utility model can be also used for speech classrooms in schools.
Description
Technical field
The utility model provides a kind of device that is used to relay audio signal.
Background technology
At present, when television set, broadcast receiver, recorder, combination audio, VCD, DVD etc. send the household electrical appliance use of audible sound, often directly sound by its loud speaker that carries.Like this, will influence other people.When using television set, will inevitably influence the child who is learning as the head of a family.For this reason, some head of a family takes not see, do not listen, or volume is transferred to minimum way.But after volume is turned down, can influence watch, audibility.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of audio signal repeater is provided, and sends out with the audio signal of the household electrical appliance that will send sound equipment, receives for wireless headset, thereby do not influence other people.
The utility model is to realize like this, the audio signal repeater, it has triode, the base stage of triode is through electric capacity and resistance, one end of another resistance links to each other, the other end of resistance is connected on the joint, another termination power cathode of another resistance, be connected with the 3rd resistance and another electric capacity between transistor base and the positive source, the inductance coil that is connected in parallel, one end of the 3rd electric capacity links to each other with the collector electrode of triode and is connected with antenna, the positive pole of another termination power, between the collector electrode and emitter of triode, be connected with the 4th electric capacity and the 5th electric capacity between emitter and the positive source respectively, the emitter of triode also connects the negative pole of power supply through the 4th resistance, also be connected to another joint on the negative pole of power supply.
This audio signal repeater can send out the audio signal of sending the household electrical appliance of sound equipment, receives for wireless headset, and circuit is simple, and volume is little, and is easy to use, can use for a people, also can be for many people wearing headphones reception simultaneously.Also can use for the speech room of school.
Description of drawings
Fig. 1 is a circuit theory schematic diagram of the present utility model.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model and operation principle.
As shown in drawings, the audio signal repeater, it has triode BG1, the base stage of triode is through capacitor C 1 and resistance R 1, one end of another resistance R 2 links to each other, the other end of resistance R 1 is connected on the joint 11, another termination power E negative pole of another resistance R 2, be connected with the 3rd resistance R 3 and another capacitor C 2 between transistor base and the power supply E positive pole, the inductance coil L that is connected in parallel, one end of the 3rd capacitor C 3 links to each other with the collector electrode of triode and is connected with antenna ANT, the positive pole of another termination power E, between the collector electrode and emitter of triode, be connected with the 4th capacitor C 4 and the 5th capacitor C 5 between emitter and the power supply E positive pole respectively, the emitter of triode also connects the negative pole of power supply E through the 4th resistance R 4, also be connected to another joint J2 on the negative pole of power supply E.
Joint J1, another joint J2 are connected on respectively on two terminals of audio signal plug, during use, in the audio signal output socket on the household electrical appliance such as this plug insertion television set.
The audible communication signal of drawing from the audio signal plug is delivered to the base stage of triode BG1 through capacitor C 1 after resistance R 1, R2 dividing potential drop, amplify through triode, obtains a signal that has been exaggerated on collector electrode.This signal produces high-frequency signal through the oscillating circuit of inductance coil L on the collector electrode and capacitor C 4 compositions, sends through antenna at last.Capacitor C 2 plays the effect of feedback oscillation signal.C4, C5 play the effect of trap signal.Resistance R 3 is the biasing resistor of triode.Resistance R 4 is used for the direct current negative feedback.
During reception, can utilize commercially available wireless headset to receive this signal.Can be by adjusting the parameter of oscillating circuit, make the frequency of the signal that this device sends identical with the receive frequency of wireless headset.When listening to, the volume of above-mentioned household electrical appliance can transfer to minimum, until being " 0 ".
This circuit transmits by force, in the scope of 10 rice diameters, all can well receive.
This device can be installed in the shell, as an annex of above-mentioned household electrical appliance.Also can directly design in household appliances shell, as a functional parts of household electrical appliance.
Claims (1)
1, the audio signal repeater, it is characterized in that, it has triode BG1, the base stage of triode is through capacitor C 1 and resistance R 1, one end of another resistance R 2 links to each other, the other end of resistance R 1 is connected on the joint J1, another termination power E negative pole of another resistance R 2, be connected with the 3rd resistance R 3 and another capacitor C 2 between transistor base and the power supply E positive pole, the inductance coil L that is connected in parallel, one end of the 3rd capacitor C 3 links to each other with the collector electrode of triode and is connected with antenna ANT, the positive pole of another termination power E, between the collector electrode and emitter of triode, be connected with the 4th capacitor C 4 and the 5th capacitor C 5 between emitter and the power supply E positive pole respectively, the emitter of triode also connects the negative pole of power supply E through the 4th resistance R 4, also be connected to another joint J2 on the negative pole of power supply E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088126 CN2834028Y (en) | 2005-10-15 | 2005-10-15 | Audio signal repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088126 CN2834028Y (en) | 2005-10-15 | 2005-10-15 | Audio signal repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2834028Y true CN2834028Y (en) | 2006-11-01 |
Family
ID=37198343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520088126 Expired - Fee Related CN2834028Y (en) | 2005-10-15 | 2005-10-15 | Audio signal repeater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2834028Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596111A (en) * | 2018-12-05 | 2019-04-09 | 柳州铁道职业技术学院 | A kind of total station for passing on a message |
-
2005
- 2005-10-15 CN CN 200520088126 patent/CN2834028Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596111A (en) * | 2018-12-05 | 2019-04-09 | 柳州铁道职业技术学院 | A kind of total station for passing on a message |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |