CN203522990U - Highly-sensitive wireless microphone with far data transmission distance - Google Patents
Highly-sensitive wireless microphone with far data transmission distance Download PDFInfo
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- CN203522990U CN203522990U CN201320666499.0U CN201320666499U CN203522990U CN 203522990 U CN203522990 U CN 203522990U CN 201320666499 U CN201320666499 U CN 201320666499U CN 203522990 U CN203522990 U CN 203522990U
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- resistance
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- capacitor
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Abstract
The utility model discloses a highly-sensitive wireless microphone with far data transmission distance. The highly-sensitive wireless microphone comprises resistors from the first resistor to the ninth resistor, capacitors from the first capacitor to the eleventh capacitor, triodes from the first triode to the third triode, inductors from the first inductor to the third inductor, a power supply, a switch, an antenna and a microphone. According to the highly-sensitive wireless microphone with far data transmission distance, a electret capacitor microphone is served as an electro-acoustical converter for picking up ambient sound wave signals and outputting corresponding electrical signals, and bandwidth compression is carried out by a pre-emphasis circuit composed of resistor-capacitor elements, thereby increasing the modulation volume of voice; and the audio signals are sent out through the antenna after modulation through elements such as the amplifier, the data transmission distance of the wireless microphone can reach to 400 meters by adopting the circuit, and the application of the wireless microphone is no longer limited by distance.
Description
Technical field
The utility model relates to a kind of wireless microphone, relates in particular to a kind of highly sensitive wireless microphone of long distance for data.
Background technology
The development of science and technology has promoted the raising of people's qualities of life, increasing sci-tech product has infiltrated people's life, microphone is by the general place that need to amplify of applying to, but part microphone is still provided with data wire, be unfavorable for using the people's of microphone movement, limited the moving range of microphone simultaneously, and the data transmission distance of part wireless microphone is nearer now, in the time of away from receiver, will make signal data transmitting disturb or occur noise, affect the use of microphone.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of highly sensitive wireless microphone of long distance for data.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of highly sensitive wireless microphone of long distance for data, comprise the first resistance to the nine resistance, the first electric capacity to the 11 electric capacity, the first triode to the three triodes, the first inductance to the three inductance, power supply, switch, antenna and microphone, the first end of described microphone respectively with the first end of described the 3rd electric capacity, the first end of described the second electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the first electric capacity, the first end of described the 3rd resistance, the first end of described the 5th resistance, the first end of described the 7th resistance, the first end of described the 7th electric capacity, the first end of described the 4th electric capacity, the first end of described the 5th electric capacity, the first end of described the first inductance, the collector electrode of described the 3rd triode, the first end of described switch connects, the second end ground connection of described the first electric capacity, the second end of described switch is connected with the positive pole of described power supply, the minus earth of described power supply, the second end of described the 3rd electric capacity is connected with the first end of described the second resistance, the second end of described the 3rd resistance respectively with the second end of described the second electric capacity, the second end of described the second resistance, the first end of described the 9th resistance is connected with the base stage of described the first triode, the second end of described the 5th resistance is connected with the collector electrode of described the first triode with the first end of described the 11 electric capacity respectively, described the first triode emitter be connected with the first end of described the 4th resistance, the second end of described the 11 electric capacity respectively with the second end of described the 7th resistance, the second end of described the 7th electric capacity is connected with the base stage of described the second triode, the second end of described the 4th electric capacity respectively with respectively with the collector electrode of described the second triode, the second end of the first end of described the 6th electric capacity and described the first inductance is connected, the emitter of described the second triode respectively with the second end of described the 6th electric capacity, the first end of described the 6th resistance is connected with the second end of described the 5th electric capacity, the intermediate ends of described the first inductance is connected with the first end of described the 8th electric capacity, the second end of described the 8th electric capacity is connected with the base stage of described the 3rd triode with the first end of described the 8th resistance respectively, the emitter of described the 3rd triode respectively with the first end of described the 9th electric capacity, the first end of described the second inductance is connected with the first end of described the tenth electric capacity, the second end of described the tenth electric capacity is connected with described the 3rd inductance, the second end of described the 3rd inductance is connected with described antenna, the second end of described microphone respectively with the second end of described the 9th resistance, the second end of described the 4th resistance, the second end of described the 6th resistance, the second end of described the 8th resistance, the second end of described the 9th electric capacity is connected with the second end of described the second inductance.
The beneficial effects of the utility model are:
The highly sensitive wireless microphone of the utility model long distance for data, acoustical-electrical transducer is served as by electret capacitor microphone, after picking up surrounding environment acoustic signals, export corresponding electric signal, the preemphasis circuit forming through Resistor-Capacitor Unit carries out bandwidth reduction, to improve the modulation volume of speech, after amplifier etc. carries out audio signal modulation, by antenna transmission, gone out, use this circuit can make the data transmission distance of wireless microphone reach 400 meters, use wireless microphone will no longer be subject to distance limit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the highly sensitive wireless microphone of the utility model long distance for data.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the highly sensitive wireless microphone of the utility model long distance for data, comprises that the first resistance R 1 is to the 9th resistance R 9, the first capacitor C 1 to the 11 capacitor C 11, the first triode VT1 to the three triode VT3, the first inductance L 1 is to the 3rd inductance L 3, power supply E, switch S, antenna ANT and microphone G, the first end of microphone G respectively with the first end of the 3rd capacitor C 3, the first end of the second capacitor C 2 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 respectively with the first end of the first capacitor C 1, the first end of the 3rd resistance R 3, the first end of the 5th resistance R 5, the first end of the 7th resistance R 7, the first end of the 7th capacitor C 7, the first end of the 4th capacitor C 4, the first end of the 5th capacitor C 5, the first end of the first inductance L 1, the collector electrode of the 3rd triode VT3, the first end of switch S connects, the second end ground connection of the first capacitor C 1, the second end of switch S is connected with the positive pole of power supply E, the minus earth of power supply E, the second end of the 3rd capacitor C 3 is connected with the first end of the second resistance R 2, the second end of the 3rd resistance R 3 respectively with the second end of the second capacitor C 2, the second end of the second resistance R 2, the first end of the 9th resistance R 9 is connected with the base stage of the first triode VT1, the second end of the 5th resistance R 5 is connected with the collector electrode of the first triode VT1 with the first end of the 11 capacitor C 11 respectively, the first triode VT1 emitter be connected with the first end of the 4th resistance R 4, the second end of the 11 capacitor C 11 respectively with the second end of the 7th resistance R 7, the second end of the 7th capacitor C 7 is connected with the base stage of the second triode VT2, the second end of the 4th capacitor C 4 respectively with respectively with the collector electrode of the second triode VT2, the first end of the 6th capacitor C 6 is connected with the second end of the first inductance L 1, the emitter of the second triode VT2 respectively with the second end of the 6th capacitor C 6, the first end of the 6th resistance R 6 is connected with the second end of the 5th capacitor C 5, the intermediate ends of the first inductance L 1 is connected with the first end of the 8th capacitor C 8, the second end of the 8th capacitor C 8 is connected with the base stage of the 3rd triode VT3 with the first end of the 8th resistance R 8 respectively, the emitter of the 3rd triode VT3 respectively with the first end of the 9th capacitor C 9, the first end of the second inductance L 2 is connected with the first end of the tenth capacitor C 10, and the second end of the tenth capacitor C 10 is connected with the 3rd inductance L 3, and the second end of the 3rd inductance L 3 is connected with antenna ANT, the second end of microphone G respectively with the second end of the 9th resistance R 9, the second end of the 4th resistance R 4, the second end of the 6th resistance R 6, the second end of the 8th resistance R 8, the second end of the 9th capacitor C 9 is connected with the second end of the second inductance L 2.
The operation principle of the highly sensitive wireless microphone of the utility model long distance for data is as follows:
Acoustical-electrical transducer is served as by electret capacitor microphone G, after picking up surrounding environment acoustic signals, export corresponding electric signal, through the first capacitor C 1, send into the preemphasis circuit being formed by the second resistance R 2 and the second capacitor C 2 and carry out bandwidth reduction, to improve the modulation volume of speech.The first triode VT1 is audio frequency amplifier, and the audio signal after preemphasis is amplified, and delivers to the base stage of the second triode VT2 carry out frequency modulation(FM) through the 3rd capacitor C 3.The voltage of the second triode VT2 composition common base ultra-high frequency generator base stage and collector electrode changes with the audio signal of base stage input, thereby the junction capacitance of the base stage of making and collector electrode changes, the frequency of high-frequency generator also changes thereupon, thereby realizes frequency modulation(FM).The emitter-base bandgap grading output Class C high frequency power amplifier that the 3rd triode VT3 forms, its effect has two: the one, increase transmitting power, expand transmitting range; The 2nd, isolated antennas ANT and oscillator, reduce the impact of antenna ANT on oscillator frequency.Signal after radio frequency power amplifier has the emitter output of the 3rd triode VT3, through the tenth capacitor C 10, the 3rd inductance L 3, delivers to antenna ANT transmitting.The 3rd inductance L 3 is antenna ANT loading coil, while being less than quarter-wave for antenna ANT length, to improve antenna ANT emission effciency.
Claims (1)
1. the highly sensitive wireless microphone of a long distance for data, it is characterized in that: comprise the first resistance to the nine resistance, the first electric capacity to the 11 electric capacity, the first triode to the three triodes, the first inductance to the three inductance, power supply, switch, antenna and microphone, the first end of described microphone respectively with the first end of described the 3rd electric capacity, the first end of described the second electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the first electric capacity, the first end of described the 3rd resistance, the first end of described the 5th resistance, the first end of described the 7th resistance, the first end of described the 7th electric capacity, the first end of described the 4th electric capacity, the first end of described the 5th electric capacity, the first end of described the first inductance, the collector electrode of described the 3rd triode, the first end of described switch connects, the second end ground connection of described the first electric capacity, the second end of described switch is connected with the positive pole of described power supply, the minus earth of described power supply, the second end of described the 3rd electric capacity is connected with the first end of described the second resistance, the second end of described the 3rd resistance respectively with the second end of described the second electric capacity, the second end of described the second resistance, the first end of described the 9th resistance is connected with the base stage of described the first triode, the second end of described the 5th resistance is connected with the collector electrode of described the first triode with the first end of described the 11 electric capacity respectively, described the first triode emitter be connected with the first end of described the 4th resistance, the second end of described the 11 electric capacity respectively with the second end of described the 7th resistance, the second end of described the 7th electric capacity is connected with the base stage of described the second triode, the second end of described the 4th electric capacity respectively with respectively with the collector electrode of described the second triode, the second end of the first end of described the 6th electric capacity and described the first inductance is connected, the emitter of described the second triode respectively with the second end of described the 6th electric capacity, the first end of described the 6th resistance is connected with the second end of described the 5th electric capacity, the intermediate ends of described the first inductance is connected with the first end of described the 8th electric capacity, the second end of described the 8th electric capacity is connected with the base stage of described the 3rd triode with the first end of described the 8th resistance respectively, the emitter of described the 3rd triode respectively with the first end of described the 9th electric capacity, the first end of described the second inductance is connected with the first end of described the tenth electric capacity, the second end of described the tenth electric capacity is connected with described the 3rd inductance, the second end of described the 3rd inductance is connected with described antenna, the second end of described microphone respectively with the second end of described the 9th resistance, the second end of described the 4th resistance, the second end of described the 6th resistance, the second end of described the 8th resistance, the second end of described the 9th electric capacity is connected with the second end of described the second inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666499.0U CN203522990U (en) | 2013-10-28 | 2013-10-28 | Highly-sensitive wireless microphone with far data transmission distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666499.0U CN203522990U (en) | 2013-10-28 | 2013-10-28 | Highly-sensitive wireless microphone with far data transmission distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522990U true CN203522990U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666499.0U Expired - Fee Related CN203522990U (en) | 2013-10-28 | 2013-10-28 | Highly-sensitive wireless microphone with far data transmission distance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203522990U (en) |
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2013
- 2013-10-28 CN CN201320666499.0U patent/CN203522990U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20141028 |
|
| EXPY | Termination of patent right or utility model |