CN104702296A - Wireless frequency modulation transmission circuit - Google Patents
Wireless frequency modulation transmission circuit Download PDFInfo
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- CN104702296A CN104702296A CN201310646121.9A CN201310646121A CN104702296A CN 104702296 A CN104702296 A CN 104702296A CN 201310646121 A CN201310646121 A CN 201310646121A CN 104702296 A CN104702296 A CN 104702296A
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- inductance
- frequency modulation
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Abstract
The invention discloses a wireless frequency modulation transmission circuit comprising first to third resistors, first to ninth capacitors, a first inductor, a second inductor, a first triode, a second triode, an antenna, and a power source. The positive electrode of the power source is connected with a first end of the second inductor, a first end of the eighth capacitor, a first end of the third resistor, a first end of the first resistor, a first end of the fourth capacitor, a first end of the first inductor and a first end of the seventh capacitor. The working voltage of the wireless frequency modulation transmission circuit is 9V. Audio signals are filtered by the first capacitor, input to the first triode for amplification, and then input to a high-frequency oscillator composed of the second triode, the second inductor and the eighth capacitor, and sound signals are transmitted out by the antenna after modulated. The wireless frequency modulation transmission circuit of the invention has the advantages of simple structure, long transmission distance, good sound quality and stable frequency, and has popularization and application values.
Description
Technical field
The present invention relates to a kind of radiating circuit, particularly relate to a kind of wireless frequency modulation radiating circuit.
Background technology
Along with the development of society and the progress of science and technology, radiotechnics is more and more ripe, radiotechnics is the technology by radio wave propagated signal, its principle is, in conductor, the change of electric current power can produce radio wave, utilize this phenomenon, can information be loaded on radio wave by modulation, when electric wave arrives receiving end by spatial, the change of electromagnetic field that electric wave causes again can generation current in the conductor, by demodulation, information is extracted from curent change, just reach the object that information is transmitted, when carrying out short distance communication, radiotechnics is especially widely used, but traditional radio transmitter circuit complex structure, clutter is more, transmission range is short, job insecurity.
Summary of the invention
Object of the present invention is just to provide a kind of wireless frequency modulation radiating circuit to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of wireless frequency modulation radiating circuit, comprises the first resistance to the 3rd resistance, first electric capacity is to the 9th electric capacity, first inductance, second inductance, first triode, second triode, antenna and power supply, the positive pole of described power supply respectively with the first end of described second inductance, the first end of described 8th electric capacity, the first end of described 3rd resistance, the first end of described first resistance, the first end of described 4th electric capacity, the first end of described first inductance and the first end of described 7th electric capacity, the second end of described second inductance respectively with the first end of described 9th electric capacity, second end of described 8th electric capacity, second end of described 3rd resistance, the first end of described 6th electric capacity, the base stage of described second triode is connected with the collector electrode of described second triode, and the second end of described 9th electric capacity is connected with described antenna, the second end of described 6th electric capacity respectively with the second end of described first resistance, second end of described 4th electric capacity, second end of described first inductance, the first end of described 5th electric capacity, the collector electrode of described first triode, the base stage of described first triode, the first end of described first electric capacity is connected with the first end of described second electric capacity, and the second end of described first electric capacity is signal input part, the emitter of described first triode respectively with the first end of described second resistance, second end of described 5th electric capacity is connected with the first end of described 3rd electric capacity, the negative pole of described power supply respectively with the emitter of described second triode, second end of described second electric capacity, second end of described second resistance, second end of described 3rd electric capacity is connected with the second end of described 7th electric capacity.
Beneficial effect of the present invention is:
The operating voltage of wireless frequency modulation radiating circuit of the present invention is 9V, audio signal is after the first capacitor filtering, input the first triode to amplify, input the high-frequency generator be made up of the second triode, the second inductance and the 8th electric capacity again, voice signal is gone out by antenna transmission after modulation treatment, and structure of the present invention is simple, long transmission distance, acoustical sound, frequency stabilization, has the value promoted the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of wireless frequency modulation radiating circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, wireless frequency modulation radiating circuit of the present invention, comprises the first resistance R1 to the 3rd resistance R3, first electric capacity C1 is to the 9th electric capacity C9, first inductance L 1, second inductance L 2, first triode T1, second triode T2, the positive pole of antenna ANT and power supply E, power supply E respectively with the first end of the second inductance L 2, the first end of the 8th electric capacity C8, the first end of the 3rd resistance R3, the first end of the first resistance R1, the first end of the 4th electric capacity C4, the first end of the first inductance L 1 and the first end of the 7th electric capacity C7, the second end of the second inductance L 2 respectively with the first end of the 9th electric capacity C9, second end of the 8th electric capacity C8, second end of the 3rd resistance R3, the first end of the 6th electric capacity C6, the base stage of the second triode T2 is connected with the collector electrode of the second triode T2, and second end of the 9th electric capacity C9 is connected with antenna ANT, second end of the 6th electric capacity C6 respectively with second end of the first resistance R1, second end of the 4th electric capacity C4, second end of the first inductance L 1, the first end of the 5th electric capacity C5, the collector electrode of the first triode T1, the base stage of the first triode T1, the first end of the first electric capacity C1 is connected with the first end of the second electric capacity C2, and second end of the first electric capacity C1 is signal input part, the emitter of the first triode T1 respectively with the first end of the second resistance R2, second end of the 5th electric capacity C5 is connected with the first end of the 3rd electric capacity C3, the negative pole of power supply E respectively with the emitter of the second triode T2, second end of the second electric capacity C2, second end of the second resistance R2, second end of the 3rd electric capacity C3 is connected with second end of the 7th electric capacity C7.
The operation principle of wireless frequency modulation radiating circuit of the present invention is as follows:
The model of the first triode T1 is D40, the model of the second triode T2 is C1970, the operating voltage of this radiating circuit is 9V, audio signal is after the first electric capacity C1 filtering, input the first triode T1 to amplify, input the high-frequency generator be made up of the second triode T2, the second inductance L 2 and the 8th electric capacity C8 again, voice signal is launched by antenna ANT after modulation treatment.
Claims (1)
1. a wireless frequency modulation radiating circuit, is characterized in that: comprise the first resistance to the 3rd resistance, first electric capacity is to the 9th electric capacity, first inductance, second inductance, first triode, second triode, antenna and power supply, the positive pole of described power supply respectively with the first end of described second inductance, the first end of described 8th electric capacity, the first end of described 3rd resistance, the first end of described first resistance, the first end of described 4th electric capacity, the first end of described first inductance and the first end of described 7th electric capacity, the second end of described second inductance respectively with the first end of described 9th electric capacity, second end of described 8th electric capacity, second end of described 3rd resistance, the first end of described 6th electric capacity, the base stage of described second triode is connected with the collector electrode of described second triode, and the second end of described 9th electric capacity is connected with described antenna, the second end of described 6th electric capacity respectively with the second end of described first resistance, second end of described 4th electric capacity, second end of described first inductance, the first end of described 5th electric capacity, the collector electrode of described first triode, the base stage of described first triode, the first end of described first electric capacity is connected with the first end of described second electric capacity, and the second end of described first electric capacity is signal input part, the emitter of described first triode respectively with the first end of described second resistance, second end of described 5th electric capacity is connected with the first end of described 3rd electric capacity, the negative pole of described power supply respectively with the emitter of described second triode, second end of described second electric capacity, second end of described second resistance, second end of described 3rd electric capacity is connected with the second end of described 7th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646121.9A CN104702296A (en) | 2013-12-04 | 2013-12-04 | Wireless frequency modulation transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646121.9A CN104702296A (en) | 2013-12-04 | 2013-12-04 | Wireless frequency modulation transmission circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104702296A true CN104702296A (en) | 2015-06-10 |
Family
ID=53349108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310646121.9A Pending CN104702296A (en) | 2013-12-04 | 2013-12-04 | Wireless frequency modulation transmission circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104702296A (en) |
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2013
- 2013-12-04 CN CN201310646121.9A patent/CN104702296A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |