CN104702295A - Remote low-power radio frequency-modulated transmitter - Google Patents
Remote low-power radio frequency-modulated transmitter Download PDFInfo
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- CN104702295A CN104702295A CN201310646094.5A CN201310646094A CN104702295A CN 104702295 A CN104702295 A CN 104702295A CN 201310646094 A CN201310646094 A CN 201310646094A CN 104702295 A CN104702295 A CN 104702295A
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- resistance
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- triode
- radio frequency
- audio signal
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Abstract
The invention discloses a remote low-power radio frequency-modulated transmitter comprising first to sixth resistors, first to six capacitors, a first triode, a second triode, a diode, a radio frequency choke coil, an inductor, an antenna, an audio signal input device, and a power supply. A first end of the first resistor is connected with the positive electrode of the power supply, a first end of the second resistor, a first end of the third resistor, and a first end of the radio frequency choke coil. According to the remote low-power radio frequency-modulated transmitter of the invention, the second triode and peripheries thereof constitute a high-frequency oscillator. An audio signal input by the audio signal input device is amplified by the first triode first, the low-frequency signal after amplification modulates high-frequency carrier, and the audio signal is transmitted via the antenna after modulation. The remote low-power radio frequency-modulated transmitter of the invention has the advantages of simple structure, less noise, long transmission distance and stable work, and has popularization and application values.
Description
Technical field
The present invention relates to a kind of frequency-modulated transmitter, particularly relate to a kind of remote low powered radio frequency-modulated transmitter.
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 transmitting set 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 remote low powered radio frequency-modulated transmitter to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of remote low powered radio frequency-modulated transmitter, comprises the first resistance to the 6th resistance, first electric capacity is to the 6th electric capacity, first triode, second triode, diode, radio-frequency choke, inductance, antenna, audio signal loader and power supply, the first end of described first resistance respectively with the positive pole of described power supply, the first end of described second resistance, the first end of described 3rd resistance is connected with the first end of described radio-frequency choke, second end of described first resistance is connected with the first end of described first electric capacity and the first end of described audio signal loader respectively, second end of described second resistance is connected with the second end of described first electric capacity and the base stage of described first triode respectively, second end of described 3rd resistance is connected with the collector electrode of described first triode and the first end of described 4th resistance respectively, the second end of described 4th resistance respectively with the first end of described 5th resistance, the negative pole of described diode is connected with the first end of described 3rd electric capacity, the second end of described radio-frequency choke respectively with the first end of described 4th electric capacity, the first end of described 6th electric capacity, the first end of described inductance is connected with described antenna, the second end of described 4th electric capacity respectively with the second end of described 3rd electric capacity, second end of described 5th electric capacity, the first end of described 6th resistance is connected with the base stage of described second triode, the second end of described 6th electric capacity respectively with the second end of described 6th resistance, the collector electrode of described second triode, the first end of described second electric capacity is connected with the second end of described inductance, the negative pole of described power supply respectively with the second end of described audio signal loader, the collector electrode of described first triode, second end of described 5th resistance, the positive pole of described diode, second end of described 5th electric capacity, the emitter of described second triode is connected with the second end of described second electric capacity.
Beneficial effect of the present invention is:
The remote low powered radio frequency-modulated transmitter of the present invention forms high-frequency generator by the second triode and its peripheral element, the audio signal of audio signal loader input is first amplified through the first triode, low frequency signal after amplification is modulated high frequency carrier again, through antenna, audio signal is launched after modulation, structure of the present invention is simple, noise is few, long transmission distance, working stability, has popularizing value.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the remote low powered radio frequency-modulated transmitter of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the remote low powered radio frequency-modulated transmitter of the present invention, comprises the first resistance R1 to the 6th resistance R6, first electric capacity C1 is to the 6th electric capacity C6, first triode T1, second triode T2, diode D, radio-frequency choke L1, inductance L 2, antenna ANT, the first end of audio signal loader B and power supply E, the first resistance R1 respectively with the positive pole of power supply E, the first end of the second resistance R2, the first end of the 3rd resistance R3 is connected with the first end of radio-frequency choke L1, second end of the first resistance R1 is connected with the first end of the first electric capacity C1 and the first end of audio signal loader B respectively, second end of the second resistance R2 is connected with second end of the first electric capacity C1 and the base stage of the first triode T1 respectively, second end of the 3rd resistance R3 is connected with the collector electrode of the first triode T1 and the first end of the 4th resistance R4 respectively, second end of the 4th resistance R4 respectively with the first end of the 5th resistance R5, the negative pole of diode D is connected with the first end of the 3rd electric capacity C3, second end of radio-frequency choke L1 respectively with the first end of the 4th electric capacity C4, the first end of the 6th electric capacity C6, the first end of inductance L 2 is connected with antenna ANT, second end of the 4th electric capacity C4 respectively with second end of the 3rd electric capacity C3, second end of the 5th electric capacity C5, the first end of the 6th resistance R6 is connected with the base stage of the second triode T2, second end of the 6th electric capacity C6 respectively with second end of the 6th resistance R6, the collector electrode of the second triode T2, the first end of the second electric capacity C2 is connected with the second end of inductance L 2, the negative pole of power supply E respectively with second end of audio signal loader B, the collector electrode of the first triode T1, second end of the 5th resistance R5, the positive pole of diode D, second end of the 5th electric capacity C5, the emitter of the second triode T2 is connected with second end of the second electric capacity C2.
The operation principle of the present invention's remote low powered radio frequency-modulated transmitter is as follows:
The model of the second triode T2 is FF501, frequency-modulated transmitter forms high-frequency generator by the second triode T2 and its peripheral element, the audio signal that audio signal loader B inputs first is amplified through the first triode T1, low frequency signal after amplification is modulated high frequency carrier again, audio signal is launched after modulation through antenna ANT.
Claims (1)
1. a remote low powered radio frequency-modulated transmitter, is characterized in that: comprise the first resistance to the 6th resistance, first electric capacity is to the 6th electric capacity, first triode, second triode, diode, radio-frequency choke, inductance, antenna, audio signal loader and power supply, the first end of described first resistance respectively with the positive pole of described power supply, the first end of described second resistance, the first end of described 3rd resistance is connected with the first end of described radio-frequency choke, second end of described first resistance is connected with the first end of described first electric capacity and the first end of described audio signal loader respectively, second end of described second resistance is connected with the second end of described first electric capacity and the base stage of described first triode respectively, second end of described 3rd resistance is connected with the collector electrode of described first triode and the first end of described 4th resistance respectively, the second end of described 4th resistance respectively with the first end of described 5th resistance, the negative pole of described diode is connected with the first end of described 3rd electric capacity, the second end of described radio-frequency choke respectively with the first end of described 4th electric capacity, the first end of described 6th electric capacity, the first end of described inductance is connected with described antenna, the second end of described 4th electric capacity respectively with the second end of described 3rd electric capacity, second end of described 5th electric capacity, the first end of described 6th resistance is connected with the base stage of described second triode, the second end of described 6th electric capacity respectively with the second end of described 6th resistance, the collector electrode of described second triode, the first end of described second electric capacity is connected with the second end of described inductance, the negative pole of described power supply respectively with the second end of described audio signal loader, the collector electrode of described first triode, second end of described 5th resistance, the positive pole of described diode, second end of described 5th electric capacity, the emitter of described second triode is connected with the second end of described second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646094.5A CN104702295A (en) | 2013-12-04 | 2013-12-04 | Remote low-power radio frequency-modulated transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646094.5A CN104702295A (en) | 2013-12-04 | 2013-12-04 | Remote low-power radio frequency-modulated transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104702295A true CN104702295A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310646094.5A Pending CN104702295A (en) | 2013-12-04 | 2013-12-04 | Remote low-power radio frequency-modulated transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579742A (en) * | 2017-08-10 | 2018-01-12 | 江西吉斯电子科技有限公司 | A kind of new frequency modulation transmitter |
-
2013
- 2013-12-04 CN CN201310646094.5A patent/CN104702295A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579742A (en) * | 2017-08-10 | 2018-01-12 | 江西吉斯电子科技有限公司 | A kind of new frequency modulation transmitter |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |