CN104660275A - Short wave amplitude modulated transmitter circuit - Google Patents
Short wave amplitude modulated transmitter circuit Download PDFInfo
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- CN104660275A CN104660275A CN201310606480.1A CN201310606480A CN104660275A CN 104660275 A CN104660275 A CN 104660275A CN 201310606480 A CN201310606480 A CN 201310606480A CN 104660275 A CN104660275 A CN 104660275A
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- resistance
- triode
- electric capacity
- amplitude modulated
- transmitter circuit
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Abstract
The invention discloses a short wave amplitude modulated transmitter circuit. The short wave amplitude modulated transmitter circuit comprises a battery, a transformer, an antenna, first to fifth capacitors, first to sixth resistors, a sound pickup, a first triode, a second triode, an oscillator and an inductor, wherein, sound signals are picked up by the sound pickup and then amplified by the first triode; the second triode generates carrier frequency; the amplitude of the carrier signals is outputted by a collector of the triode, and then transmitted to the antenna in the air in an electromagnetic wave manner; the antenna can be tuned to a certain frequency, and the transmitted signals can be received. The short wave amplitude modulated transmitter circuit disclosed by the invention is simple in structure, less in components and parts, low in cost, and convenient to manufacture, avoids drifting of resonant frequency caused by change of temperature and humidity, and is free of distortion and noise.
Description
Technical field
The present invention relates to a kind of transmitter circuitry, particularly relate to a kind of shortwave amplitude modulated transmitter circuit.
Background technology
The main task of amplitude modulated transmitter be useful low frequency signal to the modulation of high frequency carrier, become the electromagnetic wave that there is certain bandwidth in a certain centre frequency, be applicable to by antenna transmission.But most of transmitter circuitry complicated structure, cost is higher, is not easy to make, and often because the change of temperature and humidity causes the drift of resonance frequency, often occurs distortion and noise.
Summary of the invention
Object of the present invention is just to provide a kind of shortwave amplitude modulated transmitter circuit to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of shortwave amplitude modulated transmitter circuit, comprises battery, transformer, antenna, first electric capacity is to the 5th electric capacity, first resistance is to the 6th resistance, pick-up, first triode, second triode, oscillator and inductance, the positive pole of described battery respectively with the first end of described inductance, the first end of described 4th resistance, the first end of described 5th resistance is connected with the first end of described 6th resistance, and the second end of described inductance is connected with the emitter of described first triode, the base stage of described first triode respectively with the second end of described 5th resistance, the first end of described 3rd resistance is connected with the first end of described 5th electric capacity, the collector electrode of described first triode respectively with the first end of described second electric capacity, the first end of described 3rd electric capacity is connected with the collector electrode of described second triode, and the second end of described 3rd electric capacity is connected with the first end of described oscillator, the second end of described oscillator respectively with the base stage of described second triode, second end of described 4th resistance is connected with the first end of described second resistance, the emitter of described second triode is connected with the first end of described first resistance and the first end of described 4th electric capacity respectively, second end of described second electric capacity is connected with the first end of the first end of described first electric capacity and the primary coil of described transformer respectively, second end of described 5th electric capacity is connected with described second end of the 6th resistance and the first end of described pick-up respectively, the second end of described pick-up respectively with the second end of described 3rd resistance, second end of described second resistance, second end of described first resistance, second end of described 4th electric capacity, second end of described first electric capacity, second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the negative pole of described battery, and the second end of the secondary coil of described transformer is connected with described antenna.
Beneficial effect of the present invention is:
The present invention is a kind of shortwave amplitude modulated transmitter circuit, and circuit structure is simple, and components and parts are less, and cost is low, is convenient to make, and the drift of resonance frequency that the change avoiding temperature and humidity causes, there will not be distortion and noise.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of shortwave amplitude modulated transmitter of the present invention circuit.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of shortwave amplitude modulated transmitter of the present invention circuit, comprises battery E, transformer T, antenna TX, first electric capacity C1 is to the 5th electric capacity C5, first resistance R1 is to the 6th resistance R6, pick-up BM, first triode VT1, second triode VT2, oscillator X and inductance L, the positive pole of battery E respectively with the first end of inductance L, the first end of the 4th resistance R4, the first end of the 5th resistance R5 is connected with the first end of the 6th resistance R6, and the second end of inductance L is connected with the emitter of the first triode VT1, the base stage of the first triode VT1 respectively with second end of the 5th resistance R5, the first end of the 3rd resistance R3 is connected with the first end of the 5th electric capacity C5, the collector electrode of the first triode VT1 respectively with the first end of the second electric capacity C2, the first end of the 3rd electric capacity C3 is connected with the collector electrode of the second triode VT2, and second end of the 3rd electric capacity C3 is connected with the first end of oscillator X, second end of oscillator X respectively with the base stage of the second triode VT2, second end of the 4th resistance R4 is connected with the first end of the second resistance R2, the emitter of the second triode VT2 is connected with the first end of the first resistance R1 and the first end of the 4th electric capacity C4 respectively, second end of the second electric capacity C2 is connected with the first end of the first end of the first electric capacity C1 and the primary coil of transformer T respectively, second end of the 5th electric capacity C5 is connected with second end of the 6th resistance R6 and the first end of pick-up BM respectively, second end of pick-up BM respectively with second end of the 3rd resistance R3, second end of the second resistance R2, second end of the first resistance R1, second end of the 4th electric capacity C4, second end of the first electric capacity C1, second end of the primary coil of transformer T, the first end of the secondary coil of transformer T is connected with the negative pole of battery E, and the second end of the secondary coil of transformer T is connected with antenna TX.
Audio signal is amplified by the first triode VT1 after pick-up BM picks up, second triode VT2 produces carrier frequency, the amplitude modulation of carrier signal is exported by the collector electrode of triode, and be sent to aerial antenna TX in the form of an electromagnetic wave, this antenna TX can be tuned to a specific frequency, the signal sent can be received, and there will not be distortion and noise.
Claims (1)
1. a shortwave amplitude modulated transmitter circuit, is characterized in that: comprise battery, transformer, antenna, first electric capacity is to the 5th electric capacity, first resistance is to the 6th resistance, pick-up, first triode, second triode, oscillator and inductance, the positive pole of described battery respectively with the first end of described inductance, the first end of described 4th resistance, the first end of described 5th resistance is connected with the first end of described 6th resistance, and the second end of described inductance is connected with the emitter of described first triode, the base stage of described first triode respectively with the second end of described 5th resistance, the first end of described 3rd resistance is connected with the first end of described 5th electric capacity, the collector electrode of described first triode respectively with the first end of described second electric capacity, the first end of described 3rd electric capacity is connected with the collector electrode of described second triode, and the second end of described 3rd electric capacity is connected with the first end of described oscillator, the second end of described oscillator respectively with the base stage of described second triode, second end of described 4th resistance is connected with the first end of described second resistance, the emitter of described second triode is connected with the first end of described first resistance and the first end of described 4th electric capacity respectively, second end of described second electric capacity is connected with the first end of the first end of described first electric capacity and the primary coil of described transformer respectively, second end of described 5th electric capacity is connected with described second end of the 6th resistance and the first end of described pick-up respectively, the second end of described pick-up respectively with the second end of described 3rd resistance, second end of described second resistance, second end of described first resistance, second end of described 4th electric capacity, second end of described first electric capacity, second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the negative pole of described battery, and the second end of the secondary coil of described transformer is connected with described antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310606480.1A CN104660275A (en) | 2013-11-25 | 2013-11-25 | Short wave amplitude modulated transmitter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310606480.1A CN104660275A (en) | 2013-11-25 | 2013-11-25 | Short wave amplitude modulated transmitter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104660275A true CN104660275A (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310606480.1A Pending CN104660275A (en) | 2013-11-25 | 2013-11-25 | Short wave amplitude modulated transmitter circuit |
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| CN (1) | CN104660275A (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 |
-
2013
- 2013-11-25 CN CN201310606480.1A patent/CN104660275A/en active Pending
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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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |