CN201150056Y - Radio emitter - Google Patents
Radio emitter Download PDFInfo
- Publication number
- CN201150056Y CN201150056Y CNU2007200609388U CN200720060938U CN201150056Y CN 201150056 Y CN201150056 Y CN 201150056Y CN U2007200609388 U CNU2007200609388 U CN U2007200609388U CN 200720060938 U CN200720060938 U CN 200720060938U CN 201150056 Y CN201150056 Y CN 201150056Y
- Authority
- CN
- China
- Prior art keywords
- oscillator
- radio transmitter
- resistance
- base
- transmitting set
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The utility model discloses a radio transmitter, which comprises a power supply circuit used for supplying power for the radio transmitter, and also comprises an audio frequency amplifier and an oscillator, wherein, the audio frequency amplifier comprises a first emitter transistor (Q1) which can transmit amplified signals to the base electrode of the oscillator, the oscillator comprises an oscillation coil which can adjust the working frequency of the oscillator, a capacitor and a bias voltage element. The first emitter transistor (Q1) is connected with the base electrode capacitance (C2) which can be charged through a fourth resistance (R4), and the oscillation coil is connected with the fifth base electrode capacitance (C2) which can be charged through a fifth resistance (R5). The radio transmitter has the advantages that the operation is simple, the structure is simple, the radio transmitter is entertaining, the science popularization is easy to widely develop among the teenagers by adopting the radio transmitter, and the practical operation ability and the scientific interest of teenagers can be enhanced.
Description
Technical field
The utility model relates to technical field of radio, especially a kind of transmitting set.
Background technology
The transmitting set of prior art, wireless automatic reception of energy and emission information possess the good communication function, but exist operation loaded down with trivial details, the deficiency of structure more complicated, some operation may need the professional person to operate, and is unfavorable for the popularization of radiotechnics.
Summary of the invention
The purpose of this utility model provides a kind of transmitting set simple to operate.
For realizing above purpose, the utility model has been taked following technical scheme: a kind of transmitting set, the power circuit that comprises promising transmitting set power supply, also include audio frequency amplifier and oscillator, described audio frequency is sent out device big and is comprised the first emitter-base bandgap grading transistor Q1 that the signal that amplifies can be delivered to the oscillator base stage, and described oscillator comprises concussion coil, capacitor and the biased element that can adjust the oscillator operating frequency.
The described first emitter-base bandgap grading transistor Q1 with can be connected by the base capacity C2 of the 4th resistance R 4 charging, described concussion coil is connected with can charging by the 5th base capacity C5 of the 5th resistance R 5.
The utility model transmitting set compared with prior art has following technique effect: simple to operate, arrangement furthermore proposes, interesting joyful, be easy to extensively be carried out in by teen-age activity to popularize scientific knowledge, improve teen-age manipulative ability and scientific interest.
Description of drawings
Fig. 1 is the utility model transmitting set electrical block diagram;
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further:
See also shown in Figure 1, a kind of transmitting set, the power circuit that comprises promising transmitting set power supply, also include audio frequency amplifier and oscillator, described audio frequency is sent out device big and is comprised the first emitter-base bandgap grading transistor Q1 that the signal that amplifies can be delivered to the oscillator base stage, and described oscillator comprises concussion coil, capacitor and the biased element that can adjust the oscillator operating frequency.The described first emitter-base bandgap grading transistor Q1 with can be connected by the base capacity C2 of the 4th resistance R 4 charging, described concussion coil is connected with can charging by the 5th base capacity C5 of the 5th resistance R 5.
The gain of the first emitter-base bandgap grading transistor Q1 is about 20 to 50, the signal that amplifies is sent to the base stage of oscillator stage.The operating frequency of oscillator stage Q2 is about 88MHz, this frequency is adjusted by oscillator coil (5 circles) and 47pF capacitor totally, this frequency is decided by that also transistor Q2,18pF feed back capacitor and also have minority biased element, for example 470 Ω emitter resistances and 22K base resistance.Coil need be with enamel covered wire or the tinning copper cash of one section No. 22 BS (Φ 0.5mm) or No. 24 BS (Φ is m.71mm), on the bobbin of 3mm diameter around 5 circles, as on medium-sized screwdriver around also can, between will enclosing and enclose then about separated 5.5mm.When adjusting frequency to the end, will change output frequency by with compression before and after the coil or elongation.
During power connection, 1nF base capacity device C3 charges gradually by 22K resistance R 4, and 18pF base capacity C5 then charges through 470 resistance (R5) of oscillator coil, but its charging rate is faster, and 47pF electric capacity also
Claims (2)
1. transmitting set, the power circuit that comprises promising transmitting set power supply, it is characterized in that: also include audio frequency amplifier and oscillator, described audio frequency is sent out device big and is comprised the first emitter-base bandgap grading transistor (Q1) that the signal that amplifies can be delivered to the oscillator base stage, and described oscillator comprises concussion coil, capacitor and the biased element that can adjust the oscillator operating frequency.
2. transmitting set according to claim 1, it is characterized in that: the described first emitter-base bandgap grading transistor (Q1) with can be connected by second base capacity (C2) of the 4th resistance (R4) charging, described concussion coil with can be connected by the 5th base capacity (C5) that the 5th resistance (R5) charges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200609388U CN201150056Y (en) | 2007-12-05 | 2007-12-05 | Radio emitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200609388U CN201150056Y (en) | 2007-12-05 | 2007-12-05 | Radio emitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201150056Y true CN201150056Y (en) | 2008-11-12 |
Family
ID=40117828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200609388U Expired - Fee Related CN201150056Y (en) | 2007-12-05 | 2007-12-05 | Radio emitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201150056Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427851A (en) * | 2012-05-22 | 2013-12-04 | 成都酷玩网络科技有限公司 | Multifunctional miniature frequency modulation emitter |
-
2007
- 2007-12-05 CN CNU2007200609388U patent/CN201150056Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427851A (en) * | 2012-05-22 | 2013-12-04 | 成都酷玩网络科技有限公司 | Multifunctional miniature frequency modulation emitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20100105 |