CN205304822U - Low -cost wireless broadcast receiving system - Google Patents
Low -cost wireless broadcast receiving system Download PDFInfo
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- CN205304822U CN205304822U CN201521107022.4U CN201521107022U CN205304822U CN 205304822 U CN205304822 U CN 205304822U CN 201521107022 U CN201521107022 U CN 201521107022U CN 205304822 U CN205304822 U CN 205304822U
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Abstract
The utility model discloses a low -cost wireless broadcast receiving system, including antenna A, inductance L1, adjustable electric capacity C2, chip IC1 and chip IC2, inductance L1's one end connecting resistance R1, adjustable electric capacity C1 and antenna A, adjustable electric capacity C2's the other end and chip IC1's pin 3 are connected to inductance L1's the other end, and electric capacity C1, electric capacity C4, electric capacity C7, speaker B, chip IC2's pin 2 and chip IC2's pin 4 are connected to chip IC1's pin 1. The utility model discloses low -cost wireless broadcast receiving system circuit structure is simple, components and parts are few, through using TA7642 integrated circuit chip, has save multipolar amplifier circuit and detection circuit, the circuit of very big simplification to utilize the integrated power amplifier of LM386 audio frequency as audio frequency interface element, consequently have small, the cost of manufacture is hanged down and convenient to use's advantage.
Description
Technical field
This utility model relates to field of wireless communication, specifically a kind of low-cost wireless broadcast receiver system.
Background technology
Wireless receiver is electronic equipment common in daily life, it is mainly used in the voice that sent by f-m broadcast station and music program wireless signal carries out detection, processing and amplifying, play back eventually through tone playing equipment, due to scientific and technological progress, sky has had the radio wave of a lot of different frequency in the air. If these many electric waves are all received, audio signal will as being among downtown area, many sound are mixed in together, result is not heard whatever, therefore the popularity rate of wireless receiver is significantly high, but the most structure of existing wireless receiver is complicated, and reason is in that inside it needs integrated multiple amplifier and signal processing original paper, the volume causing wireless receiver is relatively big, relatively costly.
Utility model content
The purpose of this utility model is in that to provide a kind of low-cost wireless broadcast receiver system, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme:
A kind of low-cost wireless broadcast receiver system, including antenna A, inductance L1, tunable capacitor C2, chip IC 1 and chip IC 2, one end of described inductance L1 connects resistance R1, tunable capacitor C1 and antenna A, the other end of inductance L1 connects the other end of tunable capacitor C2 and the pin 3 of chip IC 1, the pin 1 of chip IC 1 connects electric capacity C1, electric capacity C4, electric capacity C7, speaker B, the pin 2 of chip IC 2 and the pin 4 of chip IC 2, the pin 2 of chip IC 1 connects the other end of resistance R1, resistance R2, the other end of resistance R3 and electric capacity C7, the other end of resistance R2 connects the pin 6 of power supply VCC and chip IC 2, the other end of resistance R3 connects the other end of electric capacity C3 and electric capacity C4, the other end of electric capacity C3 connects the pin 3 of chip IC 2, the pin 8 of chip IC 2 connects electric capacity C5, the pin 1 of chip IC 2 connects the other end of electric capacity C5, the pin 8 of chip IC 2 connects electric capacity C5 and connects electric capacity C6, the other end of electric capacity C6 connects the other end of speaker B, the model of described chip IC 1 is TA7642, the model of chip IC 2 is LM386.
As preferred version of the present utility model: described power supply VCC is 9V unidirectional current.
Compared with prior art, the beneficial effects of the utility model are: this utility model low-cost wireless broadcast receiver system circuit structure is simple, components and parts are few, by using TA7642 IC chip, eliminate multipole amplifying circuit and detecting circuit, the circuit simplified greatly, and utilize LM386 audio frequency integrated amplifier as audio frequency conversion element, therefore there is the advantage that volume is little, cost of manufacture is low and easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of low-cost wireless broadcast receiver system.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1, a kind of low-cost wireless broadcast receiver system, including antenna A, inductance L1, tunable capacitor C2, chip IC 1 and chip IC 2, one end of described inductance L1 connects resistance R1, tunable capacitor C1 and antenna A, the other end of inductance L1 connects the other end of tunable capacitor C2 and the pin 3 of chip IC 1, the pin 1 of chip IC 1 connects electric capacity C1, electric capacity C4, electric capacity C7, speaker B, the pin 2 of chip IC 2 and the pin 4 of chip IC 2, the pin 2 of chip IC 1 connects the other end of resistance R1, resistance R2, the other end of resistance R3 and electric capacity C7, the other end of resistance R2 connects the pin 6 of power supply VCC and chip IC 2, the other end of resistance R3 connects the other end of electric capacity C3 and electric capacity C4, the other end of electric capacity C3 connects the pin 3 of chip IC 2, the pin 8 of chip IC 2 connects electric capacity C5, the pin 1 of chip IC 2 connects the other end of electric capacity C5, the pin 8 of chip IC 2 connects electric capacity C5 and connects electric capacity C6, the other end of electric capacity C6 connects the other end of speaker B, the model of described chip IC 1 is TA7642, the model of chip IC 2 is LM386.
Power supply VCC is 9V unidirectional current.
Operation principle of the present utility model is: receive the HFBC high frequency broadcasting signal of the many different frequencies come in from antenna A, select by inputting resonant tank, the signal making only that frequency in need could enter TA7642 smoothly, the high-frequency signal transmitted by input circuit is extremely faint, enough amplifications must also be carried out, TA7642 in circuit is a micro integrated circuit, is but integrated with 10 audions inside it, including three grades high put, one-level detection and one-level low frequency Hyblid Buffer Amplifier. Therefore the signal transmitted from input circuit completes signal amplification, detection operation inside TA7642, and the purpose of detection is that the low frequency signal being modulated on high frequency carrier is taken off, and increases stability and the playing quality of signal. Low frequency amplification is carried out finally by audio amplifier circuit, then signal is sent in chip IC 1 and carry out power amplification, make the complete machine output good audio signal of tonequality, the audio signal of 5 foot outputs of chip IC 1 carries out playback on speaker B, and tunable capacitor C2 can regulate the frequency receiving signal easily.
Claims (2)
1. a low-cost wireless broadcast receiver system, including antenna A, inductance L1, tunable capacitor C2, chip IC 1 and chip IC 2, it is characterized in that, one end of described inductance L1 connects resistance R1, tunable capacitor C1 and antenna A, the other end of inductance L1 connects the other end of tunable capacitor C2 and the pin 3 of chip IC 1, the pin 1 of chip IC 1 connects electric capacity C1, electric capacity C4, electric capacity C7, speaker B, the pin 2 of chip IC 2 and the pin 4 of chip IC 2, the pin 2 of chip IC 1 connects the other end of resistance R1, resistance R2, the other end of resistance R3 and electric capacity C7, the other end of resistance R2 connects the pin 6 of power supply VCC and chip IC 2, the other end of resistance R3 connects the other end of electric capacity C3 and electric capacity C4, the other end of electric capacity C3 connects the pin 3 of chip IC 2, the pin 8 of chip IC 2 connects electric capacity C5, the pin 1 of chip IC 2 connects the other end of electric capacity C5, the pin 8 of chip IC 2 connects electric capacity C5 and connects electric capacity C6, the other end of electric capacity C6 connects the other end of speaker B, the model of described chip IC 1 is TA7642, the model of chip IC 2 is LM386.
2. according to a kind of low-cost wireless broadcast receiver system described in claim 1, it is characterised in that described power supply VCC is 9V unidirectional current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107022.4U CN205304822U (en) | 2015-12-28 | 2015-12-28 | Low -cost wireless broadcast receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107022.4U CN205304822U (en) | 2015-12-28 | 2015-12-28 | Low -cost wireless broadcast receiving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304822U true CN205304822U (en) | 2016-06-08 |
Family
ID=56473630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521107022.4U Expired - Fee Related CN205304822U (en) | 2015-12-28 | 2015-12-28 | Low -cost wireless broadcast receiving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304822U (en) |
-
2015
- 2015-12-28 CN CN201521107022.4U patent/CN205304822U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20161228 |