CN209659283U - A kind of circuit for built-in antenna radio - Google Patents
A kind of circuit for built-in antenna radio Download PDFInfo
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- CN209659283U CN209659283U CN201920557307.XU CN201920557307U CN209659283U CN 209659283 U CN209659283 U CN 209659283U CN 201920557307 U CN201920557307 U CN 201920557307U CN 209659283 U CN209659283 U CN 209659283U
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Abstract
The utility model relates to receiver circuit technical fields, refer in particular to a kind of circuit for built-in antenna radio, including FM antenna, AM coil, filter module, radio module, power amplifier module and sounding part SP, the output end of the FM antenna is electrically connected by filter module with the first input end of radio module, the output end of the AM coil is electrically connected with the second input terminal of radio module, the input terminal of the power amplifier module is electrically connected with the output end of radio module, and the output end of the power amplifier module is electrically connected with the input terminal of sounding part SP.The utility model filters off the noise that FM antenna receives by the way that filter module is arranged between FM antenna and radio module, and using filter module, to achieve the effect that the sound quality for improving built-in antenna radio.
Description
Technical field
The utility model relates to receiver circuit technical fields, refer in particular to a kind of electricity for built-in antenna radio
Road.
Background technique
With the development of the society, people's lives level is continuously improved, various electrical equipments occur in succession, in order to more square
Just people's lives can carry out waterproof to each electric appliances, and built-in antenna radio just comes into being.But after built-in antenna,
The reception ability of antenna can be deteriorated, and the sound noise for causing radio to play is excessive.
Summary of the invention
The utility model provides a kind of circuit for built-in antenna radio for problem of the prior art, enables to
Built-in antenna radio has preferable sound quality.
The utility model adopts the following technical solution: a kind of circuit for built-in antenna radio, including FM antenna, AM
Coil, filter module, radio module, power amplifier module and sounding part SP, the output end of the FM antenna by filter module with
The first input end of radio module is electrically connected, and the output end of the AM coil is electrically connected with the second input terminal of radio module, institute
The input terminal for stating power amplifier module is electrically connected with the output end of radio module, and the output end of the power amplifier module is defeated with sounding part SP's
Enter end electrical connection.
Preferably, the filter module includes capacitor C49, capacitor C6, capacitor C5, inductance L2 and inductance L3, FM days
The output end of line is electrically connected after passing sequentially through capacitor C49 and capacitor C5 with the first input end of radio module, one end of inductance L3,
One end of inductance L2 and one end of capacitor C6 are electrically connected with the place of electrical connection of capacitor C49 and capacitor C5, and inductance L3's is another
The other end at end, the other end of inductance L2 and capacitor C6 is grounded.
Preferably, the circuit for built-in antenna radio further includes main control module, the main control module is equipped with
Switch key and main control chip IC4, the switch key are electrically connected with the input terminal of main control chip IC4；The power amplifier module packet
Resistance R11, power tube Q3 and power amplifier chips IC2 are included, main control chip IC4 is electrically connected with the control terminal of power tube Q3, power tube
The feeder ear at the first switch end of Q3, one end of resistance R11 and power amplifier chips IC2 is connect with external power supply, power tube Q3
Second switch end and the other end of resistance R11 be grounded.
Preferably, the circuit for built-in antenna radio further includes display part LCD, the main control chip IC4
For communicating to connect with radio module, the display part LCD is for showing the letter that main control chip IC4 is received from radio module
Number.
Preferably, the circuit for built-in antenna radio further includes power module, the power module includes
Voltage stabilizing chip IC3, external power supply are powered by voltage stabilizing chip IC3 to radio module.
Preferably, the power module further includes triode Q5, main control chip IC4 and the control terminal of triode Q5 are electrically connected
It connects, the first switch end of triode Q5 is connect with the feeder ear of radio module, the second switch end of triode Q5 and pressure stabilizing core
The output end of piece IC3 is electrically connected.
Preferably, the power module further includes capacitor C22, the second switch of the anode and triode Q5 of capacitor C22
End electrical connection, the cathode ground connection of capacitor C22.
Preferably, the power module further includes indicator light LED1 and triode Q6, main control chip IC4 and triode Q6
Control terminal electrical connection, the anode of indicator light LED1 is electrically connected with the output end of voltage stabilizing chip IC3, the cathode of indicator light LED1 and
The first switch end of triode Q6 is electrically connected, the second switch end ground connection of triode Q6.
The utility model has the beneficial effects that by the way that filter module is arranged between FM antenna and radio module, and utilize filtering
Module filters off the noise that FM antenna receives, to achieve the effect that the sound quality for improving built-in antenna radio.
Detailed description of the invention
Fig. 1 be the FM antenna of the utility model, AM coil, filter module radio module and power amplifier module circuit diagram.
Fig. 2 is the circuit diagram of the main control module of the utility model, switch key and power module.
Fig. 3 is the circuit diagram of the display part LCD of the utility model.
Appended drawing reference are as follows: 1, FM antenna；2, AM coil；3, filter module；4, radio module；5, power amplifier module；6, master control
Module；7, power module；8, switch key.
Specific embodiment
For the ease of the understanding of those skilled in the art, the utility model is made below with reference to embodiment and attached drawing further
Explanation, the content that embodiment refers to not is restriction to the utility model.The utility model is carried out below in conjunction with attached drawing
Detailed description.
As shown in Figure 1, a kind of circuit for built-in antenna radio, including FM antenna 1, AM coil 2, filter module 3,
The output end of radio module 4, power amplifier module 5 and sounding part SP, the FM antenna 1 pass through filter module 3 and radio module 4
First input end electrical connection, the output end of the AM coil 2 are electrically connected with the second input terminal of radio module 4, the power amplifier mould
The input terminal of block 5 is electrically connected with the output end of radio module 4, the output end of the power amplifier module 5 and the input terminal of sounding part SP
Electrical connection.
1 model KT0913L of chip IC used in radio module 4.The utility model passes through in FM antenna 1 and radio reception mould
Filter module 3 is set between block 4, and filters off the noise that FM antenna 1 receives using filter module 3, to reach the built-in day of raising
The effect of the sound quality of line radio.The utility model is additionally provided with AM coil 2 to receive AM signal, so that user can listen to FM
Signal, and AM signal can be listened to.
As shown in Figure 1, the filter module 3 includes capacitor C49, capacitor C6, capacitor C5, inductance L2 and inductance L3, FM
The output end of antenna 1 is electrically connected after passing sequentially through capacitor C49 and capacitor C5 with the first input end of radio module 4, inductance L3's
One end of one end, one end of inductance L2 and capacitor C6 is electrically connected with the place of electrical connection of capacitor C49 and capacitor C5, inductance L3's
The other end of the other end, the other end of inductance L2 and capacitor C6 is grounded.Pass through capacitor C49, capacitor C6, capacitor C5, inductance
L2 and inductance L3 reduces the burr for the signal that FM antenna 1 receives, so that signal is smoother, and radio is possessed preferably
Sound quality.
As depicted in figs. 1 and 2, the circuit for built-in antenna radio further includes main control module 6, the master control mould
Block 6 is equipped with switch key 8 and main control chip IC4, the switch key 8 are electrically connected with the input terminal of main control chip IC4；The function
Amplification module 5 includes resistance R11, power tube Q3 and power amplifier chips IC2, and main control chip IC4 and the control terminal of power tube Q3 are electrically connected
It connecing, the feeder ear at the first switch end of power tube Q3, one end of resistance R11 and power amplifier chips IC2 is connect with external power supply,
The second switch end of power tube Q3 and the other end of resistance R11 are grounded.User can control function by switch key 8
The switch of chip IC 2 is put, to realize the control to the switch of the utility model.Specifically, power amplifier chips IC2 model
SC8002, main control chip IC4 model EDI3115.
As shown in figure 3, the circuit for built-in antenna radio further includes display part LCD, the main control chip IC4
For communicating to connect with radio module 4, the display part LCD is for showing the letter that main control chip IC4 is received from radio module 4
Number, check existing which radio station just listening to be convenient for user.
As depicted in figs. 1 and 2, the circuit for built-in antenna radio further includes power module 7, the power supply mould
Block 7 includes voltage stabilizing chip IC3, and external power supply is powered by voltage stabilizing chip IC3 to radio module 4, enables radio module 4 steady
Determine by electricity and steadily runs.Voltage stabilizing chip IC3 model is specially CYT6206.
As depicted in figs. 1 and 2, the power module 7 further includes triode Q5, the control of main control chip IC4 and triode Q5
End electrical connection processed, the first switch end of triode Q5 are connect with the feeder ear of radio module 4, the second switch end of triode Q5
It is electrically connected with the output end of voltage stabilizing chip IC3.Also it can control the electric power thus supplied of radio module 4 when user presses switch key 8,
Power amplifier chips IC2 and radio module 4 are synergistically opened and closed.
As shown in Fig. 2, the power module 7 further includes capacitor C22, the anode of capacitor C22 is opened with the second of triode Q5
Guan Duan electrical connection, the cathode ground connection of capacitor C22.When external power supply works, capacitor C22 charging, after external power supply power-off, capacitor
The of short duration electric discharge of C22 powers for radio module 4 and main control chip IC4 so that radio module 4 and main control chip IC4 having time into
Row caching.
As shown in Fig. 2, the power module 7 further includes indicator light LED1 and triode Q6, main control chip IC4 and triode
The control terminal of Q6 is electrically connected, and the anode of indicator light LED1 is electrically connected with the output end of voltage stabilizing chip IC3, the cathode of indicator light LED1
It is electrically connected with the first switch end of triode Q6, the second switch end ground connection of triode Q6, indicator light LED1 can indicate power supply
Situation.
The above is only the utility model preferred embodiment, is not made in any form to the utility model
Limitation, although the utility model is disclosed as above with preferred embodiment, is not intended to limit the utility model, any to be familiar with sheet
Technical professional is not departing within the scope of technical solutions of the utility model, makes when using the technology contents of the disclosure above
A little change or the equivalent embodiment for being modified to equivalent variations, but it is all without departing from the content of the technical scheme of the utility model, foundation
The utility model technology refers to any simple modification, equivalent change and modification to the above embodiments, belongs to practical
In the range of new technique scheme.
Claims (8)
1. a kind of circuit for built-in antenna radio, it is characterised in that: including FM antenna (1), AM coil (2), filtering mould
Block (3), radio module (4), power amplifier module (5) and sounding part SP, the output end of the FM antenna (1) pass through filter module
(3) it is electrically connected with the first input end of radio module (4), the second of the output end of the AM coil (2) and radio module (4) is defeated
Enter end electrical connection, the input terminal of the power amplifier module (5) is electrically connected with the output end of radio module (4), the power amplifier module (5)
Output end be electrically connected with the input terminal of sounding part SP.
2. a kind of circuit for built-in antenna radio according to claim 1, it is characterised in that: the filter module
It (3) include that the output end of capacitor C49, capacitor C6, capacitor C5, inductance L2 and inductance L3, FM antenna (1) passes sequentially through capacitor
It is electrically connected after C49 and capacitor C5 with the first input end of radio module (4), one end of inductance L3, one end of inductance L2 and electricity
The one end for holding C6 is electrically connected with the place of electrical connection of capacitor C49 and capacitor C5, the other end of inductance L3, inductance L2 the other end with
And the other end of capacitor C6 is grounded.
3. a kind of circuit for built-in antenna radio according to claim 1, it is characterised in that: described for built-in
The circuit of antenna radio further includes main control module (6), and the main control module (6) is equipped with switch key (8) and main control chip
IC4, the switch key (8) are electrically connected with the input terminal of main control chip IC4；
The power amplifier module (5) includes resistance R11, power tube Q3 and power amplifier chips IC2, main control chip IC4 and power tube Q3
Control terminal electrical connection, the feeder ear at the first switch end of power tube Q3, one end of resistance R11 and power amplifier chips IC2 with
External power supply connection, the second switch end of power tube Q3 and the other end of resistance R11 are grounded.
4. a kind of circuit for built-in antenna radio according to claim 3, it is characterised in that: described for built-in
The circuit of antenna radio further includes display part LCD, and the main control chip IC4 is used to communicate to connect with radio module (4), described
Display part LCD is for showing the signal that main control chip IC4 is received from radio module (4).
5. a kind of circuit for built-in antenna radio according to claim 3, it is characterised in that: described for built-in
The circuit of antenna radio further includes power module (7), and the power module (7) includes voltage stabilizing chip IC3, and external power supply passes through
Voltage stabilizing chip IC3 powers to radio module (4).
6. a kind of circuit for built-in antenna radio according to claim 5, it is characterised in that: the power module
It (7) further include triode Q5, main control chip IC4 is electrically connected with the control terminal of triode Q5, the first switch end of triode Q5
It is connect with the feeder ear of radio module (4), the second switch end of triode Q5 is electrically connected with the output end of voltage stabilizing chip IC3.
7. a kind of circuit for built-in antenna radio according to claim 6, it is characterised in that: the power module
It (7) further include capacitor C22, the anode of capacitor C22 is electrically connected with the second switch end of triode Q5, the cathode ground connection of capacitor C22.
8. a kind of circuit for built-in antenna radio according to claim 5, it is characterised in that: the power module
It (7) further include indicator light LED1 and triode Q6, main control chip IC4 is electrically connected with the control terminal of triode Q6, indicator light LED1
Anode be electrically connected with the output end of voltage stabilizing chip IC3, the cathode of indicator light LED1 is electrically connected with the first switch end of triode Q6
It connects, the second switch end ground connection of triode Q6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920557307.XU CN209659283U (en) | 2019-04-22 | 2019-04-22 | A kind of circuit for built-in antenna radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920557307.XU CN209659283U (en) | 2019-04-22 | 2019-04-22 | A kind of circuit for built-in antenna radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209659283U true CN209659283U (en) | 2019-11-19 |
Family
ID=68529540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920557307.XU Active CN209659283U (en) | 2019-04-22 | 2019-04-22 | A kind of circuit for built-in antenna radio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209659283U (en) |
-
2019
- 2019-04-22 CN CN201920557307.XU patent/CN209659283U/en active Active
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