CN206948298U - A kind of radio - Google Patents

Abstract

The utility model discloses a radio, which comprises a power supply module for supplying power to the whole device, a radio module, a core processing module, a power amplifier and a sound module, and an extension for externally connecting a Bluetooth module or a Wi-Fi module or a 3G/4G module interface, the power supply module is respectively connected with the radio module, the core processing module, the power amplifier module, and the expansion interface, and the core processing module is also connected with the radio module, the power amplifier module, and the expansion interface respectively. The expansion interface and the radio module are also connected with the power amplifier module. The radio of the utility model has an expansion interface, which can be externally connected to a Wi-Fi module or a 3G/4G module, and can also be externally connected to a Bluetooth module. When the Wi-Fi module or a 3G/4G module is externally connected, the radio can be expanded into a network radio; When an external Bluetooth module is connected, the radio can be combined with a Bluetooth speaker to produce sound. In short, the configuration of this radio is flexible, the cost is low, and the user experience is improved.

Description

a radio

technical field

The utility model relates to the field of audio systems, in particular to a radio.

Background technique

A radio is a small radio receiver. It is mainly used to receive radio broadcast programs and listen to radio transmitters, usually entertainment and information programs sent by radio stations. With the vigorous development of the Internet, listening to radio stations on the Internet is no longer limited to listening to old-fashioned radios.

There are two types of Internet radio. One is a software running on a computer or mobile smart device, which can listen to various Internet radio stations on the Internet. Such as Dragonfly FM, AnyRadio Internet radio and so on. The birth of mobile Internet radio software has brought good news to mobile phone users who did not provide radio modules. Through them, they can simultaneously listen to the same content as ordinary FM radio programs online, but this kind of radio lacks the experience of traditional radio. The other is the need for hardware FM support, which is an extension of the traditional radio. It can be connected to the Internet network through wired or wireless, and listen to the Internet stations on the network. You don’t need to use the Internet radio software on the computer to listen, but this kind of Things need to be purchased separately, which is less cost-effective.

On the other hand, existing radios are only suitable for playing low-frequency audio, and the effect is not good enough if full-frequency files are to be played. On the other hand, when the existing radio is playing full-frequency music, the playback effect of the bass part is not ideal enough, so it can be considered to make full use of the radio and the subwoofer to form a combined sound box, combine the two, and use the subwoofer to play the bass part. The radio plays the middle and high range.

Utility model content

The technical problem to be solved by the utility model is to provide a radio for the above-mentioned defects of the prior art.

The technical solution adopted by the utility model to solve the technical problems is: to construct a radio, including a power supply module for supplying power to the whole device, a radio module, a core processing module, a power amplifier module, and an external Bluetooth module or Wi- The expansion interface of the Fi module or 3G/4G module, the power module is connected with the radio module, the core processing module, the power amplifier sound module and the expansion interface respectively, and the core processing module is also connected with the radio module and the power amplifier respectively The sound module and the expansion interface are connected, and the expansion interface and the sound receiving module are also connected with the power amplifier sound module.

Preferably, the expansion interface is a female socket, and the Bluetooth module or Wi-Fi module or 3G/4G module has a male socket matching the expansion interface.

Preferably, the expansion interfaces are respectively 12pin USB sockets.

Preferably, the power amplifier sound playback module includes an earphone power amplifier sound playback module and a speaker power amplifier sound playback module, and the speaker power amplifier sound playback module includes a power amplifier switch circuit, a power amplifier power supply circuit, and a power amplifier sound playback circuit. The power amplifier switch circuit, The power amplifier power circuit and the power amplifier sound circuit are connected in sequence.

Preferably, the core processing module includes an MCU unit and respectively connected to the MCU unit: a Bluetooth module and an audio digital-to-analog conversion module, and the audio digital-to-analog conversion module is connected between the expansion interface and the power amplifier circuit.

Among them, pin 1 and pin 6 of the USB female base are grounding pins, pins 11 and 12 are 5V power supply pins, pins 1, 6, 11 and 12 are connected to the power module; pin 2 is the POP sound mute pin, which is connected to the power amplifier Playback module; pin 3 is the external module enable detection pin, connected to the MCU unit; pin 4 is the mode detection pin, connected to the MCU unit; pin 5 is the core audio output pin, connected to the amplifier module; pin 7 is the digital audio master Clock pin, pin 8 is a digital audio frame clock pin; pin 9 is a digital audio bit clock pin, pin 10 is a digital audio data pin, and pins 7, 8, 9, and 10 are connected to the audio digital-to-analog conversion module.

Preferably, the bluetooth module includes a bluetooth chip and its peripheral circuit, a bluetooth power-on circuit, a memory chip, and a bluetooth power supply circuit, the memory chip and the bluetooth power-on circuit are respectively connected to the bluetooth chip, and the bluetooth power-on circuit is also connected to the The bluetooth power supply circuit and the MCU unit are connected respectively.

Wherein, the core processing module further includes: an FM frequency selection unit, an LED indicator unit, and a function status indicating unit respectively connected to the MCU unit.

Implementing the radio of the utility model has the following beneficial effects: the radio of the utility model has an expansion interface, which can be externally connected to a Wi-Fi module or a 3G/4G module, and can be externally connected to a Bluetooth module. When the 4G module is used, the radio can be expanded to an Internet radio; when an external Bluetooth module is connected, the radio can be combined with a Bluetooth speaker to produce sound. In short, the radio configuration is flexible and the cost is low, and the user experience is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without paying creative work:

Fig. 1 is a block diagram of a preferred embodiment of the utility model;

Fig. 2 is a schematic structural view of the interface connected between the interface board and the main board of the preferred embodiment;

Fig. 3 is a schematic structural diagram of a power module of a preferred embodiment;

Fig. 4 is the structural representation of the radio module of preferred embodiment;

Fig. 5 is a schematic structural diagram of an expansion interface of a preferred embodiment;

Fig. 6 is a schematic structural diagram of a functional state indicating unit of a preferred embodiment;

Fig. 7 is the structural representation of the earphone power amplifier sound playback module of preferred embodiment;

Fig. 8 is the circuit diagram of the MCU unit of preferred embodiment;

Fig. 9 is the circuit diagram of bluetooth chip and peripheral circuit thereof of preferred embodiment;

Fig. 10 is a circuit diagram of a memory chip of a preferred embodiment;

Fig. 11 is a circuit diagram of the bluetooth power-on circuit of a preferred embodiment;

Fig. 12 is the circuit diagram of the bluetooth power supply circuit of preferred embodiment;

Fig. 13 is a circuit diagram of the audio digital-to-analog conversion module of a preferred embodiment;

Fig. 14 is the circuit diagram of the FM frequency selection unit of preferred embodiment;

Fig. 15 is a circuit diagram of the LED indicator unit of the preferred embodiment;

Fig. 16 is the circuit diagram of the power amplifier switch circuit of preferred embodiment;

Fig. 17 is the circuit diagram of the power amplifier power circuit of preferred embodiment;

Fig. 18 is a circuit diagram of a sound playing circuit of a power amplifier in a preferred embodiment.

detailed description

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Typical embodiments of the utility model are provided in the accompanying drawings. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that the words "connected" or "connected" or other similar terms include not only connecting two entities directly, but also indirectly connecting two entities through other entities that have a beneficial improvement effect.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model.

Referring to Fig. 1, the general thought of the utility model is: design a kind of radio, it comprises the power supply module for supplying power to the whole device, radio module, core processing module, power amplifier sound module, for external bluetooth module or Wi-Fi Module or the expansion interface of the 3G/4G module, the power supply module is connected with the radio module, the core processing module, the power amplifier sound module, and the expansion interface respectively, and the core processing module is also connected with the radio module and the power amplifier sound module respectively The module and the expansion interface are connected, and the expansion interface and the radio module are also connected with the power amplifier sound module.

The radio of the utility model has an expansion interface, which can be externally connected to a Wi-Fi module or an external Bluetooth module. When the Wi-Fi module is externally connected, the radio can be expanded into an Internet radio; when the Bluetooth module is externally connected, the radio can be connected to the Bluetooth speaker Combination sound, in short, the configuration of this radio is flexible, the cost is low, and the user experience is improved.

In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the utility model and the specific features in the embodiments are detailed descriptions of the technical solution of the application. description, rather than limitation to the technical solution of the present application, and the embodiments of the present utility model and the technical features in the embodiments can be combined with each other under the condition of no conflict.

In a preferred embodiment, the power amplifier sound module includes an earphone power amplifier sound module and a loudspeaker power amplifier sound module, and the core processing module includes an MCU unit and is connected with the MCU unit respectively: a bluetooth module, an audio digital-to-analog conversion module, FM frequency selection unit, LED indicator unit, function status indication unit.

In this embodiment, all circuits are arranged on two boards, one is an interface board and the other is a main board. Specifically, the circuits shown in FIGS. 2-7 are set on the interface board, and the circuits shown in FIGS. 8-18 are set on the main board. Of course, it can be understood that the specific number of circuit boards is not limited thereto, and the circuit of the present invention can be arranged on any number of circuit boards, and the preferred embodiment is only an illustration. Specifically, referring to FIG. 2 , in a preferred embodiment, the interface board and the main board are connected through two pairs of interfaces. In the figure, interfaces con1 and con5 are interfaces on the main board side, and con3 and con4 are interfaces on the interface board side. Con1 is connected to con3, which is mainly responsible for audio signal input and output. The connection between con4 and con5 is mainly responsible for the transmission of related signals such as power supply, status control, and LED connection status.

The circuits on the interface board and the main board are introduced separately below.

Refer to Figure 3, the power module setting and the interface board, which includes the battery interface of the 7.4V battery, a chip U4 of the type IC_TSSOP20_ANT2801 for charging management of the 7.4V battery, LED7 is used for charging status indication, charging is red, fully charged is green. In this embodiment, the battery also has an NTC detection and protection circuit, and the detection voltage of the NTC detection and protection circuit is supplied to the chip U4 through pin 2 of the interface BAT1. Referring to Fig. 4, the radio module setting and the interface board include a chip IC2 of the type MKR2002 for receiving FM radio stations, and its power supply is controlled by the switch tube Q3.

Referring to Fig. 5-6, the expansion interface and the function status indicating unit are also arranged on the interface board. In Figure 5, USB3 represents the expansion interface, which is a 12pin USB female socket, and the external Bluetooth module or Wi-Fi module or 3G/4G module has a 12pin USB male socket that matches USB3. In Figure 5, USB1 is a MICOR USB interface, which can be connected to an external 5V power supply to charge the internal battery and also be used as an AUX external audio input. 106 in FIG. 6 represents a functional state indicating unit, which includes three kinds of indicator lights, white for Bluetooth, green for radio, and orange for AUX.

Specifically, USB3 has 12 pins, and the specific definition of 12 pins is: 1 pin is the ground pin; 2 pins are the MUTE pin (also a reserved communication pin), which is used to mute the POP impact sound from the external module ;Pin 3 is the pin for transmitting the switch signal of the external Wi-Fi module or 3G/4G module or Bluetooth module; pin 4 is the mode detection pin; pin 5 is the core audio output pin; pin 6 is the ground connection pin ; Pin 7 is I2S digital audio MCLK; pin 8 is I2S digital audio LRCLK; pin 9 is I2S digital audio CLK; pin 10 is I2S digital audio DATA; pins 11 and 12 are 5V power supply.

Among them, pin 4 is at low level when the radio is in FM (frequency modulation) and BT (Bluetooth) mode, and the external Wi-Fi module or 3G/4G module enters the standby state. When the AUX interface of the radio is not plugged in, pin 4 is high level, and the external Wi-Fi module or 3G/4G module is on. When the AUX signal line is plugged in, pin 4 is at low level, and the external Wi-Fi module or 3G/4G module is also in standby mode. In the external Wi-Fi module or 3G/4G module, the fourth pin will be tested for the IO port, and in the external Bluetooth module, this pin will not be tested.

Referring to Figure 7, the headphone power amplifier module is set on the interface board, which includes a voltage regulator chip IC3 of model XC6209 and a drive circuit composed of resistors R7, R8, R45, R46 and switch chip IC1 of model 4866. In the figure, PH1 is the headphone jack and also the FM external antenna jack.

Referring to FIG. 8 , the MCU unit is arranged on the main board, and the chip U5 specifically adopted in the preferred embodiment is a model of MC32P7311. Referring to Figure 9-12, the Bluetooth module is set on the main board. The bluetooth module includes a bluetooth chip and its peripheral circuits, a bluetooth boot circuit 1021 , a memory chip, and a bluetooth power supply circuit 1022 . As shown in Figure 9-10, UZ1 is the Bluetooth chip, and IC4 is the memory chip. As shown in FIG. 11 , the Bluetooth power-on circuit 1021 includes a voltage regulator chip IC3 whose model is HM7550H.

Referring to FIG. 13 , the audio digital-to-analog conversion module is set on the motherboard, which includes a DAC chip U1 whose model is IC-TSSOP10-CS4344. Referring to Figures 14-15, 105 in Figure 15 represents an LED indicator unit, which is used to indicate that the whole machine is in a working state. 104 in FIG. 14 represents an FM frequency selection unit, which adopts an FM potentiometer.

Referring to Figures 16-18, specifically, the speaker power amplifier sound playback module includes a power amplifier switch circuit 201, a power amplifier power supply circuit 202, and a power amplifier sound playback circuit 203, and the power amplifier switch circuit 201, power amplifier power supply circuit 202, and power amplifier sound playback circuit 203 are connected in sequence . Referring to FIG. 16 , the power amplifier switching circuit 201 includes switching tubes Q11 and Q12 . Referring to FIG. 17 , the power amplifier power supply circuit 202 includes an operational amplifier JRC4558. Referring to Fig. 18, the two-stage drive amplification composed of operational amplifiers U6-A and U6-B in the power amplifier circuit 203, VR1 in the figure is mainly for volume control, and U2 in the figure is TK0338, which is a fixed 24 times gain With anti-breaking sound AB class D switching monophonic audio power amplifier, Bluetooth works in D class mode, when the battery voltage is lower than 7.4V, the power amplifier voltage will be stable at 7.4V, so that more power can be obtained when the battery is low, FM works in the AB class mode, and the AB class does not need a boost, so that the radio effect is better.

It can be understood that the selection of components, chips and their models in the preferred implementation is only to illustrate the utility model, not to limit the utility model, and the replacement of other components with similar functions belongs to this embodiment Without departing from the thinking of the present utility model, these simple deformations all fall within the scope of protection of the present utility model.

The working principle of the utility model is briefly described as follows: the 12pin USB female seat provides the audio input and output channels of the radio. For example, if the 12pin USB socket is connected to an external Wi-Fi module or 3G/4G module, the radio can be expanded into an Internet radio, receiving digital audio signals through the external Wi-Fi module or 3G/4G module, and the received digital audio The signal is sent to the audio digital-to-analog conversion module through the 12pin USB socket for processing, and finally played through the power amplifier circuit. For another example, if the 12pin USB socket is connected to an external Bluetooth module, the radio can be combined with a Bluetooth speaker or another radio with an external Bluetooth module to produce sound. For example, the audio data of the Bluetooth speaker is sent to the external Bluetooth module of the radio through Bluetooth, and then through The 12pin USB female socket inputs the internal circuit of the radio, or the internal circuit of the radio outputs the audio signal to the external Bluetooth module through the 12pin USB female socket, and then sends it to the Bluetooth speaker through the Bluetooth module.

It should be noted that the algorithms involved in the coding and processing of data involved in the working process are common knowledge in the field of Internet radio, so the utility model does not depend on the improvement of the algorithm.

In summary, implementing the radio of the present utility model has the following beneficial effects: implementing the radio of the present utility model has the following beneficial effects: the radio of the present utility model has an expansion interface, which can be externally connected to a Wi-Fi module or 3G/4G module, and an external Bluetooth module. When an external Wi-Fi module or 3G/4G module is connected, the radio can be expanded into an Internet radio; when an external Bluetooth module is connected, the radio can be combined with a Bluetooth speaker to produce sound. In short, this radio configuration is flexible and low cost , User experience is improved.

Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.

Claims (9)

1. a kind of radio, it is characterised in that at the power module for being powered to whole device, radio module, core Manage module, power amplifier playback module, for the external bluetooth module either expansion interface of Wi-Fi module or 3G/4G modules, it is described Power module is connected with the radio module, core processing module, power amplifier playback module, expansion interface respectively, at the core Reason module is also connected with the radio module, power amplifier playback module, expansion interface respectively, and the expansion interface, radio module are also It is connected with power amplifier playback module.

2. radio according to claim 1, it is characterised in that the expansion interface is female seat, the bluetooth module or Person's Wi-Fi module or 3G/4G modules have the male seat to match with the expansion interface.

3. radio according to claim 2, it is characterised in that described to expand the USB female seats that interface is respectively 12pin.

4. radio according to claim 3, it is characterised in that the core processing module includes MCU units, bluetooth mould Block and audio D/A modular converter；

Wherein, 1 pin of USB female seats, 6 pin are grounding leg, and 11 pin, 12 pin are 5V supply pins, and 1 pin, 6 pin, 11 pin, 12 pin are connected to Power module；2 pin are the Jing Yin pin of POP sound, connect power amplifier playback module；3 pin are the enabled detection pin of external module, and connection MCU is mono- Member；4 pin are mode detection pin, connect MCU units；5 pin are kernel audio output pin, connect power amplifier playback module；7 pin are numeral Audio master clock pin, 8 pin are digital audio frames clock pins；9 pin are DAB bit clock pin, and 10 pin are digital audio-frequency data Pin, 7 pin, 8 pin, 9 pin, 10 pin are connected to audio D/A modular converter.

5. radio according to claim 1, it is characterised in that the power amplifier playback module includes earphone power amplifier playback mould Block and loudspeaker power amplifier playback module.

6. radio according to claim 5, it is characterised in that the loudspeaker power amplifier playback module is opened including power amplifier Powered-down road, amplifier power supply circuit, power amplifier playback circuit, the power discharging switch circuit, amplifier power supply circuit, power amplifier playback circuit according to Secondary connection.

7. radio according to claim 6, it is characterised in that the core processing module includes MCU units and divided It is not connected with the MCU units：Bluetooth module and audio D/A modular converter, the audio D/A modular converter, which is connected to, to be opened up Open up between interface and power amplifier playback circuit (203).

8. radio according to claim 7, it is characterised in that the bluetooth module includes Bluetooth chip and its periphery electricity Road, bluetooth boot-strap circuit (1021), storage chip, bluetooth power circuit (1022), the storage chip, bluetooth boot-strap circuit (1021) be connected respectively with the Bluetooth chip, the bluetooth boot-strap circuit (1021) also with the bluetooth power circuit (1022), MCU units connect respectively.

9. radio according to claim 8, it is characterised in that the core processing module also includes mono- with MCU respectively Member connection：FM frequency-selectings unit (104), LED light unit (105), functional status indicating member (106).