CN203340236U - wireless audio/video and data communication device - Google Patents
wireless audio/video and data communication device Download PDFInfo
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- CN203340236U CN203340236U CN2013203656761U CN201320365676U CN203340236U CN 203340236 U CN203340236 U CN 203340236U CN 2013203656761 U CN2013203656761 U CN 2013203656761U CN 201320365676 U CN201320365676 U CN 201320365676U CN 203340236 U CN203340236 U CN 203340236U
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Abstract
A wireless audio/video and data communication device comprises a main control circuit, a USB interface and a voltage conversion circuit, wherein the USB interface is connected with the main control circuit and used for receiving audio signals and video signals, the voltage conversion circuit is externally connected with a FLASH and EEPROM enabling circuit, the USB interface and the voltage conversion circuit are connected with each other, the main control circuit is further connected with signal input/output ends of a first filter circuit, a second filter circuit, a third filter circuit and a fourth filter circuit respectively, the signal output/input ends of the first filter circuit and the second filter circuit are connected with a first antenna through a first duplex circuit, and the signal output/input ends of the third filter circuit and the fourth filter circuit are connected with a second antenna through a second duplex circuit. The utility model discloses the circuit is simple, and low cost has not only solved the problem that traditional analog circuit structure differentiation is complicated, discrete components and parts are many, manufacturing cost is high, has greatly improved the technical parameter and the stability of product moreover.
Description
Technical field
The utility model relates to a kind of wireless audio and video and data communication apparatus.The wireless audio and video and the data communication apparatus that particularly relate to a kind of audio and video frequency signal wireless sharing of Digital Television.
Background technology
Digital Television has spread to huge numbers of families, and becomes the essential project of must lying fallow of each family.The Digital Television of access family be all wired mode, and every Set Top Box all can only access a TV to signal, if this just causes the one family to want to see, differently must will cause puzzlement by channels, and wiring can cause the house interior trim in disorder, raises the cost.
For overcoming the above problems, set up sharing of digital television signal, can realize (full name of WiFi is Wireless Fidelity, adopting wireless fidelity technology) by existing ripe WI-FI technology.But along with the universal and living standard of various appliance applications in family improves family's interior wall, increase, to the electromagnetic interference of WI-FI signal with intercept and increase, the WI-FI signal can be weakened layer by layer when arriving receiving terminal, causes signal quality to reduce.
Along with the electronic users such as PC, smart mobile phone and the iPad of Apple panel computer must increase, sharing of digital television signal will become a kind of trend.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of and vision signal and audio signal can be realized to wireless audio and video and the data communication apparatus of LAN-sharing by radiofrequency launcher.
The technical scheme that the utility model adopts is: a kind of wireless audio and video and data communication apparatus, the voltage conversion circuit that comprises main control circuit and the USB interface for received audio signal and vision signal be connected with main control circuit respectively and external FLASH and EEPROM enable circuits, described USB interface and voltage conversion circuit interconnect, described main control circuit also connects respectively the first filter circuit, the second filter circuit, the signal I/O end of the 3rd filter circuit and the 4th filter circuit, the signal input/output end of described the first filter circuit and the second filter circuit is connected the first antenna by the first duplicate circuitry, the signal input/output end of described the 3rd filter circuit and the 4th filter circuit is connected the second antenna by the second duplicate circuitry.
Described the first filter circuit is the 2.4G signal filter circuit, include capacitor C 24 and capacitor C 25, one end of described capacitor C 24 connects an end of main control circuit and capacitor C 26, one end of described capacitor C 25 connects the other end of main control circuit and capacitor C 26, the other end of described capacitor C 24 connects respectively capacitor C 23, one end of capacitor C 20 and inductance L 6, the other end of described capacitor C 25 connects respectively the other end of capacitor C 23 and an end of capacitor C 21 and inductance L 5, the other end ground connection of described capacitor C 20 and inductance L 5, the other end of described inductance L 6 and capacitor C 21 is connected respectively capacitor C 16, inductance L 3 and capacitor C 14, the other end ground connection of described capacitor C 16, the other end of inductance L 3 and capacitor C 14 is respectively by capacitor C 13 ground connection and connect the first duplicate circuitry by capacitor C 11.
Described the second filter circuit is the 5G signal filter circuit, include the capacitor C 38 and the inductance L 15 that connect respectively main control circuit, the other end ground connection of described capacitor C 38, the other end of inductance L 15 connects respectively capacitor C 43 and the second duplicate circuitry, the other end ground connection of described capacitor C 43.
Described the 3rd filter circuit is the 2.4G signal filter circuit, include capacitor C 35 and capacitor C 34, one end of described capacitor C 35 connects an end of main control circuit and capacitor C 33, one end of described capacitor C 34 connects the other end of main control circuit and capacitor C 33, the other end of described capacitor C 35 connects respectively capacitor C 37, one end of capacitor C 40 and inductance L 14, the other end of described capacitor C 34 connects respectively the other end of capacitor C 37 and an end of capacitor C 39 and inductance L 13, the other end ground connection of described capacitor C 40 and inductance L 13, the other end of described inductance L 14 and capacitor C 39 is connected respectively capacitor C 42, inductance L 16 and capacitor C 45, the other end ground connection of described capacitor C 42, the other end of inductance L 16 and capacitor C 45 is respectively by capacitor C 46 ground connection and connect the second duplicate circuitry by capacitor C 47.
Described the 4th filter circuit is the 5G signal filter circuit, include the capacitor C 22 and the inductance L 4 that connect respectively main control circuit, the other end ground connection of described capacitor C 22, the other end of inductance L 4 connects respectively capacitor C 17 and the first duplicate circuitry, the other end ground connection of described capacitor C 17.
Described the first duplicate circuitry includes antenna socket E1, detects connector U8 and two merit device U1, wherein, the pin 1 of described antenna socket E1 is by capacitor C 3 ground connection, pin 2 is connected by inductance L 1 pin 3 that detects connector U8 successively with capacitor C 72, the two ends of described inductance L 1 are also respectively by a capacitor C 4/C5 ground connection, detect pin 6, pin 4, pin 2 and pin 5 ground connection of connector U8, pin 1 connects the pin 5 of two merit device U1, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the second filter circuit by a capacitor C 2, and pin 3 connects the first filter circuit.
Described the second duplicate circuitry includes antenna socket E2, detects connector U9 and two merit device U2, wherein, the pin 1 of described antenna socket E2 is by capacitor C 8 ground connection, pin 2 is connected by inductance L 2 pin 3 that detects connector U9 successively with capacitor C 73, the two ends of described inductance L 2 are also respectively by a capacitor C 9/C10 ground connection, detect pin 6, pin 4, pin 2 and pin 5 ground connection of connector U9, pin 1 connects the pin 5 of two merit device U2, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the 4th filter circuit by a capacitor C 7, and pin 3 connects the 3rd filter circuit.
Wireless audio and video of the present utility model and data communication apparatus, adopt Digital Signal Processing to realize that all circuit of transmitting-receiving path are integrated in a slice chip, only needs few peripheral components can complete the radio-frequency receiving-transmitting function, and circuit is simple, with low cost; And adopt the Double RF antenna, increase signal strength signal intensity and stability.This module has not only solved the problem that the conventional analog circuits structure differentiation is complicated, discrete component is many, production cost is high, and has greatly improved technical parameter and the stability of product.The utility model internal firmware is through optimizing, drive as the specific aim programming, the compatibility coupling that Domestic set top box is there is to height, can better to data, be processed, transmission speed is more stable sooner, picture reaches the effect of high-fidelity fully with tonequality, can realize that electronic equipment is to the undistorted acceptance of digital television signal.
The accompanying drawing explanation
Fig. 1 is formation block diagram of the present utility model;
Fig. 2 is the schematic diagram of main control chip in main control circuit of the present utility model;
Fig. 3 is the external crystal oscillating circuit schematic diagram of main control circuit;
Fig. 4 is the external FLASH of main control circuit and EEPROM enable circuits schematic diagram;
Fig. 5 is the mode selection circuit schematic diagram of main control circuit;
Fig. 6 is the display circuit schematic diagram;
Fig. 7 is the first duplicate circuitry schematic diagram;
Fig. 8 is the second duplicate circuitry schematic diagram;
Fig. 9 is the eeprom circuit schematic diagram;
Figure 10 a is the first filter circuit schematic diagram;
Figure 10 b is the 3rd filter circuit schematic diagram;
Figure 11 a is the 4th filter circuit schematic diagram;
Figure 11 b is the second filter circuit schematic diagram;
Figure 12 is the electric source filter circuit schematic diagram that connects voltage conversion circuit;
Figure 13 is the electric source filter circuit schematic diagram that connects main control circuit;
Figure 14 is the voltage conversion circuit schematic diagram;
Figure 15 is the usb circuit schematic diagram.
In figure
1: main control circuit 2:USB interface circuit
3: 4: the first filter circuits of voltage conversion circuit
6: the three filter circuits of 5: the second filter circuits
8: the first duplicate circuitries of 7: the four filter circuits
10: the first antennas of 9: the second duplicate circuitries
11: the second antennas
Embodiment
Below in conjunction with embodiment and accompanying drawing, wireless audio and video of the present utility model and data communication apparatus are described in detail.
Wireless audio and video of the present utility model and data communication apparatus are a kind of being embedded in Domestic set top box to obtain the WI-FI module, vision signal and audio signal can be realized to LAN-sharing by radiofrequency launcher.
As shown in Figure 1, wireless audio and video of the present utility model and data communication apparatus, comprise main control circuit 1 and audio signal and the usb circuit 2 of vision signal and the voltage conversion circuit 3 of external FLASH and EEPROM enable circuits from Set Top Box for reception be connected with main control circuit 1 respectively, described usb circuit 2 and voltage conversion circuit 3 interconnect, it is characterized in that, described main control circuit 1 also connects respectively the first filter circuit 4, the second filter circuit 5, the signal I/O end of the 3rd filter circuit 6 and the 4th filter circuit 7, the signal input/output end of described the first filter circuit 4 and the second filter circuit 5 is connected the first antenna 10 by the first duplicate circuitry 8, the signal input/output end of described the 3rd filter circuit 6 and the 4th filter circuit 7 is connected the second antenna 11 by the second duplicate circuitry 9.The novel Switching Power Supply part that also comprises of this implementation, Switching Power Supply partly can be whole device stable voltage is provided.
As shown in Figure 2, the main control chip of described main control circuit 1 is to adopt the main control chip that model is RT5572-QFN76.Described this main control chip comprises radio frequency transmitting portion, radio frequency reception part, base band signal process part and usb segment: described usb segment is for receiving audio signal and the vision signal from Set Top Box, radio frequency reception partly for received RF signal demodulation output voice and video signal and signaling-information to the base band signal process part; Described base band signal process partly carries out exporting after Base-Band Processing for voice signal, vision signal and signaling-information to described demodulation output, also for carrying out being input to described radio-frequency transmissions part after Base-Band Processing sending voice and video signal and signaling-information; Described radio-frequency transmissions is partly for being modulated at the transmission voice signal after Base-Band Processing and signaling-information on radio-frequency carrier and exporting; Described radio frequency reception part, radio-frequency transmissions part, base band signal process part and usb segment are integrated on chip piece by CMOS technique.
Described radio-frequency (RF) receiving circuit comprises low noise amplifier, orthogonal mixer, two-way intermediate-freuqncy signal processing unit, digital FM demodulator; Described low noise amplifier carries out low noise amplification for the radiofrequency signal to receiving and a minute two-way outputs to described orthogonal mixer; Described orthogonal mixer converts out two-way quadrature intermediate-freuqncy signal for mixing and outputs to respectively two-way intermediate-freuqncy signal processing unit; Described two-way intermediate-freuqncy signal processing unit is processed the intermediate-freuqncy signal of input respectively, the output digital intermediate frequency signal; Described digital FM demodulator carries out demodulation for the two-way digital intermediate frequency signal to input, exports respectively voice and video signal and signaling-information.
Described radio-frequency transmissions circuit comprises warble rate adjuster, phase-locked loop frequency integrator and power amplifier, and described warble rate adjuster carries out the warble rate adjusting for voice and video signal and the signaling-information to input; Described phase-locked loop frequency integrator is for generation of the modulated RF carrier signal; Described power amplifier is for carrying out exporting after power amplification to described modulated RF carrier signal.
Described base band signal process partly comprises reception voice and video processing unit, sends voice and video processing unit and signaling-information processing unit; Described signaling-information processing unit is for carrying out the filter shape processing to the signaling-information received or send; Described reception Audio Processing Unit carries out digital-to-analogue conversion and filter amplifying processing for voice signal, vision signal to described radio frequency reception part; Described transmission Audio Processing Unit is processed for the voice and video signal that will export being carried out to analog-to-digital conversion and filtering.
Shown in Fig. 3, for the 20MHz crystal oscillating circuit of main control circuit 1, this circuit connects respectively pin 50 and the pin 49 of the main control chip in main control circuit 1, is for the chip operation clock reference.
The external FLASH of main control circuit 1 and EEPROM enable circuits as shown in Figure 4, connect respectively pin 7 and the pin 8 of the main control chip in main control circuit 1.
Shown in Fig. 5, be the mode selection circuit of main control circuit 1, this circuit connects the pin 13 of the main control chip RT5572 in main control circuit 1, when GPIO0=1 (Hight) is QA mode, when GPIO0=0 (Low) is Normal mode.
Fig. 6 is the display circuit of main control circuit 1, when LED is bright, shows that wireless audio and video of the present utility model and data communication apparatus are in normal operation.
As shown in Figure 7, described the first duplicate circuitry 8 includes antenna socket E1, detect connector U8 and two merit device U1, wherein, the pin 1 of described antenna socket E1 is by capacitor C 3 ground connection, pin 2 is connected by inductance L 1 pin 3 that detects connector U8 successively with capacitor C 72, the two ends of described inductance L 1 are also respectively by a capacitor C 4/C5 ground connection, detect the pin 6 of connector U8, pin 4, pin 2 and pin 5 ground connection, pin 1 connects the pin 5 of two merit device U1, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the second filter circuit 5 by a capacitor C 2, pin 3 connects the first filter circuit 4.After the signal of the first antenna 10 is divided into 2.4G and 5G signal by antenna socket E1 by the first duplicate circuitry 8 merits, the first via input as main control circuit 1, enter main control circuit 1 by the first filter circuit 4 and the second filter circuit 5 respectively.
As shown in Figure 8, described the second duplicate circuitry 9 includes antenna socket E2, detect connector U9 and two merit device U2, wherein, the pin 1 of described antenna socket E2 is by capacitor C 8 ground connection, pin 2 is connected by inductance L 2 pin 3 that detects connector U9 successively with capacitor C 73, the two ends of described inductance L 2 are also respectively by a capacitor C 9/C10 ground connection, detect the pin 6 of connector U9, pin 4, pin 2 and pin 5 ground connection, pin 1 connects the pin 5 of two merit device U2, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the 4th filter circuit 7 by a capacitor C 7, pin 3 connects the 3rd filter circuit 6.After the signal of the second antenna 11 is divided into 2.4G and 5G signal by antenna socket E2 by the second duplicate circuitry 9 merits, the second tunnel input as main control circuit 1, enter main control circuit 1 by the 3rd filter circuit 6 and the 4th filter circuit 7 respectively.
Be the eeprom circuit schematic diagram of main control circuit 1 shown in Fig. 9, connect respectively pin 33, pin 34 and the pin 35 of main control chip RT5572.
As shown in Figure 10 a, described the first filter circuit 4 is 2.4G signal filter circuits, for filtering harmonic wave, include capacitor C 24 and capacitor C 25, one end of described capacitor C 24 connects the pin 60 of main control circuit 1 and an end of capacitor C 26, one end of described capacitor C 25 connects the pin 59 of the main control chip in main control circuit 1 and the other end of capacitor C 26, the other end of described capacitor C 24 connects respectively capacitor C 23, one end of capacitor C 20 and inductance L 6, the other end of described capacitor C 25 connects respectively the other end of capacitor C 23 and an end of capacitor C 21 and inductance L 5, the other end ground connection of described capacitor C 20 and inductance L 5, the other end of described inductance L 6 and capacitor C 21 is connected respectively capacitor C 16, inductance L 3 and capacitor C 14, the other end ground connection of described capacitor C 16, the other end of inductance L 3 and capacitor C 14 connects the first duplicate circuitry 8 by capacitor C 13 ground connection and by capacitor C 11 respectively.
As shown in Figure 11 a, described the 4th filter circuit 7 is 5G signal filter circuits, for filtering harmonic wave, include the pin 74 that connects respectively the main control chip in main control circuit 1 and capacitor C 38 and the inductance L 15 of pin 75, the other end ground connection of described capacitor C 38, the other end of inductance L 15 connects respectively capacitor C 43 and the first duplicate circuitry 8, the other end ground connection of described capacitor C 43.
As shown in Figure 10 b, described the 3rd filter circuit 6 is 2.4G signal filter circuits, for filtering harmonic wave, include capacitor C 35 and capacitor C 34, one end of described capacitor C 35 connects the pin 70 of the main control chip in main control circuit 1 and an end of capacitor C 33, one end of described capacitor C 34 connects the pin 69 of main control circuit 1 and the other end of capacitor C 33, the other end of described capacitor C 35 connects respectively capacitor C 37, one end of capacitor C 40 and inductance L 14, the other end of described capacitor C 34 connects respectively the other end of capacitor C 37 and an end of capacitor C 39 and inductance L 13, the other end ground connection of described capacitor C 40 and inductance L 13, the other end of described inductance L 14 and capacitor C 39 is connected respectively capacitor C 42, inductance L 16 and capacitor C 45, the other end ground connection of described capacitor C 42, the other end of inductance L 16 and capacitor C 45 connects the first duplicate circuitry 8 by capacitor C 46 ground connection and by capacitor C 47 respectively.
As shown in Figure 11 b, described the second filter circuit 5 is 5G signal filter circuits, for filtering harmonic wave, include capacitor C 22 and the inductance L 4 of the pin 63 that connects respectively the main control chip in main control circuit 1, the other end ground connection of described capacitor C 22, the other end of inductance L 4 connects respectively capacitor C 17 and the second duplicate circuitry 7, the other end ground connection of described capacitor C 17.
In the present embodiment, the model of first day line socket E1 and second day line socket E2 is USB-ANT-RA; The model that detects connector U8 and detection connector U9 is CON MS-156-C; The model of two merit device U1 and two merit device U2 is DPX-165900DT-8025AI.
Figure 12 is the electric source filter circuit that connects the voltage conversion circuit 3 shown in Figure 14, and its output 1.5V and 3.3V voltage are to the voltage conversion circuit shown in Figure 14.
Figure 13 is the electric source filter circuit that connects main control circuit, and the 1.2V voltage of its output connects the pin 18 of the main control chip RT5572 in main control circuit 1.
Be voltage conversion circuit 3 as shown in figure 14, the present embodiment is to adopt the voltage stabilizing chip that model is IT7312DF, the voltage of USB access is changed, for main control chip RT5572.
Claims (7)
1. a wireless audio and video and data communication apparatus, the USB interface for received audio signal and vision signal (2) that comprises main control circuit (1) and be connected with main control circuit (1) respectively and the voltage conversion circuit (3) of external FLASH and EEPROM enable circuits, described USB interface (2) and voltage conversion circuit (3) interconnect, it is characterized in that, described main control circuit (1) also connects respectively the first filter circuit (4), the second filter circuit (5), the signal I/O end of the 3rd filter circuit (6) and the 4th filter circuit (7), the signal input/output end of described the first filter circuit (4) and the second filter circuit (5) is connected the first antenna (10) by the first duplicate circuitry (8), described the 3rd filter circuit (6) is connected the second antenna (11) with the signal input/output end of the 4th filter circuit (7) by the second duplicate circuitry (9).
2. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the first filter circuit (4) is the 2.4G signal filter circuit, include capacitor C 24 and capacitor C 25, one end of described capacitor C 24 connects an end of main control circuit (1) and capacitor C 26, one end of described capacitor C 25 connects the other end of main control circuit (1) and capacitor C 26, the other end of described capacitor C 24 connects respectively capacitor C 23, one end of capacitor C 20 and inductance L 6, the other end of described capacitor C 25 connects respectively the other end of capacitor C 23 and an end of capacitor C 21 and inductance L 5, the other end ground connection of described capacitor C 20 and inductance L 5, the other end of described inductance L 6 and capacitor C 21 is connected respectively capacitor C 16, inductance L 3 and capacitor C 14, the other end ground connection of described capacitor C 16, the other end of inductance L 3 and capacitor C 14 connects the first duplicate circuitry (8) by capacitor C 13 ground connection and by capacitor C 11 respectively.
3. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the second filter circuit (5) is the 5G signal filter circuit, include the capacitor C 38 and the inductance L 15 that connect respectively main control circuit (1), the other end ground connection of described capacitor C 38, the other end of inductance L 15 connects respectively capacitor C 43 and the second duplicate circuitry (9), the other end ground connection of described capacitor C 43.
4. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the 3rd filter circuit (6) is the 2.4G signal filter circuit, include capacitor C 35 and capacitor C 34, one end of described capacitor C 35 connects an end of main control circuit (1) and capacitor C 33, one end of described capacitor C 34 connects the other end of main control circuit (1) and capacitor C 33, the other end of described capacitor C 35 connects respectively capacitor C 37, one end of capacitor C 40 and inductance L 14, the other end of described capacitor C 34 connects respectively the other end of capacitor C 37 and an end of capacitor C 39 and inductance L 13, the other end ground connection of described capacitor C 40 and inductance L 13, the other end of described inductance L 14 and capacitor C 39 is connected respectively capacitor C 42, inductance L 16 and capacitor C 45, the other end ground connection of described capacitor C 42, the other end of inductance L 16 and capacitor C 45 connects the second duplicate circuitry (9) by capacitor C 46 ground connection and by capacitor C 47 respectively.
5. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the 4th filter circuit (7) is the 5G signal filter circuit, include the capacitor C 22 and the inductance L 4 that connect respectively main control circuit (1), the other end ground connection of described capacitor C 22, the other end of inductance L 4 connects respectively capacitor C 17 and the first duplicate circuitry (8), the other end ground connection of described capacitor C 17.
6. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the first duplicate circuitry (8) includes antenna socket E1, detect connector U8 and two merit device U1, wherein, the pin 1 of described antenna socket E1 is by capacitor C 3 ground connection, pin 2 is connected by inductance L 1 pin 3 that detects connector U8 successively with capacitor C 72, the two ends of described inductance L 1 are also respectively by a capacitor C 4/C5 ground connection, detect the pin 6 of connector U8, pin 4, pin 2 and pin 5 ground connection, pin 1 connects the pin 5 of two merit device U1, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the second filter circuit (5) by a capacitor C 2, pin 3 connects the first filter circuit (4).
7. wireless audio and video according to claim 1 and data communication apparatus, it is characterized in that, described the second duplicate circuitry (9) includes antenna socket E2, detect connector U9 and two merit device U2, wherein, the pin 1 of described antenna socket E2 is by capacitor C 8 ground connection, pin 2 is connected by inductance L 2 pin 3 that detects connector U9 successively with capacitor C 73, the two ends of described inductance L 2 are also respectively by a capacitor C 9/C10 ground connection, detect the pin 6 of connector U9, pin 4, pin 2 and pin 5 ground connection, pin 1 connects the pin 5 of two merit device U2, the pin 6 of two merit device U1, pin 4 and pin 2 ground connection, pin 1 connects the 4th filter circuit (7) by a capacitor C 7, pin 3 connects the 3rd filter circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203656761U CN203340236U (en) | 2013-10-31 | 2013-10-31 | wireless audio/video and data communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203656761U CN203340236U (en) | 2013-10-31 | 2013-10-31 | wireless audio/video and data communication device |
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| CN203340236U true CN203340236U (en) | 2013-12-11 |
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| CN2013203656761U Expired - Fee Related CN203340236U (en) | 2013-10-31 | 2013-10-31 | wireless audio/video and data communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656504A (en) * | 2015-08-31 | 2016-06-08 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency circuit and mobile terminal |
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2013
- 2013-10-31 CN CN2013203656761U patent/CN203340236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656504A (en) * | 2015-08-31 | 2016-06-08 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency circuit and mobile terminal |
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Granted publication date: 20131211 Termination date: 20141031 |
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