CN2657308Y

CN2657308Y - Miniature network digital code walkman

Info

Publication number: CN2657308Y
Application number: CN 200320100464
Authority: CN
Inventors: 周烈
Original assignee: FUXINGDA TECHNOLOGY INDUSTRIAL (SHENZHEN) CO LTD
Current assignee: FOXDA TECHNOLOGY INDUSTRIAL (SHENZHEN) Co Ltd
Priority date: 2003-10-17
Filing date: 2003-10-17
Publication date: 2004-11-17
Anticipated expiration: 2013-10-17

Abstract

A micro network digital walkman belongs to a network communication device using semiconductor electronic technology, which is characterized in that the walkman is provided with only one interface socket. The interface socket is connected with an existing DSP digital signal processor through a group of CMOS switch circuits, which forms an automatic switching circuit with three transmission channels of an audio output, an universal serial bus, and a line input, thus automatically choosing various functions by only one interface. Problems of traditional technology with a walkman such as having too many interface sockets, using inconveniently, and having a big body have been solved in the utility model. Multi using by one hole has been realized. Various functional lines can be switched automatically. The walkman of the utility model is easy to use which has a smaller body, low cost and an obvious benefit.

Description

The micronet digital walkman

Technical field

The utility model relates to the network communication device that adopts the semiconductor electronic technology.

Background technology

At present, network digital walkman on the market is USB USB interface, audio output interface, circuit input interface all, is designed to three independently interfaces.The walkman of this structure, not only interface itself takes up space greatly, and its supporting dust cap has also influenced the further miniaturization of body; Each interface has its independently function in addition, and the user is difficult with identification, uses inconvenience; And how interface socket also increase production cost, reduced competitiveness of product; If the same interface that adopts mechanical type to switch must be manually, reliability is also poor.

The utility model content

The utility model is exactly to overcome the shortcoming that above-mentioned prior art exists, and a kind of micronet digital walkman is provided, and this walkman has realized that audio frequency output, USB communication, circuit import shared same interface socket and automatically switch, and its volume is little, and is easy to use.

The purpose of this utility model can be achieved through the following technical solutions:

The utility model micronet digital walkman, comprise the DSP digital signal processor, and the connected microphone of difference, battery, keyboard, the FM tuner, flash memory, LCD and driver thereof, backlight and driver thereof, it is USB that the DSP digital signal processor is provided with USB, audio frequency output, circuit is imported each I/O interface, also have the circuit input to select control end, it is characterized in that: this walkman is only established an interface socket, USB at this interface socket and DSP digital signal processor, audio frequency output, circuit is imported between each I/O interface and is connected to the cmos switch circuit, constitute audio frequency output, USB, circuit is imported the automatic switch-over circuit of each transmission channel, promptly when linking to each other with earphone, connects this interface socket audio frequency output channel automatically, when it links to each other with the computer industrial siding, connect the usb communication passage automatically, when it links to each other with external sound source, connect the circuit input channel automatically.

The utility model micronet digital walkman, wherein said interface socket are provided with 3 independently terminals at least, also have 1 earth terminal.

The utility model micronet digital walkman, the structure of wherein said cmos switch circuit is:

The source electrode that CMOS pipe Q2 and CMOS pipe Q3 are set links to each other, the drain electrode of pipe Q3 connects audio output port through capacitor C 1, the drain electrode of pipe Q2 is through 1 pin of inductance B1 combination hub J1, the source electrode that CMOS pipe Q8 and CMOS pipe Q9 are set links to each other, the drain electrode of pipe Q9 connects another port of audio frequency output through capacitor C 2, the drain electrode of pipe Q8 is through 2 pin of inductance B2 combination hub J1, the grid of pipe Q2, Q3, Q8, Q9 links to each other, on this node, also be connected to resistance R 2, another termination power vd D of this resistance, the collector electrode of triode Q1 links to each other with above-mentioned node, its base stage connecting resistance R5, grounded emitter;

The source electrode that CMOS pipe Q4 and CMOS pipe Q5 are set links to each other, the drain electrode of pipe Q5 connects the data lines of USB through resistance R 1, the drain electrode that Q2 is taken in the drain electrode of pipe Q4, the source electrode that CMOS pipe Q12 and CMOS pipe Q13 are set links to each other, the drain electrode of pipe Q13 connects another data lines of USB through resistance R 6, the drain electrode that Q8 is taken in the drain electrode of pipe Q12, the grid of pipe Q4, Q5, Q12, Q13 links to each other, also be connected to resistance R 7, R8 on this node, the other end of resistance R 5 also is connected on this node, 3 pin of the other end combination hub J1 of resistance R 7, the other end ground connection of resistance R 8;

The source electrode that CMOS pipe Q6 and CMOS pipe Q7 are set links to each other, the drain connection road input port of pipe Q7, the drain electrode that Q3 is taken in the drain electrode of pipe Q6, the source electrode that CMOS pipe Q10 and CMOS pipe Q11 are set links to each other another port of the drain connection road input of pipe Q11, the drain electrode that Q9 is taken in the drain electrode of pipe Q10, the grid of pipe Q6, Q7, Q10, Q11 links to each other, also be connected to resistance R 3, R4 on this node, control end SW1, the other end ground connection of resistance R 3 are selected in the other end link input of resistance R 4;

4 pin of socket J1 are through inductance B3 ground connection.

The utility model micronet digital walkman, the structure of wherein said cmos switch circuit can also be, CMOS pipe Q6 with circuit input circuit in the foregoing circuit, the drain electrode of Q10 is connected to the CMOS pipe Q2 of audio frequency output loop respectively, Q8 each with the CMOS in USB loop pipe Q4, on the node that the Q12 drain electrode is joined, and again at audio frequency output loop CMOS pipe Q2, Q3, Q8, insert the collector electrode of another triode on the node that the Q9 grid links to each other, the base stage of this triode is selected control end SW1 through the input of resistance link, grounded emitter, all the other structures of circuit are same as described above.

The utility model micronet digital walkman, in the wherein said cmos switch circuit, the drain electrode that the connected mode of CMOS pipe also can be per two relevant CMOS pipes in each loop links to each other, its source electrode connects according to the circuit structure of aforementioned drain electrode, and other structure of the connected mode of grid and circuit all as hereinbefore.

Major advantage of the present utility model is: owing to adopt the cmos switch circuit, the interface socket with corresponding construction of joining, earpiece audio output, USB communication, the circuit of having finished walkman are imported the automatic switchover of three kinds of functions, realized only just can providing the conversion of multiple communication mode to use with an interface socket, not only made things convenient for the user, also dwindled the volume of body greatly, promptly beautified outward appearance and reduced cost again, economic benefit, social benefit are obvious.

Description of drawings

Fig. 1 is the utility model circuit structure block diagram;

Fig. 2 is cmos switch circuit theory diagrams among the utility model embodiment 1.

Embodiment

The CMOS pipe is complementary metal-oxide-semiconductor field effect transistor in the present embodiment, and flash memory (Flash Memory) is the NAND type, battery after the conversion of DC/DC direct current～DC boost converter to circuit supply.(following) referring to Fig. 2

In the cmos switch circuit: 2 pin that CMOS pipe Q2 and Q3 are set link to each other, the 1 foot meridian capacitor C1 of pipe Q3 meets audio output port L1NE-OUT-R, 1 pin of pipe Q2 is through 1 pin of inductance B1 combination hub J1,2 pin of CMOS pipe Q8 and Q9 link to each other, the 1 foot meridian capacitor C2 of pipe Q9 meets the another port L1NE-OUT-L of audio frequency output, 1 pin of pipe Q8 is through 2 pin of inductance B2 combination hub J1, pipe Q2, Q3, Q8,3 pin of Q9 link to each other, on this node, also be connected to resistance R 2, another termination power vd D of this resistance, collector electrode c and the above-mentioned node of triode Q1 join, its base stage b connecting resistance R5, emitter e ground connection; 2 pin that CMQS pipe Q4 and Q5 are set link to each other, and 1 pin of pipe Q5 meets the data lines USB-D of USB through resistance R 1 ^-, 1 pin of pipe Q4 is taken over 1 pin of Q2, and 2 pin of CMOS pipe Q12 and Q13 link to each other, and 1 pin of pipe Q13 meets another data lines USB-D of USB through resistance Q6 ⁺, 1 pin of pipe Q12 is taken over 1 pin of Q8, and 3 pin of pipe Q4, Q5, Q12, Q13 link to each other, and also are connected to resistance R 7, R8 on this node, 3 pin of the other end combination hub J1 of resistance R 7, the other end ground connection of resistance R 8, the other end of resistance R 5 also is connected on this node; When socket J1 links to each other with the computer industrial siding, obtain the 5V power supply through 3 pin of socket J1, make pipe Q4, Q5, Q12, Q13 conducting through resistance R 7, then link up 1 pin from socket J1,2 pin respectively to USB-D ^-, USB-D ⁺Passage, realized the USB communication function; Meanwhile the 5V power supply to triode Q1, makes its conducting through resistance R 7, R5, then manages Q2, Q3, Q8, Q9 end.When socket J1 links to each other with earphone, the base stage b of triode Q1 is through resistance R 5, R8 ground connection again, then managing Q1 ends, power vd D makes pipe Q2, Q3, Q8, Q9 conducting through resistance R 2,1 pin, 2 pin of then linking up from socket J1 to the passage of L1NE-OUT-R, L1NE-OUT-L, have been realized audio output function respectively.Realize the automatic switchover of USB, audio frequency output channel thus.2 pin that CMOS pipe Q6 and Q7 are set link to each other, the 1 pin link input port L1NE-1N-R of pipe Q7,1 pin of pipe Q6 is taken over 1 pin of Q3,2 pin of CMD Q10 and Q11 link to each other, the another port L1NE-1N-L of the 1 pin link input of pipe Q11, and 1 pin of pipe Q10 is taken over 1 pin of Q9,3 pin of pipe Q6, Q7, Q10, Q11 link to each other, also be connected to resistance R 3, R4 on this node, control end SW1, the other end ground connection of resistance R 3 are selected in the other end link input of resistance R 4; 4 pin of socket J1 are through inductance B3 ground connection.When socket J1 links to each other with external sound source, because triode Q1 is in cut-off state, then power vd D makes pipe Q2, Q3, Q8, Q9 conducting through resistance R 2, when the DSP digital signal processor is selected control end SW1 high level, this level makes pipe Q6, Q7, Q10, Q11 conducting through resistance R 4, then from 1 pin of socket J1 through inductance B1, the passage of pipe Q2, Q3, Q6, Q7 to L1NE-1N-R is linked up, equally, from 2 pin of socket J1 through inductance B2, the passage of pipe Q8, Q9, Q10, Q1 1 to L1NE-1N-L is also linked up, thereby realizes the automatic switchover of circuit input channel.Inductance B1, B2, B3 adopt the stacking magnetic bead of ferrite in the present embodiment, are used to prevent signal radiation.1 pin of above-mentioned each CMOS pipe is drain electrode (D), and 2 pin are source electrode (S), and 3 pin are grid (G).

Embodiment 2

With 1 pin of CMOS pipe Q6, Q10 in the circuit input circuit of cmos switch circuit described in the embodiment 1 respectively with the audio frequency output loop in 1 pin of CMOS pipe Q2, Q8 join and the collector electrode of another triode of access on pipe Q2 and node that the Q8 grid links to each other, the base stage of this triode is selected control end SW1 through the input of resistance link, its grounded emitter, all the other structures of circuit are identical with embodiment 1.

Embodiment 3

The pipe Q2 of CMOS and Q3 in the described cmos switch circuit, pipe Q8 and Q9, pipe Q4 and Q5, pipe Q12 and Q13, pipe Q6 are with Q7, pipe Q10 and when 10 link to each other respectively, 1 pin (i.e. drain electrode) with each pipe links to each other, 1 pin place in circuit in its 2 pin (being source electrode) alternate embodiment 1, all the other structures of the connected mode of each tube grid and circuit are identical with embodiment 1.

Claims

1, a kind of micronet digital walkman, comprise the DSP digital signal processor, and the connected microphone of difference, battery, keyboard, the FM tuner, flash memory, LCD and driver, backlight and driver, it is USB that the DSP digital signal processor is provided with USB, audio frequency output, circuit is imported each I/O interface, also have the circuit input to select control end, it is characterized in that: this walkman is only established an interface socket (J1), USB at this interface socket and DSP digital signal processor (I), audio frequency output, circuit is imported and is connected to cmos switch circuit (II) between each I/O interface, constitute audio frequency output, USB, circuit is imported the automatic switch-over circuit of each transmission channel, promptly when linking to each other with earphone, connects this interface socket audio frequency output channel automatically, when it links to each other with the computer industrial siding, connect the usb communication passage automatically, when it links to each other with external sound source, connect the circuit input channel automatically.

2, micronet digital walkman according to claim 1 is characterized in that: described interface socket (J1) is provided with 3 independently terminals at least, also has 1 earth terminal.

3. micronet digital walkman according to claim 1 is characterized in that: the structure of described cmos switch circuit is:

The source electrode that CMOS pipe (Q2) and CMOS pipe (Q3) are set links to each other, the drain electrode of pipe (Q3) connects audio output port through electric capacity (C1), the drain electrode of pipe (Q2) is through 1 pin of inductance (B1) combination hub (J1), the source electrode that CMOS pipe (Q8) and CMOS pipe (Q9) are set links to each other, the drain electrode of pipe (Q9) connects another port of audio frequency output through electric capacity (C2), the drain electrode of pipe (Q8) is through 2 pin of inductance (B2) combination hub (J1), pipe (Q2, Q3, Q8, Q9) grid links to each other, on this node, also be connected to resistance (R2), another termination power (VDD) of this resistance, the collector electrode of triode (Q1) links to each other with above-mentioned node, its base stage connecting resistance (R5), grounded emitter;

The source electrode that CMOS pipe (Q4) and CMOS pipe (Q5) are set links to each other, the drain electrode of pipe (Q5) connects the data lines of USB through resistance (R1), the drain electrode of (Q2) is taken in the drain electrode of pipe (Q4), the source electrode that CMOS pipe (Q12) and CMOS pipe (Q13) are set links to each other, the drain electrode of pipe (Q13) connects another data lines of USB through resistance (R6), the drain electrode of (Q8) is taken in the drain electrode of pipe (Q12), pipe (Q4, Q5, Q12, Q13) grid links to each other, also be connected to resistance (R7 on this node, R8), the other end of resistance (R5) also is connected on this node, 3 pin of the other end combination hub (J1) of resistance (R7), the other end ground connection of resistance (R8);

The source electrode that CMOS pipe (Q6) and CMOS pipe (Q7) are set links to each other, the drain connection road input port of pipe (Q7), the drain electrode of (Q3) is taken in the drain electrode of pipe (Q6), the source electrode that CMOS pipe (Q10) and CMOS pipe (Q11) are set links to each other, another port of the drain connection road input of pipe (Q11), the drain electrode of (Q9) is taken in the drain electrode of pipe (Q10), the grid of pipe (Q6, Q7, Q10, Q11) links to each other, also be connected to resistance (R3, R4) on this node, control end (SW1), the other end ground connection of resistance (R3) are selected in the other end link input of resistance (R4);

4 pin of socket (J1) are through inductance (B3) ground connection.

4. micronet digital walkman according to claim 1, it is characterized in that: the structure of described cmos switch circuit can also be, CMOS pipe (Q6 with circuit input circuit in the power 3 described circuit, Q10) drain electrode is connected to the CMOS pipe (Q2 of audio frequency output loop respectively, Q8) each manages (Q4 with the CMOS in USB loop, Q12) on the node that drain electrode is joined, and again at audio frequency output loop CMOS pipe (Q2, Q3, Q8, Q9) insert the collector electrode of another triode on the node that grid links to each other, the base stage of this triode is selected control end (SW1) through the input of resistance link, grounded emitter, all the other structures of circuit are described identical with power 3.

5. according to claim 1 or 3 or 4 described micronet digital walkmans, it is characterized in that: in the described cmos switch circuit, the drain electrode that the connected mode of CMOS pipe also can be per two relevant CMOS pipes in each loop links to each other, its source electrode is according to power 3 or weigh the circuit structure connection that drains in 4, and other structure of the connected mode of grid and circuit is all described identical with power 3.