CN2525594Y

CN2525594Y - Independent listening computer

Info

Publication number: CN2525594Y
Application number: CN 01231149
Authority: CN
Inventors: 徐虹庆
Original assignee: TCL COMPUTER SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY
Current assignee: TCL Computer Technology Co Ltd
Priority date: 2001-08-02
Filing date: 2001-08-02
Publication date: 2002-12-11
Anticipated expiration: 2011-08-02

Abstract

The utility model provides an independent listening computer, comprising a case, a main board, a power supply, a CD driver and a software system. The utility model is characterized in that: the power supply is provided with an additional auxiliary power supply and is independently powered by the auxiliary power supply, and the CD driver is connected with the main board by an IDE wire; the case is provided with an independent listening control key board and an audio frequency distribution amplification circuit comprising a left sound channel amplifier, a right sound channel amplifier and a double electronic switch; a CD audio frequency signal of the CD driver is connected with the input ends of the amplifiers and the CD-IN interface of the main board; the output ends of the amplifiers are respectively connected with two input ends of the double electronic switch, and a 'middle arrangement Audio' signal terminal on the main board is connected with the other two input ends of the double electronic switch, and the output ends of the double electronic switch are connected with a active speaker, thereby, the switch between two groups of audio frequency signals is achieved under the control of power on/off signals. The utility model has the advantages of novel design and beautiful appearance, and the computer is a hi-fi equipment playing CD discs if the computer is powered off, while still a common computer with traditional functions if the computer is powered on.

Description

Listen computer separately

Technical field

The utility model relates to computing machine and stereo set, specifically be a kind of computer system can the play CD disc under the open state listen computer separately.

Background technology

Existing computer has multimedia function more, can the play CD disc, VCD sheet etc., but under the situation that computer is not started shooting, then can't appreciate beautiful music by the play CD disc.

Summary of the invention

Above-mentioned shortcoming in view of existing computer exists the utility model proposes a kind of independent tin of computer, and computer becomes a stereo set under the state that system does not start shooting, can the play CD disc, and computer is still a computer with traditional function under open state.

This listens computer separately, comprises cabinet, mainboard, power supply, CD-ROM drive and software systems etc., it is characterized in that:

Described power supply be provided with another group+5V ,+the 12V accessory power supply, CD-ROM drive is powered separately by described accessory power supply, CD-ROM drive connects mainboard by the IDE line.

Described cabinet is provided with listens the control keypad separately, and its function button is in parallel with function corresponding button on the CD-ROM drive panel.

Also be provided with an audio distribution amplifying circuit, this circuit contains left and right acoustic channels amplifier and bielectron switch, and auxiliary+5V power supply connects its power end; The CD sound signal of CD-ROM drive is connected to the left and right acoustic channels amplifier input terminal, receives the CD-IN interface of mainboard simultaneously; Two input ends of bielectron switch are received in the output of left and right acoustic channels amplifier respectively, be connected to two other input end of bielectron switch from the signal of mainboard " mid-Audio ", the output terminal of bielectron switch is connected to the source audio amplifier, and the bielectron switch is finished the switching of two groups of sound signals under the control of start/off-mode signal.System not under the open state computer become a play CD disc stereo set, computer is still a computer with traditional function under open state.

The utility model technical conceive novelty, handsome in appearance, it is by configuration audio distribution amplifying circuit card, and associated components carried out a little improvement, even having, traditional computer listens CD disc function separately, be a traditional computer under the normal boot-strap state, computer is a CD player when standby.

Description of drawings

Fig. 1 is this exemplary embodiments structural drawing of listening computer separately;

Fig. 2 is that this listens the computer theory diagram separately;

Fig. 3 a is the Pin1 signal waveform of conventional I DE winding displacement;

Fig. 3 b is the corresponding Pin1 circuit of improved CD-ROM drive;

Fig. 3 c for the Pin1 circuit that adopts Fig. 3 b after the Pin1 signal waveform;

Fig. 3 d is the connector synoptic diagram of CD-ROM drive;

Fig. 4 is its audio distribution amplification circuit diagram;

Fig. 5 is its audio distribution card synoptic diagram;

Embodiment

As implement shown in the illustration 1, listen computer housing to adopt new appearance design separately, its cabinet 1 integral body is streamlined.The rear end of cabinet panel 2 is provided with handgrip 3, is convenient to the user and moves.For making computer have the CD player function, tin control keypad 4 separately is set at the panel top, keypad 4 is equipped with " broadcast ", " ejection ", " volume+" and " volume-" function key, each function key is in parallel with function corresponding key on the CD-ROM drive panel, and " listening button separately " and " power button " etc. also can be installed on the keypad 4.Other parts shown in Fig. 1 are CD drive 5 and floppy disk 6 etc.The cover plate of keypad adopts translucent scheme backlight, also can control these buttons easily as mobile phone in the dim light of night, has really embodied the electrification of domestic design concept.Realize independent auditory function, CD-ROM drive must not start at main frame under the state of (system is in holding state) can operate as normal, i.e. playing back music CD, and sound signal amplifies the back by active audio amplifier and arrives man-machine interface.In addition, under the prerequisite that as far as possible reduces the cost increase, for strengthening the outward appearance impression that this function is brought to the user, we are drawn out to cabinet with four CD Play Control keys on the CD-ROM drive panel from the CD-ROM drive rear and control, and are equipped with state backlight stiffening effect.

For realizing independent auditory function, require: 1. power supply when standby (start) or open state, can both provide one group+5V and+output of 12V voltage uses for CD-ROM drive;

2. work as mainboard and be in holding state (host computer system is not activated), CD-ROM drive normally is connected in mainboard by the IDE line, when this CD-ROM drive is powered at one group of independent additional supply, and energy normal play CD;

3. work as mainboard and be in holding state, when promptly the integrated sound card on the mainboard was not powered, the sound signal of CD-ROM drive play CD can arrive active audio amplifier, and in case after the start, the audio-frequency unit of total system recovers normal condition immediately;

4. since the former preposition Audio on the mainboard can't use when being in holding state in system, must Audio part of redesign (or to mainboard redesign) so that no matter still can both use Audio under the off-mode in start.

The utility model has been done particular design to parts such as mainboard, power supply, CD-ROM drives for this reason.Also designed an audio distribution card separately, also can realize independent auditory function to adapt on common mainboard, the upgrading of convenient mainboard later on changes.

Its principle as shown in Figure 2, listen separately power supply than common ATX power supply set up one group+5V ,+the 12V accessory power supply; Mainboard is in holding state, and CD-ROM drive connects mainboard by the IDE line, and CD-ROM drive is powered separately by described accessory power supply.Listen the control keypad separately, its function button is in parallel with function corresponding button on the CD-ROM drive panel.

Also be provided with an audio distribution amplifying circuit, this circuit contains left and right acoustic channels amplifier and bielectron switch, and auxiliary+5V power supply connects its power end; The CD sound signal of CD-ROM drive is connected to the left and right acoustic channels amplifier input terminal, receives the CD-IN interface of mainboard simultaneously; Two input ends of bielectron switch are received in the output of left and right acoustic channels amplifier respectively, be connected to two other input end of bielectron switch from the signal of mainboard " mid-Audio ", the output terminal of bielectron switch is connected to the source audio amplifier, and the bielectron switch is finished the switching of two groups of sound signals under the control of machine open/close status signal; System not under the open state computer become a play CD disc stereo set, computer is still a computer with traditional function under open state.

Improvement part of the present utility model is described in detail as follows:

1) power supply is modified into and listens power supply separately

Under Standby state (system connects with the mains, but also is not activated), power supply can provide the normal operation of CD-ROM required electric current and voltage, and does not influence the normal operation of PC.

On original ATX power supply basis, improve, power supply inner increase auxiliary+5V ,+the 12V power supply, separately to the CD-ROM power supply, and provide an output of listening switch and LED lamp to be used to control and indicate accessory power supply separately.Under the Standby state, accessory power supply can provide CD-ROM required voltage, and listens switch can control the work of CD-ROM separately.Under working state of system, listen switch inoperative separately, and accessory power supply can guarantee stably to power to CD-ROM always.

2) improvement of CD-ROM drive

Use common CD-ROM drive, when mainboard is in holding state (host computer system is not activated), CD-ROM drive normally is connected in mainboard by the IDE line, and this CD-ROM drive is when being powered separately by another group power supply, and CD-ROM drive can be in a kind of improper state, can't use at all.According to our research, on first Pin pin of its reason from the IDE winding displacement of 40Pin.According to the definition of IDE specification, the effect of Pin1 is " Reset ", and the same Pin2 of Pin1 (GND) transmits " Reset " signal shown in Fig. 3 a that mainboard is sent here by the instantaneous variation of level, to reach the effect that CD-ROM drive is resetted.

After mainboard powered on, Pin1 was in always+level of 5V, have only when " Reset " signal arrives, and just have the level wave form varies shown in the last figure.And be in holding state when mainboard, even CD-ROM drive can be powered separately, but because the Pin1 of impedance of mainboard or the like factor by the IDE winding displacement itself to " pining down " (soon Reset pulls to low level) of CD-ROM drive, causes CD-ROM drive to be in abnomal condition.

When making system closedown, make between Pin1 and the Reset to be in off-state; After the start, the level wave form varies of " Reset " signal can normally be passed through, and normally resets.The utility model can be done to improve shown in Fig. 3 b at the circuit of the corresponding Pin1 of CD driver, series capacitance C between the Pin1 pin of the Reset of CD-ROM drive end and mainboard IDE line (40 Pin), preceding termination one resistance R of capacitor C extremely+the 5V power supply.The effect of capacitor C is to isolate Pin1 and Reset in when shutdown, makes the CD-ROM drive can operate as normal (play CD), and utilizes the characteristic of capacitor charge and discharge that the transmission of Reset signal is gone over after the start, and CD-ROM drive can normally be resetted; Connect before the electric capacity 2K resistance R to the+5V be for the level waveform that the electric capacity two ends are transmitted similar as far as possible, the desirable 2K of above-mentioned resistance R, capacitor C is 2.2uF.After circuit so improves, originally the level wave form varies of " Reset " signal after electric capacity transmits, its signal waveform generally speaking (slightly different) according to different mainboards shown in Fig. 3 c..

In addition " four function key and earphone jack signal " of CD-ROM drive front panel with the mode of " parallel connection " transformation by the CD driver circuit board from the rear end mode with contact pin draw, be connected to and listen control panel separately, shown in the connector synoptic diagram 3d of visible CD-ROM drive.

3) audio distribution part

Listen separately the audio distribution amplifying circuit of computer can design on mainboard, also can be designed to the audio distribution card, realize separately tin to adapt to be connected with common mainboard.Designed audio distribution card function in some mainboard of our company's computer.

The audio distribution amplifying circuit is seen Fig. 4, the audio distribution amplifying circuit contains left and right acoustic channels amplifier and bielectron switch, circuit is by auxiliary+5V power supply power supply, and the left and right acoustic channels amplifier adopts double operational circuit LM358, and the bielectron switch adopts PHILIPS 4052 electronic switches etc.Amplifier can be traditional negative feedback audio amplifier circuit, the left and right acoustic channels symmetry, be connected resistance R 2 and capacitor C 8 between output 1 end of LM358 and the inverting input 2, inverting input 2 connecting resistance R6 and capacitor C 2 are to ground, and the CD signal is by the in-phase input end 3 of C4, resistance R 5 input LM358; Be connected resistance R 1 capacitor C 7 between the output terminal 7 of LM358 and the inverting input 6, inverting input 6 connecting resistance R2 and capacitor C 2 ' are to ground, and the CD signal is by the in-phase input end 5 of C3, resistance R 4 input LM358.LM358 two outputs connect 16 and 5 pin of electronic switch 4052 by capacitor C 1, C6, be connected to two other input end 3,12 of electronic switch 4052 from the signal of mainboard " mid-Audio ", 4052 output terminal 14,2 is connected to the source audio amplifier, the machine open/close status signal connects 4052 control end 7,10, finishes the switching of two groups of sound signals under the control of machine open/close status signal.

Sound card all is the soft sound card that is integrated on the mainboard generally, and the CD-IN slot also just is arranged on the mainboard, be connected by the tone frequency channel wire of a four-core and the CD-OUT of CD-ROM drive, and the sound signal when being used for transmitting play CD, the amplifying circuit of the integrated sound card of process outputs to audio amplifier.Because when being in holding state, this part amplifying circuit of integrated sound card can not use, if additional equipment (audio jack of active audio amplifier must insert the rear portion of cabinet) not, play CD just can't allow the audio amplifier sounding during shutdown.

Also have one the tunnel in addition " shutdown does not have, start have "+5V control level (promptly at the machine open/close status signal) and-5V (for reducing the distortion of simulated audio signal in transmission) voltage, by the electronic switch function of PHILIPS4052 chip, this two states of startup and shutdown is done corresponding circuit switch.The LINE OUT people who originally is connected with active audio amplifier on the integrated sound card is for masking, and active audio amplifier is connected to the output of electronic switch.When shutdown, directly after amplifying (being generally about twice), output to active audio amplifier from the sound signal of CD-ROM drive output.After the start, the signal direct electron switch of taking from mainboard " mid-Audio " outputs to active audio amplifier.

The audio distribution card is shown in Figure 5 as illustrating.

(1), when mainboard does not start, V1 is a low level, only output to Line Out from the sound signal of CD-ROM after through the amplification about twice this moment;

(2), after mainboard starts, V1 be high level (+5V), this moment, CD-ROM directly linked to each other with MIANBOARD, and while Audio In directly links to each other with Line Out;

(3), V3 with CD-ROM drive+state of 5V electric power system is identical;

(4), V2 is 0 when mainboard does not start, and provides after mainboard starts-output of 5V voltage, its effect is to reduce the signal transmission distortion of CD-ROM to MIANBOARD and Audio In to Line Out under open state.

Claims

1, a kind of independent tin of computer comprises cabinet, mainboard, power supply, CD-ROM drive and software systems, it is characterized in that:

Described power supply be provided with another group+5V ,+the 12V accessory power supply; CD-ROM drive is powered separately by described accessory power supply, and CD-ROM drive connects mainboard by the IDE line;

Described cabinet is provided with listens the control keypad separately, and its function button is in parallel with function corresponding button on the CD-ROM drive panel;

Also be provided with an audio distribution amplifying circuit, this circuit contains left and right acoustic channels amplifier and bielectron switch, and auxiliary+5V power supply connects its power end; The CD sound signal of CD-ROM drive is connected to the left and right acoustic channels amplifier input terminal, receives the CD-IN interface of mainboard simultaneously; Two input ends of bielectron switch are received in the output of left and right acoustic channels amplifier respectively, be connected to two other input end of bielectron switch from the signal of mainboard " mid-Audio ", the output terminal of bielectron switch is connected to the source audio amplifier, and the bielectron switch is finished the switching of two groups of sound signals under the control of machine open/close status signal;

2, independent tin of computer according to claim 1 is characterized in that: the left and right acoustic channels amplifier of described audio distribution amplifying circuit adopts the double operational circuit, and the bielectron switch adopts PHILIPS 4052 electronic switches.

3, independent tin of computer according to claim 1 is characterized in that: the design of described audio distribution amplifying circuit realizes separately tin to adapt to be connected with common mainboard on the audio distribution card.

4, independent tin of computer according to claim 1 is characterized in that: described audio distribution amplifying circuit design is on mainboard.

5, independent tin of computer according to claim 1, it is characterized in that: described cabinet is the streamlined cabinet, the control keypad of listening separately at cabinet top has translucent backlight.

6, independent tin of computer according to claim 5, it is characterized in that: the top of described streamlined cabinet is provided with handgrip.

7, independent tin of computer according to claim 1 is characterized in that: tin control button separately of described cabinet is that " broadcast ", " ejection ", " volume+" reach " volume-" key.

8, independent tin of computer according to claim 1 is characterized in that: series capacitance C between the Pin1 pin of the Reset of CD-ROM drive end and mainboard IDE line (40 Pin), the preceding terminating resistor R of capacitor C extremely+the 5V power supply.