CN1296216A

CN1296216A - Programmable tone quality control circuit on mainboard

Info

Publication number: CN1296216A
Application number: CN 99124312
Authority: CN
Inventors: 陈再生; 张乃舜
Original assignee: Via Technologies Inc
Current assignee: Via Technologies Inc
Priority date: 1999-11-15
Filing date: 1999-11-15
Publication date: 2001-05-23
Anticipated expiration: 2019-11-15
Also published as: CN1171142C

Abstract

The tone control chip is coupled between code-decode device and amplifier on the mainboard for receiving sound source signal of code-decode device and utilizing game port to produce clock signal and data signal to control tone control chip to make tone control chip produce output signal. Said output signal is received by amplifier and amplified, then the sound with high tone quality can be outputted by loudspeaker.

Description

Tone control circuit able to programme on the motherboard

The present invention relates to a kind of tone control circuit, the tone control circuit able to programme on particularly a kind of motherboard.

Please refer to Fig. 1, it is the source of sound generation circuit on the known motherboard.Couple a codec (CODEC) 20 on south bridge control chip 10, it can produce sound source signal, and sound source signal is sent to amplifier 30 sound source signal is amplified, and produces audio frequency output via output line (LINE-OUT) 40.

Yet the source of sound on the known motherboard produces circuit can be amplified the sound source signal that codec 20 produces via amplifier 30, and the function of amplifier 30 is merely able to the sound of sound source signal be amplified or reduce, and does not have the function of control sound source signal sound tonequality.That is the source of sound on the known motherboard produces the control function that circuit does not have stereoeffect (Stereo), bass effect (Bass), high pitch effect (Treble), L channel effect (LeR Volume) and R channel effect (Right Volume).If will reach above-mentioned functions, be merely able to utilize software to control, can increase the load of CPU like this, and reduce the treatment effeciency of CPU.

Therefore the invention provides the tone control circuit able to programme on a kind of motherboard, the tonequality control chip is coupled between the codec and amplifier on the motherboard,, reach the control of various effects in order to change various audio frequencies.

The invention provides the tone control circuit able to programme on a kind of motherboard, utilize the tonequality control chip to change various audio frequencies, reach the control of various effects, and reduce the load of CPU, improve the treatment effeciency of CPU.

The invention provides the tone control circuit able to programme on a kind of motherboard, comprising:

Codec, it can produce sound source signal; The tonequality control chip is coupled to codec, in order to receiving sound source signal, and controls tonequality via clock signal and data-signal, the generation output signal; Amplifier is coupled to the tonequality control chip, in order to the reception output signal, and amplifies output signal; Control port is coupled to the tonequality control chip, in order to produce the clock signal and the data-signal of control tonequality.

Control chip group comprises controller and control port; Codec is coupled to the controller of control chip group, in order to produce sound source signal; The tonequality control chip is coupled to codec, is used for receiving sound source signal, and the tonequality control chip is coupled to the control port of control chip group, and clocking and data-signal control the tonequality of sound source signal, produces output signal; Amplifier is coupled to the tonequality control chip, is used for receiving output signal, and amplifies output signal.

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:

The simple declaration of accompanying drawing:

Fig. 1 is that the source of sound on the known motherboard produces circuit diagram;

Fig. 2 is the control pin of tonequality control chip;

Fig. 3 is the connection diagram of tonequality control chip on motherboard;

Fig. 4 is the tone control circuit synoptic diagram able to programme on the motherboard of the present invention; And

Fig. 5 a, 5b, 5c and 5d are the pin figure of actual pin on the motherboard of preferred embodiment of the present invention.

The invention is characterized in the tonequality control chip is in the layout of on the motherboard of PC or portable computer, to improve the tonequality of computer institute output sound.

According to present embodiment, this tonequality control chip can use the model of being produced as the National Semiconductor company tonequality control chip as LMC1982.The control pin of this tonequality control chip as shown in Figure 2.The signal of this tonequality control chip 70 can be by the input (LEFT INPUT1) and 25th pin input (RIGHT INPUT1) as right sound source signal of its 4th pin as left sound source signal.And via the input of the clock (CLK) of the 1st pin and data (DATA) the signal input of the 28th pin control left and right sides sound source signal and be converted to have stereoeffect, the output signal of bass effect, high pitch effect, L channel effect and R channel effect.Produce L channel output (LOUT) via the 13rd pin more at last, and produce R channel output (ROUT) via the 16th pin.

Data-signal input and clock are input as two input ends of major control tonequality and audio.The data-signal input is the serial signal that is produced by controller outside, and its length is 16, and preceding 8 is address signal, in order to the selection function project, 8 of backs are data, in order to change the setting value of selected functional item, reach the purpose of tonequality and sound effect control.And the data transmission rate (data rate) of this data-signal input is 1MHz to the maximum.And this data-signal input must be imported coupling mutually with clock signal, and data-signal just belongs to effectively when the rising edge (rising clock edge) of clock sequence.And following table 1 is for to utilize data-signal input to select every function of tonequality control chip:

Table 1

Please refer to Fig. 3, it is the connection diagram of tonequality control chip on motherboard.This tonequality control chip 70 can input to the sound source signal that codec is exported the input end of tonequality control chip 70 on motherboard 45, as

4 and 25, and according to the signal that clock CLK pin 1 and data DATA pin 28 are received sound source signal is converted to have stereoeffect, the high tone quality voice signal of bass effect, high pitch effect, L channel effect and R channel effect, export again this signal to the loudspeaker of outside to play out sound with high tone quality.

The control of above-mentioned effect can produce the clock CLK pin 1 and data DATA pin 28 that data-signals (MDATA) and clock signal (MCLK) input to tonequality control chip 70 by control port 110, uses the tonequality of the sound source signal that the control codec exports.

Please refer to Fig. 4, it is the tone control circuit synoptic diagram able to programme on the motherboard of the present invention.Motherboard 45 ' on be coupled to codec 60 by the AC97 controller 52 in the south bridge control chip 50, it can receive the control signal of AC97 controller 52, to produce sound source signal.Sound source signal is sent to the input end of the tonequality control chip 70 of Fig. 2, as

4 and 25, use sound source signal is converted to have stereoeffect, the output signal of bass effect, high pitch effect, L channel effect and R channel effect, and by the output terminal output of tonequality control chip 70, as

13 and 16.

Amplifier 80 amplifies the output signal of tonequality control chip 70 and is passed to output line 90 and produces audio frequency and export external playing device to.And above-mentioned control tonequality can be produced control signal to tonequality control chip 70 by the game port (game port) 54 in the south bridge control chip 50.Clock CLK pin 1 and data DATA pin 28 that data-signal that is transmitted via game port 54 and clock signal then input to tonequality control chip 70 are used and are finished tone control circuit able to programme on the motherboard of the present invention.

Fig. 5 a, 5b, 5c and 5d are the pin figure of preferred embodiment of the present invention actual pin on motherboard.The W10 pin (SDD0/BITCLK) of south bridge control chip 50, V17 pin (SDD1/SDIN), V16 pin (SDD3/SYNC), Y16 pin (SDD4/SDOUT) and Y15 pin (SDD5/-ACRST) are coupled to the 6th pin (BIT CLK), the 8th pin (SDATA IN), the 10th pin (SYNC), the 5th pin (SDATA OUT) and the 11st pin (RESET) of codec 60.

The 36th pin of codec 60 (LINE OUT R) and the 35th pin (LINE OUT L) are coupled to the 25th pin (LINEOUTR) and the 4th pin (LINEOUTL) of tonequality control chip 70.

The Y18 pin (SDD14/MS0) of game port, Y19 pin (SDD15/MS1) and T14 pin (GP10A/GP10B) are coupled to the 1st pin (MS0), the 28th pin (MS1) and the 27th pin (GP10A) of tonequality control chip 70 on the south bridge control chip 50.

At last, the 13rd pin (LOUT) of tonequality control chip 70 and the 16th pin (ROUT) are coupled to the 2nd pin (LOUT) and the 6th pin (ROUT) of amplifier (TPA122/LM4880M) 80.The 1st pin (OUTA) of amplifier 80 and the 7th pin (OUTB) are the sound source wire of output.

Therefore, advantage of the present invention is the tone control circuit able to programme that proposes on a kind of motherboard, and the tonequality control chip is coupled between the codec and amplifier on the motherboard, in order to change various audio frequencies, reaches the control of various effects.

But another advantage of the present invention provides the journey tone control circuit on a kind of motherboard, utilizes the tonequality control chip to change the control that various audio frequencies are reached various effects, and reduces the load of CPU, improves the treatment effeciency of CPU.

In sum; though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking the accompanying Claim book person of defining.

Claims

1. the tone control circuit able to programme on the motherboard comprises:

One codec is in order to produce a plurality of sound source signals;

One tonequality control chip is coupled to this codec, in order to receiving those sound source signals, and via a clock signal and data-signal control tonequality, produces a plurality of output signals;

One amplifier is coupled to this tonequality control chip, in order to receiving those output signals, and amplifies those output signals; And

One control port is coupled to this tonequality control chip, in order to produce this clock signal and this data-signal of control tonequality.

2. tone control circuit able to programme as claimed in claim 1, wherein this control port is a game port.

3. tone control circuit able to programme as claimed in claim 1, wherein this tonequality control chip is a LMC1982 chip.

4. the tone control circuit able to programme on the motherboard comprises:

One control chip, this control chip comprise a controller and a control port;

One codec is coupled to this controller of this control chip, in order to produce a plurality of sound source signals;

One tonequality control chip, this tonequality control chip is coupled to this codec, in order to receive those sound source signals, this tonequality control chip is coupled to this control port of this control chip, and receive the tonequality that a clock signal and a data-signal are controlled those sound source signals, produce a plurality of output signals; And

One amplifier is coupled to this tonequality control chip, in order to receiving those output signals, and amplifies those output signals.

5. tone control circuit able to programme as claimed in claim 4, wherein this control chip is a south bridge control chip.

6. tone control circuit able to programme as claimed in claim 4, wherein this controller is an AC97 controller.

7. tone control circuit able to programme as claimed in claim 4, wherein this control port is a game port.

8 tone control circuits able to programme as claimed in claim 4, wherein this tonequality control chip is a LMC1982 chip.