JP2003345481A - Electronic device and circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board and an electronic device that facilitate connection between different boards carrying out signal transmission at different signaling speeds and allows signal reliability to be enhanced. <P>SOLUTION: A USB controller 12 controlling USB2.0 as a high speed signal and a bridge circuit 14 controlling an ISA bus as a low speed signal are provided on a main board 11. Connectors 13, 17 for transmitting and receiving USB2.0 data and connectors 15, 18 for transmitting and receiving ISA data are provided to enable signal transmission to an expansion board connected electrically to the main board 11. These connectors are provided according to the applicable transmission rate, which prevents signal interference or the like and improves signal reliability. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a substrate in an electronic device, and more particularly to a substrate and an electronic device capable of connecting signal lines having a plurality of transmission speeds.

[0002]

2. Description of the Related Art In recent years, an electronic device represented by a notebook personal computer (hereinafter, referred to as a personal computer) has various modules and semiconductor circuits provided on a substrate in the device. These modules and semiconductor circuits are provided on a plurality of substrates, respectively, and connectors such as stacking connectors are used to connect the substrates. However, in recent years, various signal lines are provided on a board, and the number of connection signals and the number of power supplies are increased, the number of the stacking connectors is increased, and it is necessary to provide a plurality of stacking connectors or use a stacking connector and a cable together. There are things.

For this reason, a low-speed signal (power supply or ISA bus) and a high-speed signal (USB (Universal Se
real bus 2.0 and serial ATA) are mixed in the same stacking connector.

[0004]

In the above prior art,
Signal lines for transmitting signals at various speeds are mixed in one connector. In such a connector, the flow path of the current is shared, which has an effect on signal transmission. In high-speed signals, the return path (usually flowing to ground) is important to ensure signal transmission quality, but the ground is shared with other low-speed signals, and the impedance characteristics of signal transmission change. However, there is a problem that it is easily affected by noise.

[0005] In addition, connectors that enable high-speed transmission include:
It is more expensive than a connector that transmits general low-speed signals. If such a connector for high-speed transmission is provided with terminals for low-speed signals and a connector that can transmit multiple signal speeds is used, the cost of the connector There was a problem that it became high.

In order to solve the above-mentioned problems, the present invention provides a board and an electronic device which can facilitate connection between boards performing signal transmission at various speeds and improve signal reliability. With the goal.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a housing, a first substrate provided inside the housing, and a first substrate provided on the first substrate are provided. ,
A first electronic component for transmitting and receiving first data at a first data rate, and transmitting and receiving second data at a second data rate that is provided on the first substrate and that is lower than the first data rate. A second electronic component, a second substrate electrically connected to the first substrate, the first substrate and the second substrate.
A first connection unit that electrically connects the first substrate and the first data, and that serves as a transmission / reception path for the first data;
And a second connection portion that electrically connects the second substrate to the second substrate and serves as a transmission / reception path for the second data.

[0008] With this configuration, it is possible to provide an electronic device that is less affected by other signals and can improve the reliability of data transmission.

In the invention according to a second aspect, the first electronic component for transmitting and receiving data at the first signal transmission speed and the second electronic component for transmitting and receiving data at the second signal transmission speed lower than the first signal transmission speed. A first circuit board including the first electronic component, and a first circuit board electrically connected to the first circuit board and capable of transmitting and receiving data at the same transmission speed as the first electronic component. A third electronic component and a fourth electronic component capable of transmitting and receiving data at the same transmission speed as the second electronic component.
Connection part capable of electrically connecting the first electronic component to the third electronic component, the second electronic component, and the second electronic component, and the second electronic component and the fourth electronic component. And a second connection part capable of electrically connecting the second and the third connection parts.

With such a configuration, it is possible to provide an electronic device which is less affected by other signals and which can improve the reliability of data transmission.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a personal computer according to the first embodiment.

The personal computer 1 has a main body case 2, a display case 3, an LCD 4, and a keyboard 5. The main body case 2 has a keyboard 5 on its upper surface. The main body case 2 and the display unit case 3 are rotatably connected by a hinge 6. The display unit case 3 holds the periphery of the LCD 4 so that the display area of the LCD 4 is visible. The display unit case 3 is provided with an arrow AB through the hinge 6.
The keyboard 5 is rotatable between a closed position that covers the keyboard 5 and an open position that makes the keyboard 5 usable. The LCD 4 maintains the brightness by a backlight (fluorescent means, not shown) built in the display unit case,
The display is performed.

A main circuit board (hereinafter, referred to as a main board) 11 for mounting various circuits, semiconductor elements, modules and the like of the personal computer is provided in the main body case 2. The main board is connected to a board composed of various modules, a board equipped with several types of functions, and the like.

Next, FIG. 2 shows a configuration diagram of the substrate according to the first embodiment.

The main board 11 is provided with various semiconductor elements, and is provided with a USB controller 12 for controlling a high-speed signal USB 2.0 and a first connector 13 connected to the USB controller. .

A bridge circuit 14 for controlling an ISA bus, which is a low-speed signal, and a second connector 15 connected to the bridge circuit 14 are provided.

The extension board 16 connected to these connectors is provided with a third connector 17 connected to the first connector 13 and a fourth connector 18 connected to the second connector 15. .

A semiconductor circuit 19 connected to the third connector 17 and a USB
A USB connector unit 20 serving as a cable connection port is provided. The fourth connector has an IS connected to the ISA bus.
The A device 21 is connected.

FIG. 3 shows the shapes of the first connector and the third connector.

The first connector and the third connector are connectors in consideration of a high-speed signal, and are formed, for example, in a microstrip shape. This is provided with a GND 23 outside the row in which the signal contacts 22 are arranged, and is designed so as to obtain a specific impedance. Since each signal contact has a reference as a ground, signal reliability is high.
With such a connector, the effects of rising and falling edges of high-speed signals and noise are minimized.

On the other hand, the second connector 15 and the fourth connector 18 are connectors that do not take high-speed transmission signals into account and do not perform the impedance management as described above, and the contact portion is located in a space. It is a connector that is exposed.

When transmitting a high-speed signal using such a connector, since impedance management is not performed, the connector is susceptible to signal noise and is not suitable for high-speed transmission.

In the first embodiment, when connecting boards having elements having different speeds, when the signal propagation speed is different, when connecting the board to the board, a connector for connecting each signal is provided. As a result, it is possible to achieve signal stability and reliability, and it is not necessary to multiply the connector, and the connector can be designed with an inexpensive connector configuration. Next, the second
The embodiment will be described.

FIG. 4 shows a configuration diagram of a substrate according to the second embodiment.

The main board 31 is provided with various semiconductor elements, and controls a high-speed signal USB 2.0.
The SB controller 34 and the USB controller 32
A USB connector 33 is provided.

Further, a bridge circuit 34 for controlling the ISA bus, which is a low-speed signal, and a low-speed signal connector 35 connected to the bridge circuit 34 are provided.

The expansion board 36 connected to these connectors is provided with a USB connector section 37, which is connected to a USB connector 33 provided on the main board 31 via a USB cable 38. This USB connector part 3
Reference numeral 7 is formed in a rectangular shape, and is provided with two connector portions to which a USB cable can be connected. A USB connector 39 is provided on one side, and the USB connector 39 and the USB connector 33 of the main board 31 are connected to the USB cable 3.
8 are connected. The USB connector 37
Is further provided with a USB connector 40, which is exposed on the side wall of the personal computer 1,
This is a connector that can be connected to an external device via a USB connector.

The extension board 36 is provided with a connector 41 connected to the low-speed signal connector 35, and the functional module 4 connected to the ISA bus via this connector.
2 are connected.

As described above, when transmitting a high-speed signal,
By connecting the elements between the two boards via a dedicated cable, the reliability of high-speed signal data transmission is improved.

In the second embodiment, signals for transmitting high-speed signals are connected by cables. Conversely, cables for transmitting low-speed signals may be used.

As described above, in the second embodiment, one of the signal transmissions can be connected using a dedicated cable, and the high-speed signal and the low-speed signal can be connected while increasing the flexibility of system design. Is connected by different interfaces, it is possible to increase the reliability of data transfer.

The present invention is not limited to the above-described embodiment, and can be variously modified in a practical stage without departing from the paper.

[0034]

According to the invention described in detail above, when elements having a plurality of signal transmission speeds are connected on a substrate, they are affected by other signals by connecting according to each signal. Thus, it is possible to provide a substrate and an electronic device capable of performing highly reliable data transfer with less trouble.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view of an electronic apparatus according to a first embodiment;

FIG. 2 is a configuration diagram of a substrate according to the first embodiment.

FIG. 3 is a perspective view of a connector for high-speed signals according to the first embodiment.

FIG. 4 is a configuration diagram of a substrate according to the first embodiment.

[Explanation of symbols]

1 ... PC 2. Body case 3. Display case 4: LCD panel 5 ... Keyboard 6 ... Hinges 7 Open / close detection member 11, 31 ... main board 12 ... USB controller 13: first connector 14… ISA bus bridge 15 Second connector 16, 36 ... Expansion board 17: Third connector 18. Fourth connector 19 ... Semiconductor circuit 20… USB connector 21… ISA device

Claims (6)

[Claims] 1. A housing, and a first housing provided inside the housing.
A first electronic component provided on the first substrate and the first substrate for transmitting and receiving first data at a first data rate; and a first electronic component provided on the first substrate and slower than the first data rate A second electronic component for transmitting and receiving second data at a second data rate; and a second electronic component electrically connected to the first substrate.
Board, a first connection portion that electrically connects the first board and the second board, and serves as a transmission / reception path for the first data, and a first connection section between the first board and the second board. A second connection portion that electrically connects to a substrate and serves as a transmission / reception path for the second data. 2. A first electronic component for transmitting and receiving data at a first signal transmission speed, and a second electronic component which is slower than the first signal transmission speed.
A second electronic component that transmits and receives data at a signal transmission speed of
A first circuit board comprising: a third electronic component electrically connected to the first circuit board and capable of transmitting and receiving data at the same transmission speed as the first electronic component;
A second circuit board including a fourth electronic component capable of transmitting and receiving data at the same transmission speed as the second electronic component, and a first electronic component and a third electronic component are electrically connected to each other. An electronic device, comprising: a first connection portion capable of electrically connecting the first electronic component; and a second connection portion capable of electrically connecting the second electronic component to the fourth electronic component. 3. The first connection section and the second connection section,
2. A stacking connector according to claim 1, wherein said connector is a stacking connector.
Or the electronic device according to 2. 4. The electronic apparatus according to claim 1, wherein the first connection section is a dedicated signal cable. 5. The electronic device according to claim 1, wherein the second connection unit is a dedicated signal cable. 6. A first electronic component for transmitting and receiving data at a first signal transmission speed, and a second electronic component which is slower than said first signal transmission speed.
A second electronic component that transmits and receives data at a signal transmission speed of
A first circuit board comprising: a third electronic component electrically connected to the first circuit board and capable of transmitting and receiving data at the same transmission speed as the first electronic component;
A second circuit board including a fourth electronic component capable of transmitting and receiving data at the same transmission speed as the second electronic component, and a first electronic component and a third electronic component are electrically connected to each other. A circuit board, comprising: a first connection portion capable of being electrically connected; and a second connection portion capable of electrically connecting a second electronic component and a fourth electronic component.