KR20030079403A - Ground disjuncted structure and method of telematic apparatus - Google Patents

Abstract

PURPOSE: A structure and method for separating grounds in a telematic terminal is provided to remove mutual interference and improve the performance by separating each layer, such as a GPS, a CPU, a wireless modem, a power supply block, a control block, etc., into grounds. CONSTITUTION: The second layer in a telematic terminal board consists of a substrate(51), ground patterns(52), and a connection pattern(53). The ground patterns(52) are formed separately according to related circuit parts. The separated ground patterns(52) are connected by a line pattern so widely formed as to exclude signal leakage. The connection pattern(53) connects each of the ground patterns(52). As one of the ground patterns(52) is grounded, the ground patterns(52) can execute their respective functions smoothly.

Description

GROUND DISJUNCTED STRUCTURE AND METHOD OF TELEMATIC APPARATUS}

The present invention relates to a telematic terminal in which a wireless signal processing unit and a digital signal processing unit are combined. More specifically, the GPS, CPU, wireless modem, power supply, and control terminals are separated to ground to eliminate mutual interference. And a ground separation structure and method of a telematic terminal for improving performance.

1 is a block diagram illustrating an example of a telematic terminal applied to an automobile navigation apparatus. The GPS front end unit 1 receives a GPS signal, extracts position and time data, and tracks a position. The control unit 2 controls the entire function while the current position is determined based on the GPS data processed by the GPS front end unit 1 and voice guidance is performed accordingly, so that data can be transmitted and received via a CDMA wireless signal. A CDMA modem 3, a speech combination unit 4 for combining sentences stored under the control of the controller 2 to form a sentence, and outputting the formed sentence as speech; 5), an audio amplifier 6 which amplifies the speech signal combined by the speech combination unit 4 and applies it to a speaker, and the speed, engine check and control are applied by the controller 2. I / O front end unit 7 for inputting and outputting a signal, a power supply control unit 8 for controlling power under the control of the control unit 2, and a predetermined operating power supply under the control of the power control unit 8 A power supply 9 for supplying (5V, 3.3V, 3V, 2.5V) is included.

As described above, the telematic terminal includes a GPS receiver module, a CPU (D-RAM, a flash memory, a microcomputer), a power supply terminal, a wireless modem, to process satellite signals in several tens of GHz bands, wireless signals in MHz bands, and digital data. Various parts such as voice combination IC are used.

At this time, the GPS signal, which is an analog signal, or the wireless signal of the CDMA modem may adversely affect the digital processing means, and may cause mutual interference to degrade the performance of the telematic terminal.

However, in the related art, there is a problem in that the telematic terminal is configured without considering such a point.

The present invention has been proposed to solve the above-described problems, and its purpose is to separate each stage such as GPS, CPU, wireless modem, power stage, and control stage to ground to eliminate mutual interference and improve performance. To provide a ground separation structure and method of a telematic terminal.

1 is a block diagram showing a general configuration of a telematic terminal.

Figure 2 is a photograph showing the front configuration of the telematic terminal board implemented by the present invention.

Figure 3 is a photograph showing the rear configuration of the telematic terminal board implemented by the present invention.

Figure 4 is a side configuration diagram of a telematic terminal board implemented by the present invention.

Figure 5 is a schematic diagram showing a ground layer of the telematic terminal board implemented by the present invention.

* Description of the symbols for the main parts of the drawings *

40: parts

41 to 46: 1st to 6th floor

51: substrate

52: ground pattern

53: connection pattern

As a construction means for achieving the object of the present invention described above, the present invention is a telematic terminal including a GPS receiver, a voice combination unit, a wireless modem, a power supply unit, a control unit, GPS receiver, voice combination unit, wireless modem, The ground patterns of the power supply unit and the control unit are separated from each other, and the separated ground patterns are connected by a predetermined line.

In addition, the present invention is a telematic terminal including a GPS receiver, a voice combination unit, a wireless modem, a power supply unit, a control unit formed of a multi-layer substrate,

Form one or more first layers where relevant parts are mounted so that the circuits are organized by functions such as GPS reception, voice combination function, wireless modem, power supply, and control.

At least one second layer having a plurality of ground patterns formed to correspond to each functional unit formed in the first layer is formed and stacked.

In addition, the plurality of ground patterns of the second layer may be connected to each other by a line pattern having a predetermined width.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the configuration and operation of the present invention.

2 and 3 are photographs showing the front and rear surfaces of the telematic terminal board implemented according to the present invention, respectively, and divided the ground by the black line.

In FIG. 2, reference numerals 21 and 22 are connectors, 23 is a power supply terminal, 24 is an audio amplifier, 25 is a wireless modem, 26 is a flash memory, 27 is a microcomputer, and 28 is a GPS receiver. , 29 is a GYRO element. In FIG. 3, reference numeral 31 denotes a power terminal disposed on a rear surface facing the front power terminal 23, 32 is a clock connected to the microcomputer 27, and 33 is a GPS receiver 28 on the front surface. The GPS receiver is a part facing the, 35 is a UART, 36 is a voice combination unit, 37 is an output driver, and 38 represents a sensor input part to which signals from multiple sensors are input.

As described above, the circuit parts formed on the front surface of the telematic terminal board are divided by functions as described above to separate the ground.

Similarly, the circuit on the back side separates the circuits by functions as shown and separates the ground of each part.

4 is a side view of a telematic terminal board implemented according to the present invention as described above, wherein the board is composed of a multi-layered substrate, the first layer 41 and the sixth layer 46 which are the top layer and the bottom layer. ), A circuit is formed by mounting a component, and a ground pattern is formed on the second layer 42, and a horizontal line pattern is formed on the third layer 43 and the fourth layer 44 at a predetermined interval. A vertical line pattern is formed and used as a signal line connecting the components of the first layer 41 and the sixth layer 46. In addition, a pattern for forming a power line is formed in the fifth layer 45.

In the above, the ground pattern of the second layer 42 is formed separately to correspond to each of the circuits formed in the first layer 41 and the fifth layer 46 by function.

FIG. 5 is a diagram illustrating an example of the second layer 42, wherein 51 is a substrate, 52 is a ground pattern, and 53 is a connection pattern connecting the respective ground patterns.

In the above, the associated ground patterns 52 are separately formed for each circuit unit, and the separated ground patterns 52 are connected in lines wide enough to prevent signal leakage. Therefore, when one of the ground patterns 52 is connected to the ground, the separated ground patterns 52 formed on the second layer 42 can perform their functions.

As described above, the present invention by separating the ground of the circuits for performing different functions in the telematic terminal that requires a variety of functions, such as GPS reception, wireless transmission and reception, digital data processing, to reduce the mutual influence between the constituent means, As a result, the performance of the product can be further improved.

Claims (3)

In a telematic terminal including a GPS receiver, a voice combination unit, a wireless modem, a power supply unit, and a control unit, GPS ground, voice combination, wireless modem, power supply, and ground pattern of the control unit is formed separately, The ground separation structure of the telematic terminal, characterized in that for connecting the separated plurality of ground patterns in a predetermined line. In the ground separation method of the telematic terminal formed of a multilayer board including a GPS receiver, a voice combination unit, a wireless modem, a power supply, and a control unit, Forming at least one first layer on which related components are mounted so as to be configured for each function such as GPS reception, voice combination function, wireless modem, power supply, and control; And Forming at least one second layer having a plurality of ground patterns formed to correspond to the respective functional units formed in the first layer; Stacking the first and second layers. The method of claim 2, wherein the ground patterns of the second layer are connected to each other by a line pattern having a predetermined thickness.