SIGNAL TRANSMITTING CIRCUIT

Abstract

A signal transmitting circuit includes a driving circuit, and a plurality of receiving circuits receiving signals transmitted from the driving circuit. Each of the receiving circuits is coupled to the driving circuit consecutively via a transmission line. A filter means is coupled with a segment of the transmission line of two neighboring receiving circuits for filtering signal reflections from the receiving circuits.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a signal transmitting circuit in accordance with a first preferred embodiment of the present invention;

FIG. 2 is a block diagram of a signal transmitting circuit in accordance with a second preferred embodiment of the present invention; and

FIG. 3 is a block diagram of a conventional signal transmitting circuit coupling a north bridge chipset to four memory slots.

Claims

1. A signal transmitting circuit comprising: a driving circuit;a plurality of receiving circuits receiving signals transmitted from the driving circuit, each of the receiving circuits coupled to the driving circuit consecutively via a transmission line; anda filter means coupled with a segment of the transmission line of two neighboring receiving circuits for filtering signal reflections from the receiving circuits.

2. The signal transmitting circuit as claimed in claim 1, wherein the filter means comprises a capacitor connected between said segment of the transmission line and a ground.

3. The signal transmitting circuit as claimed in claim 1, wherein the filter means comprises an inductor connected in series with said segment of the transmission line.

4. The signal transmitting circuit as claimed in claim 1, wherein the driving circuit comprises a north bridge chipset.

5. The signal transmitting circuit as claimed in claim 1, wherein the plurality of receiving circuits comprises four memory slots.

6. A layout method within a printed circuit board (PCB) comprising the steps of: setting a driving circuit and a plurality of receiving circuits on the PCB;coupling the driving circuit to the receiving circuits via a transmission line; andcoupling a filter means between a segment of the transmission line of two neighboring receiving circuits for filtering signal reflections from the receiving circuits.

7. The layout method as claimed in claim 6, wherein the filter means comprises a capacitor connected between said segment of the transmission line and a ground.

8. The layout method as claimed in claim 6, wherein the filter means comprises an inductor connected in series with said segment of the transmission line.

9. The layout method as claimed in claim 6, wherein the driving circuit comprises a north bridge chipset.

10. The layout method as claimed in claim 6, wherein the plurality of receiving circuits comprises four memory slots.

11. A signal transmitting circuit comprising: a driving circuit for generating signals;a transmission line electrically connectable with said driving circuit for transmitting said signals out of said driving circuit, and extending away from said driving circuit;a plurality of receiving circuits serially electrically connectable with said transmission line respectively to interchange said signals with said driving circuit through said transmission line; anda filter means electrically connectable with said transmission line to filter noise of said signals transmitted along said transmission line, said signals from said driving circuit passably reaching at least one of said plurality of receiving circuits prior to said filter means.

12. The signal transmitting circuit as claimed in claim 11, wherein said filter means is electrically connectable to said transmission line between two neighboring ones of said plurality of receiving circuits.