DIFFERENTIAL PAIR SIGNAL LINES MATCHING CIRCUIT

Abstract

A differential pair signal lines matching circuit includes a pair of differential pair signal lines coupled to a receiver, a first terminal resistor, a second terminal resistor, and a capacitor. The first terminal resistor is coupled at one end to one of the differential pair signal lines near the receiver. The second terminal resistor is coupled at one end to another one of the differential pair signal lines near the receiver. The capacitor is coupled between the other ends of the first terminal resistor and the second terminal resistor. The differential pair matching circuit eliminates noise and non-monotonic glitches of a signal transmitted on differential pair signal lines without influencing a signal voltage thereof.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a circuit diagram of one embodiment of a differential pair signal lines matching circuit in accordance with the present invention;

FIG. 2 is a circuit diagram of a conventional differential pair signal lines matching circuit; and

FIG. 3 is a circuit diagram of another conventional differential pair signal lines matching circuit.

Claims

1. A differential pair signal lines matching circuit comprising: a pair of differential pair signal lines coupled to a receiver;a first terminal resistor having an end connected to one of the differential pair signal lines near the receiver;a second terminal resistor having an end connected to another one of the differential pair signal lines near the receiver; anda capacitor coupled between other ends of the first terminal resistor and the second terminal resistor.

2. The differential pair signal lines matching circuit as claimed in claim 1, wherein the first terminal resistor and the second terminal resistor have a same distance to the receiver.

3. The differential pair signal lines matching circuit as claimed in claim 1, wherein the first terminal resistor and the second terminal resistor have a same resistance, and a sum of the resistances of the first terminal resistor and the second terminal resistor matches a sum of resistances of the differential pair signal lines.