COMMON MODE NOISE REDUCTION CIRCUIT

摘要

A common mode noise reduction circuit includes at least one first input end, at least one second input end, at least one first output end, and at least one second output end. The circuit is further provided with at least one resistor, at least one inductor, and at least one capacitor, symmetrically disposed within the circuit loop defined by the four ends. Common mode noise, after entering the circuit, is transformed into heat by the resistance of the circuit such that the common mode noise is suppressed. Differential mode signals, on the contrary, after entering the circuit, can pass through the circuit with minimum loss.

主权项

1. A common mode noise reduction circuit, comprising:
a first transmission line, including:
a first input end;a first output end;at least one first inductor, disposed between said first input end and said first output end; a second transmission line, including:
a second input end;a second output end;at least one second inductor, disposed between said second input end and said second output end; a first connection line, connected to said first input end and said second input end, and including at least one first two-port element and at least one second two-port element, wherein said first two-port element and said second two-port element are connected in series, and a third inductor is disposed between said first two-port elements and said second two-port elements and connected to a ground end; a second connection line, connected to said first output end and said second output end and including at least one third two-port element and at least one fourth two-port element, wherein said third tow-port elements and said fourth two-port elements are connected in series, and a fourth inductor is disposed between said third two-port elements and said fourth two-port elements and connected to a ground end; and a third connection line, including at least one first resistor and at least one second resistor, wherein said third connection line has one end connected between said first two-port element and said second two-port element and has the other end connected between said third two-port element and said fourth two-port element, and a fifth two-port element is disposed between said first resistor and said second resistor and connected to a ground end; wherein said first two-port element, said second two-port element, said third two-port element, said fourth two-port element, and said fifth two-port element have capacitive characteristics.