Patent ID: 8872597

Claim:
An equalizer for compensating for transmission loss of electronic communication signals, comprising: a circuit board configured to transmit the electronic communication signals; and a compensation module mounted in and electrically connected to the circuit board; wherein the compensation module comprises first and second transmission lines, first to fourth resistors, first to fourth vias, and first to fourth micro-strips; the first and second transmission lines, the first to fourth resistors, and the first to fourth micro-strips are mounted on an outer surface of a signal layer of the circuit board, the first to fourth vias extend through the circuit board and are electrically connected to a ground layer of the circuit board; first terminals of the first to fourth resistors are electrically connected to the ground layer through the first to fourth vias respectively, a second terminal of the first resistor is electrically connected to a second terminal of the second resistor through the first micro-strip, the second terminal of the second resistor is further electrically connected to the first transmission line through the second micro-strip, a second terminal of the third resistor is electrically connected to the second transmission line through the third micro-strip, the second terminal of the third resistor is further electrically connected to a second terminal of the fourth resistor through the fourth micro-strip; a length of the first micro-strip is equal to a length of the fourth micro-strip, a length of the second micro-strip is equal to a length of the third micro-strip.