Patent ID: 7703202

Claim:
A method for manufacturing an equalizer used to compensate a digital signal passed by a transmission line, wherein the digital signal can be presented as a frequency-domain function, the method comprising: measuring a the transmission line scattering-parameter; performing an integration and a differentiation about the transmission line scattering-parameter, the frequency-domain function, an ideal gain, and an equalizer scattering-parameter to get the component impedances of the equalizer; and manufacturing the equalizer circuit with the derived component impedances, wherein the equalizer comprises an inductor and a resistor in series connection, and the equalizer scatterinq-parameter is H equalizer ⁡ ( f ) = 2 ⁢ ( R e + j2π ⁢ ⁢ fL e ) Z 0 + 2 ⁢ ( R e + j2π ⁢ ⁢ fL e ) , in which R e represents the resistance of the resistor, L e represents the inductance of the inductor, and the Z 0 represents the resistance of a load electrically connected to the equalizer.