Patent ID: 7668236

Claim:
A multi-stage cable equalizer, comprising: a fixed gain device, receiving and compensating an input signal to generate a first output signal, wherein the fixed gain device comprises: a first gain amplifier, amplifying the input signal to generate a first amplified signal; a first fixed filtering device, filtering the input signal to generate a first filtered signal; and a first synthesizing device, synthesizing the first amplified signal and the first filtered signal to generate the first output signal; and an adjustable gain device, serially coupled to said fixed gain device to receive the first output signal, compensating the first output signal to generate a second output signal, wherein the adjustable gain device comprises: a second gain amplifier, amplifying the first output signal to generate a second amplified signal; a second adjustable filtering device, filtering the first output signal to generate a second filtered signal; and a second synthesizing device, synthesizing the second amplified signal and the second filtered signal to generate the second output signal.