There is disclosed a mixed mode equalization system for use in a transceiver
capable of operating in a high frequency Ethernet local area network (LAN). The
mixed mode equalization system comprises: 1) an adaptive analog equalization filter
for amplifying a first high frequency component of an incoming analog signal by
a first adjustable gain factor to produce an analog filtered incoming signal; 2)
an analog-to-digital converter (ADC) for converting the analog filter incoming
signal to a first incoming digital signal; 3) a digital finite impulse response
(FIR) filter for amplifying a second high frequency component of the first incoming
digital signal factor to produce a digital filtered incoming signal; 4) a digital
FIR controller for modifying at least one digital filter coefficient of the digital
FIR filter according to a signal error associated with a digital output of the
digital FIR filter; and 5) an analog equalization controller for modifying the
first adjustable gain factor associated with the adaptive analog equalization filter
according to a value of the at least one digital filter coefficient.