Patent ID: 6531931
Filing Date: 2003-03-11
Classification: H04B,H04L

Abstract:
A circuit for equalization of a signal waveform received over a communication system transmission line, comprising:an input biasing circuit which provides a common input signal to two parallel amplifier paths; one parallel path having a wideband, fixed-gain, frequency-independent amplifier stage; the other parallel path having a wideband multiplier amplifier stage in series with a wideband amplifier having a switchable frequency-independent gain characteristic combined with an independently switchable set of high pass gain characteristics; a wideband gain buffer amplifier stage having a first fixed frequency-independent gain characteristic combined with a switchable high pass frequency response characteristic, wherein said wideband gain buffer stage has an input port to which an output port of the wideband, fixed-gain frequency-independent amplifier stage is tied in common with an output port of the wideband amplifier stage; and switches for selecting the frequency characteristics of the wideband amplifier and the wideband gain buffer amplifier to accommodate various predetermined ranges of transmission line lengths.