Patent ID: 7525378

Claim:
A circuit for reducing crosstalk comprising: an input signal unit having a first input terminal and a second input terminal; an amplifier unit having a first input terminal, a second input terminal, a first output terminal, and a second output terminal, said first and second input terminals of said input signal unit connected to said first and second input terminals of said amplifier unit, respectively, said amplifier unit providing amplification to the signals received from said first and second input terminals of said amplifier unit and providing amplified output signals on said first and second output terminals, respectively; a ramp generator unit providing a ramp signal; and a comparator unit having a first comparator and a second comparator, each of said first and second comparators having a signal input terminal, a ramp input terminal, and a signal output terminal, said signal input terminals of said first and second comparators connected to said first and second output terminals of said amplifier unit, respectively, said ramp input terminals of said first and second comparators receiving said ramp signal from said ramp generator unit, said first and second comparators comparing the signals on said signal input terminals and on said ramp input terminals and producing a first Class-D signal and a second Class-D signal on said signal output terminals, respectively; wherein the signals output by said input signal unit and fed to said amplifier unit are controlled by said input signal unit to have different DC bias voltages so that said ramp signal crosses the signals output by said amplifier unit at different times and thereby said first and second Class-D signals output by said first and second comparators have different and separated zero-crossing times.