Patent ID: 7126519

Claim:
A system for converting an input signal to an output signal, the system comprising: a first converter having a first performance specification for use with frequencies above a frequency threshold; a second converter having a second performance specification for use with frequencies below the frequency threshold; a frequency multiplexer coupled the first and second converters, wherein the frequency multiplexer comprises: a high-pass crossover filter coupled to the first converter, wherein the high-pass crossover filter is configured to transmit high-frequency components of the input signal to the first converter and to attenuate low-frequency components of the input signal to a predetermined level such that the low-frequency components can be used to correct non-linearity errors introduced by the first converter, wherein the high-frequency components are above the frequency threshold and the low frequency components are below the frequency threshold; a low-pass crossover filter coupled to the second converter, wherein the low-pass crossover filter is configured to transmit the low-frequency components of the input signal to the second converter and to attenuate the high-frequency components of the input signal to a predetermined level such that the high-frequency components can be used to correct non-linearity errors introduced by the second converter; and a combiner coupled the first and second converters, wherein the combiner is configured to combine first and second converted signals received from the first and second converters to form the output signal.