Low-spur low-distortion digital-to-analog converter

A method for converting an input signal to an output signal, the method comprising:

• receiving the input signal;
• transmitting high-frequency components of the input signal to a first converter, wherein the high-frequency components are above a frequency threshold;
• attenuating low-frequency components of the input signal to a predetermined level such that the low-frequency components of dither can be used to correct non-linearity errors introduced by the first converter;
• transmitting the low-frequency components of the input signal to a second converter, wherein the low-frequency components are below the frequency threshold;
• attenuating the high-frequency components of the input signal to a predetermined level such that the high-frequency components of linearization correction and dither can be used to correct non-linearity errors introduced by the second converter;
• converting the high-frequency components to form a first converted signal;
• converting the low-frequency components to form a second converted signal;
• and
• combining the first and second converted signals to form the output signal.

A computer program product tangibly embodied in one or more machine-readable media, the computer program product comprising instructions that cause one or more processing devices to:

• receive an the input signal;
• transmit high-frequency components of the input signal to a first converter, wherein the high-frequency components are above a frequency threshold;
• attenuate low-frequency components of the input signal to a predetermined level such that the low-frequency components of dither can be used to correct non-linearity errors introduced by the first converter;
• transmit the low-frequency components of the input signal to a second converter, wherein the low-frequency components are below the frequency threshold;
• attenuate the high-frequency components of the input signal to a predetermined level such that the high-frequency components of linearization correction and dither can be used to correct non-linearity errors introduced by the second converter;
• convert the high-frequency components to form a first converted signal;
• convert the low-frequency components to form a second converted signal;
• and
• combine the first and second converted signals to form the output signal.