CORRECTION CIRCUIT FOR CONVERTERS

摘要

An error correction circuit for an analog-to-digital converter is shown wherein and analog-to-digital converter includes a counter-and-storage circuit that stores an analog input signal in the form of a preliminary digital signal. An error sample-and-hold circuit receives an error signal, including switching and offset errors, generated by the analog-to-digital converter and stores that signal while the switching and offset errors are removed therefrom. The resulting signal is then applied to a second analog-to-digital converter where it is converted to a digital error signal which is applied to the counter circuit. The counter removes the digital error signal from the stored preliminary digital signal and stores the final corrected digital signal within the storage circuit. This error correction circuit does not cause an increased quantization error while removing the switching and offset errors from the input signal.