Dynamic element matching

摘要

Apparatus for dynamic element matching overcomes problems associated with noise arising from mismatch errors thereby enabling high quality devices and systems to be made from cheaper, low tolerance components. An input signal has a transfer function applied thereto so as to transform its value. A plurality of predetermined values are accessed from a digital store and are added together. Information derived from the transformed value is compared with the simulation of the predetermined values so as to derive an error signal. The error signal is used to correct signal mismatch.