Analogue to digital converter uses multiple iterations and approximate analogue signal to reduce noise sensitivity

摘要

The analogue to digital converter, A/D, has a subtractor (10) with a signal input (20)and another input coupled to the digital to analogue converter, D/A, (60) receiving input from the successive approximation register, SAR, (50) The difference output of the subtractor is fed to a comparator (30) coupled to the controller (40).