Enhancing Analog to Digital Converter Resolution Using Oversampling Technique

Successive Approximation Register (SAR) type converters are used in PC plug-in data-acquisition boards or PC external data acquisition systems. They are by far the most popular ADCs in today measurement products. One reason for their popularity is their outstanding linearity which comes from the fact that they usually exploit a 1-bit quantizer. Even with a tri-level quantizer, linearity performance up to 20 bits has been reported.