An analog-to-digital converter utilizes low-resolution and high-resolution conversion paths for precision voltage measurements. A first conversion made using a comparatively low resolution ADC is used to predict the reference voltage to one input of a null detector that receives the input voltage on...http://www.google.de/patents/US5446371?utm_source=gb-gplus-sharePatent US5446371 - Precision analog-to-digital converter with low-resolution and high-resolution conversion paths
