A successive approximation AD converter. A voltage comparator receives an analog input signal and a reference voltage. A successive approximation register receives the voltage comparator output, and a DA converter, connected to the successive approximation register, provides another analog signal to...http://www.google.com.hk/patents/US7129882?utm_source=gb-gplus-share專利 US7129882 - Successive approximation ad converter having pulse noise suppression
