Patent ID: 6480132
Filing Date: 2002-11-12
Classification: H03M

Abstract:
An A/D converter comprising:a reference voltage generating circuit for generating a plurality of reference voltages; a differential amplifier row including a plurality of differential amplifiers for receiving an analog input voltage and said reference voltages, amplifying differential voltages between said analog input voltage and said reference voltages and outputting the resultant; a first sample/hold circuit row including a plurality of first sample/hold circuits for sampling/holding said amplified differential voltages; a second sample/hold circuit row for performing interleaving operations, having a pair of second and third sample/hold circuits connected to said first sample/hold circuits; a first selector row including a plurality of selectors for selecting the output of said second sample/hold circuits and said third sample/hold circuits; a first comparator row including a plurality of comparators for determining a polarity of said amplified differential voltages; and a first encoder for outputting digital code corresponding to the output of said first comparator row.