Mayer, Brown, Rowe & Maw LLP
Analog-digital converter with pipeline folding scheme
Provided is a pipelined folding analog-digital converter, the pipelined folding analog-digital converter comprising: a first sample-and-hold unit that samples and outputs a number of analog input voltages; a reference voltage generator that generates a number of reference voltages; a pre-amplifier that amplifies and outputs a number of values subtracting each reference voltage from the outputs of the first sample-and-hold unit, wherein an offset effect due to asymmetry of the amplifier is eliminated; a first folder that folds and outputs a number of outputs of the pre-amplifier; a second sample-and-hold unit that samples and outputs a number of outputs of the first folder; a second folder that folds and outputs a number of outputs of the second sample-and-hold unit; and a comparator that performs a comparison operation between the outputs of the pre-amplifier and the output values of the second folder to find a digital output value, whereby the offset caused by the device mismatch is removed, so that it is possible to realize a high-resolution analog-digital converter.
Electronics and Telecommunications Research Institute
H
H03M
inventional
Mun Yang Seung Chul Min Hyung
Park Lee Cho