Title :
A power efficient MDAC design with correlated double sampling for a 2-step-flash ADC
Author :
Ritter, Rudolf ; Kauffman, John G. ; Ortmanns, Maurits
Author_Institution :
Inst. of Microelectron., Univ. of Ulm, Ulm, Germany
Abstract :
This paper describes implementation issues for high speed 2-step-flash analog-to-digital converters (ADCs) without digital correction. A novel implementation for a multiplying digital-to-analog converter (MDAC) is described, which is a sample-and-hold amplifier, which includes a DAC, residue amplification and correlated double sampling (CDS), thereby omitting two-phase compensation differences. No digital correction is needed because linearity of the 2-step-flash ADC is provided by a capacitor-array matching and CDS prevents missing codes due to offset in the MDAC.
Keywords :
amplifiers; analogue-digital conversion; capacitors; digital-analogue conversion; sample and hold circuits; capacitor-array matching; correlated double sampling; high speed 2-step-flash analog-to-digital converters; multiplying digital-to-analog converter; power efficient MDAC design; residue amplification; sample-and-hold amplifier; Ash; Capacitors; Clocks; Delay; Frequency response; Resistance; Switches;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6271987
