Title :
An offset self-correction sample and hold circuit for precise applications in low voltage CMOS
Author :
Ferreira, Luis Henrique C ; Moreno, Robson L. ; Pimenta, Tales C. ; Filho, C.A.R.
Author_Institution :
Microelectron. Group, Escola Fed. de Engenharia de Itajuba, Brazil
Abstract :
This work describes a new topology for CMOS sample-and-hold circuits, in low voltage, with self-correction of the offset voltage caused by mismatches in the differential input pair of the operational amplifier. The charge injection of the NMOS switches is an important factor and it is minimized in this topology. The results were obtained using the ACCUSIM II simulator on the AMS CMOS 0.8 μm CYE and they reveal the circuit has a reduced error of just 0.03% at the output.
Keywords :
CMOS integrated circuits; circuit CAD; circuit simulation; differential amplifiers; field effect transistor switches; integrated circuit design; integrated circuit modelling; low-power electronics; operational amplifiers; sample and hold circuits; 0.8 micron; CMOS low-voltage offset self-correction precision sample-and-hold circuits; NMOS switch charge injection minimization; circuit output error reduction; offset voltage self-correction; operational amplifier differential input pair mismatches; CMOS technology; Circuit topology; Low voltage; MOS devices; Microelectronics; Operational amplifiers; Sampling methods; Switched capacitor circuits; Switches; Switching circuits;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1115006
