Title :
All digital transistor high gain operational amplifier using positive feedback technique
Author :
Amourah, Mezyad M. ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fDate :
6/24/1905 12:00:00 AM
Abstract :
New all digital-transistor CMOS very high DC-gain amplifiers that use internal positive-feedback technique are presented. These structures don´t require perfect matching of transistors to achieve the very high DC gain, and have a very low gain sensitivity to output swing. An implementation of a sample and hold circuit constructed using one of the proposed amplifiers is described. Special layout pattern is used to cut the parasitic capacitance.
Keywords :
CMOS integrated circuits; capacitance; feedback amplifiers; integrated circuit layout; mixed analogue-digital integrated circuits; operational amplifiers; sample and hold circuits; all digital-transistor CMOS; gain sensitivity; high gain operational amplifier; layout pattern; output swing; parasitic capacitance; positive feedback technique; sample and hold circuit; Analog circuits; Boosting; Frequency; Impedance; Negative feedback; Operational amplifiers; Parasitic capacitance; Performance gain; Switching circuits; Switching converters;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1009937
