Title :
A high gain strategy with positive-feedback gain enhancement technique
Author :
Amourah, M.M. ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
Several new CMOS very high DC-gain amplifiers that use internal positive-feedback techniques are presented. These amplifiers have a controllable gain and don´t require perfect matching of transistors to achieve the high DC gain. An implementation of a sample and hold circuit constructed using one of the proposed amplifiers is described. Simulation results predict a DC gain larger than 100 dB is possible without limiting the speed of the amplifier
Keywords :
CMOS analogue integrated circuits; SPICE; feedback amplifiers; operational amplifiers; sample and hold circuits; 100 dB; CMOS very high DC-gain amplifiers; HSPICE; cascoded amplifiers; controllable gain; high gain strategy; internal positive-feedback techniques; positive-feedback gain enhancement; sample and hold circuit; simulation; Analog circuits; Boosting; Frequency; Impedance; Negative feedback; Operational amplifiers; Performance gain; Switched capacitor circuits; Switching circuits; Switching converters;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921935
