Title :
High frequency, precision integrators using current-conveyor compensation techniques
Author :
Makris, C.A. ; Toumazou, C.
Author_Institution :
Dept. of Electr. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
Some basic ideas are presented for the application of current-mode circuits as compensation networks to reduce integrator errors for filter applications. A current-conveyor compensation network is introduced which theoretically results in significant improvements in the gain and phase errors of an integrator. It is shown that the main requirement is for the current conveyor to have a high gain-bandwidth product, and circuits which achieve this are presented. The application of the proposed compensation to integrated continuous-time and switched-capacitor integrators is briefly discussed, and key performance improvements are identified
Keywords :
active filters; integrating circuits; switched capacitor filters; current-conveyor compensation techniques; current-mode circuits; filter applications; gain; gain-bandwidth product; integrated continuous-time; phase errors; precision integrators; switched-capacitor integrators; Capacitors; Current mode circuits; Educational institutions; Equations; Filters; Frequency; Operational amplifiers; Poles and zeros; Q factor; Transfer functions;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112016
