Title :
`R-lens filter´: An (RC)n current-mode lowpass filter
Author :
Bertuccio, G. ; Gallina, P. ; Sampietro, M.
Author_Institution :
Dipartimento di Elettronica e Inf., Politecnico di Milano, Italy
fDate :
7/22/1999 12:00:00 AM
Abstract :
A continuous-time (RC)n lowpass filter is presented that can be fully integrated with cutoff frequency down to the 0.1 MHz range. The circuit is based on a cascade of new compact RC-cells that provides current amplification and filtering with minimum power dissipation (<15 μW/pole) using a single supply voltage (2 V). The high value resistance of the RC-cell is obtained by means of a current conveyor feedback that de-magnifies the signal current flowing in a small physical resistor. The circuit is intrinsically low-noise due to a `cooling effect´ in the equivalent resistor
Keywords :
RC circuits; cascade networks; circuit feedback; continuous time filters; current conveyors; current-mode circuits; low-pass filters; 0.1 MHz; 15 muW; 2 V; R-lens filter; cascadability; continuous-time (RC)n current-mode low-pass filter; cooling effect; current amplification; current conveyor feedback; equivalent resistor;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990842
