A low voltage digitally programmable current-mode filter

Abstract

A technique for a low voltage low distortion digitally programmable current-mode continuous-time filter is proposed. The technique of digitally programmable is based on an inherent linear MOST-only current division technique. This technique is used to design a digitally programmable current mirror (DPCM). Then we used the (DPCM) to design a digitally programmable current mode integrator. As an application for the digitally programmable current mode integrator, a digitally programmable analog filter is designed. Both of selectivity and center frequency can be programmed independently. The filter has been simulated using the parameters of 0.8 /spl mu/m CMOS process, and 3volt power supply.