A 5th order Gm-C filter design with wide tuning transconductor

This paper describes a wide tuning range transconductor combining source degeneration, cross-coupled, translinear loop to achieve linearity. The transconductance tuning range is from 220μs to 1050μs with 1V input range and the total harmonic distortion is -50 dB with 0.6 V
_pp
input voltage. And its application to a fifth-order elliptic low-pass Gm-C filter for the front-end RF circuit is presented. In order to transform the passive element circuit into a Gm-C based filter, a GIC flow method has been used. The proposed Gm-C based filter achieves a performance with frequency filtering ranged from 5 MHz to 10 MHz by tuning the transconductance resided in the proposed filter.