An ultra low power CMOS pA/V transconductor and its application to wavelet filters

Two compact ultra low-power CMOS triode transconductor topologies denoted VLPT-g(m) and Delta-g(m) are proposed. In both circuits, input transistors are kept in the triode region to benefit from the lowest g(m)/I-D ratio. This allows achieving a small-signal transconductance g(m) down to hundreds of pA/V, making such transconductors attractive...