The same design procedure used for the ZXCT1009 applies to these devices except that there is a greater degree of flexibility in that transconductance can now be user specified. Note that, for devices that allow this, the general form of transconductance is GT = k/RGT where k is a constant that is usually 1 but not always. For example k = 1.2 for the ZXCT1011 and k = 20 for the ZXCT1050.