Design of DXT architecture using current switched integrator

This paper describes a sampled analog architecture to compute discrete linear transforms, DXT(X=C/H/S/F), using switched capacitor blocks fed with current samples. The scheme uses matrix representation of any DXT kernel, and multiplies each column of the kernel matrix with the input samples simultaneously, using an array of current scalers. It is shown that current scalers can be used to perform multiplication, suiting the needs of DXT computation. Multiplied columns are then fed to different integrators by means of a cross-switch to perform recursive summation. The proposed current input switched capacitor integrator performs current domain multiplication, which leads to more linear and accurate design as compared to resistor or capacitor based scheme.