Matrix multipliers for calculating orthogonal transforms
William E. Engeler, R.D. Baertsch, Jerome J. Tiemann, E. Gasparek, Robert A. King, R. Wasiewicz, J. DeNoon · 1979
The use of MOS transistors and weighted capacitors in a device to calculate the transform of a set of signal samples in 300ns will be discussed. Experimental results for a 16-point Hadamard and an 8-point complex Fourier transform will be given.