A continuous-time analog moment calculating circuit

A circuit has been developed which performs a continuous time analog computation of the first two moments of a discrete distribution of currents. The circuit is intended for use with tactile sensor arrays and it is assumed that there are currents available which are proportional to the sum of the forces applied to the elements in each column and row. The zeroth moment then corresponds to the total force on the array and the first moments of the row and column sums correspond to the means of the pressure distributions in the two directions. The circuit comprises a canonical cell which is repeated once for each input current (i.e., once for each column or row) and a divider circuit which is used once for each distribution (i.e., one for the row distribution and one for the column distribution). The repeating canonical cell uses only five transistors and can be cascaded to work with an NxM array for any values of N and M.