A neural-type pool arithmetic unit

A neural-type pool arithmetic unit is presented. The implementation of this arithmetic unit is based on the describing equations of neural chemical pools that occur in biological neurons where the concentration of a chemical pool depends on the synthesis (inward current) and degradation (outward current) of the chemical materials. With different arrangements of inward and outward currents, this neural-type arithmetic unit can perform functions such as addition, subtraction, sign inversion, square, and square root on voltages.<<ETX>>