a device to sense changes in current level almost instantaneously and convert those current levels , almost instantaneously , into voltage levels that may be used by a microprocessor for logical and mathematical operations . this device employs a current conveyer to receive two inputs representing current levels . once a sufficient difference in current levels is detected by the current conveyer , the current from each input is passed to a p - sense amplifier that converts the current to an equivalent voltage level and amplifies that voltage level . thereafter , two outputs are generated reflecting an amplified voltage of the current input .