1. A memory comprising: a plurality of electrical storage memory elements, each electrical storage memory element being configured to carry a respective storage memory value and coupled to circuitry for repeatedly setting said memory value according to input to the memory; a plurality of conversion elements, each conversion element being coupled to a respective electrical storage memory element for selectively converting the corresponding storage memory value to a current signal; and a current summation element for summing the current signals from each conversion element of the plurality of conversion elements to form an output signal.