Distributed current clock for nano-magnetic element array

Abstract

A nano-magnetic element array having a conductive line adjacent to a group of nano-magnetic elements and a multi-level current driver connected to an input node on the conductive line. The current driver is controlled by a pair of voltage clock signals and a voltage reference so as to selectively change the current amount at the input node between a first level that erases the state of the elements, a second level that switches the state of the elements and a third level that maintains the state of the elements. The current driver is further configured so that the transition from the second to the third level is gradual. Optionally, a bias generator can selectively adjust the voltage reference and thereby, the current amount at the input node. Also, optionally, the same voltage clock signal and voltage reference lines can be used to control multiple multi-level current drivers within the array.