ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,499,922, issued on Dec. 16, was assigned to Sandisk Technologies Inc. (Milpitas, Calif.).

"Current source for read of programmable resistance memory cells" was invented by Christopher J. Petti (Mountain View, Calif.), Ward Parkinson (Boise, Idaho), Thomas Trent (Tucson, Ariz.) and James O'Toole (Boise, Idaho).

According to the abstract* released by the U.S. Patent & Trademark Office: "Technology is disclosed for a current source for reading a memory cell having a threshold switching selector. The current source may be operated in a first mode when turning on the threshold switching selector and in a second mode when sensing a voltage across the memory cell. The first mode may allow t...