Abstract: A hardware Artificial Neural Network (ANN) analog circuit may include one or more interconnected node circuits. At least one such node circuit may include: two or more first analog circuits, each configured to receive a respective input signal, and produce an exponentiation signal representing a calculation of exponentiation of the respective input signal, by a predetermined respective exponent value; a second analog circuit, configured to produce a multiplication signal, representing a product of the exponentiation signals of the two or more first translinear analog circuits; and a third analog circuit, configured to output an activation signal, based on said multiplication signal.

Abstract: A brain stimulation device includes: a threaded head portion; a needle portion connected to the threaded head portion; at least one wireless power source arranged in proximity to the threaded head portion, the at least one wireless power source being configured to generate electrical energy for the brain stimulation device responsive to a wireless power signal being received by the brain stimulation device; and at least one electrode arranged at least partially on an outside surface of the needle portion in electrical communication with the at least one wireless power source, wherein the at least one electrode is configured to transmit an electrical signal responsive to receiving the electrical energy from the at least one wireless power source. A method of using the brain stimulation device is also described.