Fig. 4: Weighted spin torque nano-oscillator (WSTNO) characterization overview of the input state combinations.
From: Weighted spin torque nano-oscillator system for neuromorphic computing
a–d Measured oscillation power (P) of the WSTNO as a function of the input voltages (V1 and V2) for each possible combination of the non-volatile states of the MRAMs: parallel (P) and anti-parallel (AP). Each figure represents a computation with two analog inputs and one analog output according to (3). The contour of 1 µW output power is shown in red. e–h Analytical prediction of the WSTNO behavior as a function of the two input voltages for each state combination. This prediction is obtained using formula (3) and the characterizations of the individual MRAMs and the STNO.
