Extended Data Fig. 4: Input modulation modes for MVM. | Nature Electronics

Extended Data Fig. 4: Input modulation modes for MVM.

From: A 64-core mixed-signal in-memory compute chip based on phase-change memory for deep neural network inference

Extended Data Fig. 4

a, Full array read procedure for MVMs showing the connection between ADC, unit-cells, and input modulator switches. Signals PP and PN connect the positive source lines \(S{L}_{1:N}^{+}\) to the positive potential V+ and negative potential V−, respectively. For NP and NN it is vice versa. b, 1-phase modulation mode. Inputs of positive and negative polarity are applied to weights of positive and negative polarity in one modulation cycle TPWM. c, 4-phase modulation mode. Inputs of positive and negative polarity are applied individually to weights of positive and negative polarity in four modulation cycles.

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