Figure 1 (IMAGE)
Caption
Circuit diagrams of a conventional probabilistic bit (p-bit) (a) and the proposed DAC-free p-bit. "X" denotes a device whose state fluctuates probabilistically; in this work, it is implemented using a stochastic magnetic tunnel junction whose magnetization direction thermally fluctuates. In the conventional p-bit (a), an analog circuit, namely a digital-to-analog converter (DAC), is required to convert digital input signals into analog ones. In contrast, the proposed p-bit (b) can be constructed solely with digital circuits, such as delay circuits, which facilitate large-scale probabilistic computing hardware.
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©Shunsuke Fukami, Kerem Camsari et al.
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