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Figure 4 | EPJ Quantum Technology

Figure 4

From: A coherent perceptron for all-optical learning

Figure 4

Synapse circuit composed of a programmable amplifier and feedback logic (cf. Section 2.4 ) that implements the perceptron learning feedback ( 3 ) for a single weight. The upper amplifier when biased optimally leads to positive gain whereas the lower amplifier leads to negative gain due to the additional π phase shift.

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