Digital selection and analogue amplification coexist in a cortex-inspired silicon circuit

@article{Hahnloser2000DigitalSA,
  title={Digital selection and analogue amplification coexist in a cortex-inspired silicon circuit},
  author={Richard Hans Robert Hahnloser and Rahul Sarpeshkar and Misha A. Mahowald and Rodney J. Douglas and H. Sebastian Seung},
  journal={Nature},
  year={2000},
  volume={405},
  pages={947-951}
}
Digital circuits such as the flip-flop use feedback to achieve multi-stability and nonlinearity to restore signals to logical levels, for example 0 and 1. Analogue feedback circuits are generally designed to operate linearly, so that signals are over a range, and the response is unique. By contrast, the response of cortical circuits to sensory stimulation can be both multistable and graded. We propose that the neocortex combines digital selection of an active set of neurons with analogue… 
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