Tiny Tapeout > Tiny Tapeout Chips > Tiny Tapeout 5 > 11 Simple Leaky Integrate and Fire (LIF) Neuron
11 Simple Leaky Integrate and Fire (LIF) Neuron
11 : Simple Leaky Integrate and Fire (LIF) Neuron
- Author: Phillip Marlowe
- Description: Given input current, spike when threshold is reached (also assume any files with the letters LFI should be LIF)
- GitHub repository
- Open in 3D viewer
- Clock: 10000000 Hz
How it works
Based on input current, calculation is made using it and previous membrane potential. If current membrane potential is above pre-set threshold then spike!
How to test
After reset, input some current and see what happens. Should see an increase on output and possibly a spike eventually.
A current input of 100 after 20 cycles should produce a spike.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clk_i is the clock | nu_o is the next membrane potential | msb bit of uio_oe is connected to spike_o |
| 1 | current_i is the current input to the LFI neuron | spike_o is the single bit to show when the neuron is firing | |
| 2 | rst_n is for reset | ||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |