threshold-2to4decoder

2-to-4 binary decoder. Converts 2-bit input to one-hot 4-bit output.

Function

decode(A1, A0) -> [Y0, Y1, Y2, Y3]

Yi = 1 iff input = i

Truth Table

A1	A0	Y0	Y1	Y2	Y3
0	0	1	0	0	0
0	1	0	1	0	0
1	0	0	0	1	0
1	1	0	0	0	1

Architecture

Single layer with 4 neurons. Each Yi matches pattern i.

Output	Weights [A1, A0]	Bias
Y0	[-1, -1]	0
Y1	[-1, +1]	-1
Y2	[+1, -1]	-1
Y3	[+1, +1]	-2

Parameters

Inputs	2
Outputs	4
Neurons	4
Layers	1
Parameters	12
Magnitude	12

Usage

from safetensors.torch import load_file
import torch

w = load_file('model.safetensors')

def decode2to4(a1, a0):
    inp = torch.tensor([float(a1), float(a0)])
    return [int((inp * w[f'y{i}.weight']).sum() + w[f'y{i}.bias'] >= 0) for i in range(4)]

print(decode2to4(1, 0))  # [0, 0, 1, 0] - input 2

License

MIT