---
license: mit
tags:
- pytorch
- safetensors
- threshold-logic
- neuromorphic
- sequential
- lfsr
- prng
---

# threshold-lfsr

4-bit Linear Feedback Shift Register with maximal-length polynomial x^4 + x + 1.

## Circuit

```
        ┌───────────────────┐
        │                   │
        ▼                   │
[XOR] ──► [Q3] ──► [Q2] ──► [Q1] ──► [Q0]
  ▲                                   │
  └───────────────────────────────────┘

Feedback = Q3 XOR Q0
```

## Sequence

Period = 2^4 - 1 = 15 (all non-zero states)

## Applications

- Pseudo-random number generation
- Built-in self-test (BIST)
- Scrambling/descrambling
- CRC computation

## Parameters

| | |
|---|---|
| Inputs | 4 |
| Outputs | 4 |
| Neurons | 6 |
| Parameters | 30 |
| Magnitude | 14 |

## License

MIT