259 Bias Generator
259 : Bias Generator
- Author: Rod Burt
- Description: A test chip for a simple CMOS beta multiplier current source.
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
A test chip to evaluate mismatch of a simple CMOS beta multiplier 1uA current source. Eight identical cells are oriented in one direction and another eight cells are rotated 90 degrees for evaluation.
How to test
All current outputs (i_out) are wired together and brought out on ua[0]. Disable individual cells 0 -> 7 with ui[0] -> ui[7] and cells 8 -> 15 with uio[0] -> uio[7].
External hardware
None
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | disable 0 | disable 8 | |
| 1 | disable 1 | disable 9 | |
| 2 | disable 2 | disable 10 | |
| 3 | disable 3 | disable 11 | |
| 4 | disable 4 | disable 12 | |
| 5 | disable 5 | disable 13 | |
| 6 | disable 6 | disable 14 | |
| 7 | disable 7 | disable 15 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B5 | 11 | i out |