# Design Documentation for sg13g2_o21ai_1

## Substrate
```
  012345678
4 SSSSSSSSS
3 NNNNNNNNN
2 NNNNNNNNN
1 NNNNNNNNN
0 NNNNNNNNN
9 NNNNNNNNN
8 NNNNNNNNN
7 NNNNNNNNN
6 SSSSSSSSS
5 SSSSSSSSS
4 SSSSSSSSS
3 SSSSSSSSS
2 SSSSSSSSS
1 SSSSSSSSS
0 NNNNNNNNN
```
Legend: N=N-Well, S=Substrate

## Active
```
  012345678
4 ppppppppp
3
2 ppppppp
1 ppppppp
0 ppppppp
9 ppppppp
8 ppppppp
7
6
5
4 nnnnnnn
3 nnnnnnn
2 nnnnnnn
1
0 nnnnnnnnn
```
Legend: n=NMOS Active, p=PMOS Active

## Polysilicon
```
  012345678
4
3
2
1
0
9
8
7  G G G
6
5      G
4      G
3      G
2      G
1
0
```
Legend: G=Polysilicon

## Metal 1
```
  012345678
4 &+&+&+&+&
3 +     C
2 +c  OcCc
1 +   O C
0 +c  OcCc
9 +   OOOO
8        O
7  I I I O
6  i i i O
5        O
4 CcCCCcOo
3 C - C OO
2  c-c c c
1   -
0 _-_-_-_-_
```
Legend: +/&=VDD, -/_=VSS, I/i=Metal 1 Input, O/o=Metal 1 Output, c/i/o/&/_=Contacted metal (lowercase)

## Connectivity Matrix

| Silicon | VDD | VSS | Internal1 | Internal3 | Internal4 | Output1 |
| --- | --- | --- | --- | --- | --- | --- |
| NMOS1 |   | X |   |   |   |   |
| NMOS2 |   | X | X | X | X |   |
| PMOS1 | X |   |   |   |   | X |
| PMOS2 | X |   |   |   |   |   |
| Poly1 |   |   | X | X |   |   |
| Poly2 |   |   |   |   |   |   |
| Poly3 |   |   |   |   |   |   |
| Poly4 |   |   |   |   |   |   |

## Silicon Neighbourhood

| Silicon | Poly1 | Poly2 | Poly3 | Poly4 |
| --- | --- | --- | --- | --- |
| NMOS1 |   |   |   |   |
| NMOS2 | O |   |   |   |
| PMOS1 |   | S | S | S |
| PMOS2 |   |   |   |   |