静态危害发生在组合电路中，可以通过使用冗余门来消除。静电危害分类为：
1. 静电 1 危害：
如果输出当前处于逻辑状态 1，并且在输入更改其状态后，同时输出在稳定为 1 之前变为 0，则它是静态 1 危险。
2. 静电 0 危害：
如果输出当前处于逻辑状态 0 并且在输入更改其状态后，同时输出在稳定为 0 之前变为 1，则它是静态 0 危险。
Static-1 和 Static-0 危害之间的区别：
| STATIC-1 HAZARD | STATIC-0 HAZARD |
|---|---|
| Output changes from 1 to 0. | Output changes from 0 to 1. |
| It is false ‘0’ level for a short interval. | It is false ‘1’ level for a short interval. |
| AND-OR circuit produces static-1 hazard. | NAND-NOR circuit produces static-0 hazard. |
| The graph goes from high to low then again high. | The graph goes from low to high then again low. |
| Static-1 hazard with contact networks is a tie set hazard. | Static-0 hazard with contact networks is a cut set hazard. |
| SOP is used for removing static-1 hazard. | POS is used for removing static-0 hazard. |
| We deal with 1s in static-1 hazard. | We deal with 0s in static-0 hazard. |