# De Morgan's Theorems

Advertisements

De Morgan has suggested two theorems which are extremely useful in Boolean Algebra. The two theorems are discussed below.

## Theorem 1

The left hand side (LHS) of this theorem represents a NAND gate with inputs A and B, whereas the right hand side (RHS) of the theorem represents an OR gate with inverted inputs.

This OR gate is called as

**Bubbled OR**.

Table showing verification of the De Morgan's first theorem −

## Theorem 2

The LHS of this theorem represents a NOR gate with inputs A and B, whereas the RHS represents an AND gate with inverted inputs.

This AND gate is called as

**Bubbled AND**.

Table showing verification of the De Morgan's second theorem −

boolean_algebra.htm

Advertisements