## Two Level Circuit:

If any logic expression or equation can be rearranged in such a way that each input is carried through only two gates to reach the output, that arrangement is called a two-level circuit.

Generally this type of circuit is used in SOP (SUM of PRODUCT) and POS (PRODUCT of SUM) operations

This type of circuit can be made by the combination of AND and OR or only NAND and NOR gates.

## SOP (SUM of PRODUCT):

Two level circuit using AND-OR logic gate is shown by SOP expression-

In this case the products of A and B and C and D [hence the AND (.) operation] are joined at the end by the OR operation.

Again, the two level circuit is shown by the SOP expression –

I see the product of A and B and the product of A and B and C inputs are added at the end of the three OR operations

## POS (PRODUCT of SUM):

In the SOP expression we see how many inputs are connected by the product of (AND operation) cooperative (series of products) OR operation.

Two-level circuit by POS expression and the opposite is true for the case. A two level circuit using OR-AND logic gate is shown by POS expression-

In this case the SUM (i.e. OR ) of the inputs A and B and C and D are finally joined by the AND operation.

Again the POS based two level circuit of F = (A+B)(A+B)C is shown-

I see, SUM (OR) of A and B and SUM (OR) of A and B and C inputs are joined by AND operation at the end of three.

## Frequently Asked Question (FAQs):

- Two Level Circuit.
- SOP (SUM of PRODUCT).
- POS (PRODUCT of SUM).