Physics - Semiconductors Question with Solution | TestHub

To obtain OR gate from NAND gates we need two NOT gates obtained from NAND gates and one NAND gate as figure.
Boolean expression $\gamma =\overline{\overline{\mathrm{A}}\cdot \overline{\mathrm{B}}}=\overline{\mathrm{A}}+\overline{\mathrm{B}}$ $=\mathrm{A}+\mathrm{B}\mathrm{OR}$ gate