Calculation of External Resistance of Two Gates' Circuits Connected with Different Loads

The TTL nand gate cannot be directly connected with the output port of two gates to set a relationship with their output information while the integrated open-collector nand gate can do so by making a proper choice of between the integrated open-collector lines and the resistances.This paper aims to analyze the calculation of, Rp, the externally connected resistance of integrated gate circuit which is made up of open-collector gate, and open-drain gate when the and-not gate, and nor gate of the Loaded gates are discussed respectively.