Complementary Bi-Cmos XOR/XOR-NOT Circuits With Built-In Inverters
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
XOR circuits can be built with Bi-CMOS technology in two layers of logic function. In the standard XOR 2 ways shown in Fig. 1, the first layer is made with CMOS inverters and the second one with AND-OR-Inverter Bi-CMOS circuits. Some improvements have been made to reduce the number of FET transistors and to speed up the circuit for lower power dissipation. In that respect, Figs. 2 and 3 show respectively Bi-CMOS XOR2 and XNOR2 with built-in inverters.