A transistor-diode feedback type logic circuit

The paper describes an improved form of saturated transistor logic circuit in which rectifier diodes are used to provide non-linear current feedback from collector to base of the transistor. The resulting arrangement has many advantages over the basic saturated circuit, particularly with respect to speed and logical versatility. Due to the ability of the circuit to handle two levels of logic in each stage, mean delays approaching 1 ns per logical decision can be obtained using non-selected components.