| 摘要 |
PURPOSE:To prevent the software error of an ECL circuit of the like without sacrificing the operating speed by absorbing negative pulse noise generated while the collector region of a differential transistor(TR) is irradiated with an alpha ray. CONSTITUTION:An input gate circuit RGI is provided with a couple of unit gate circuits (ECL circuits) GA, GB and each unit gate circuit uses a couple of differential TRs T1, T2 as its basic building block. Then noninverting output nodes n5, n11 and n6, n12 are coupled in common in the unit gate circuit to form the OR form. Thus, the collector region of the differential TRs T1, T2 is irradiated with an alpha ray or the like and even when a negative pulse noise to extract a high level is generated, it is absorbed. Thus, the software error of an ECL(Emitter Coupled Logic) circuit or the like is prevented without sacrificing the operating speed of the circuit. |
