| 摘要 |
1,095,071. Transistor logic circuits. COMPAGNIE DES FREINS & SIGNAUX WESTINGHOUSE. Jan. 1, 1965 [Jan. 8, 1964], No. 126/65. Heading H3T. A fail-safe OR circuit comprises a pair of transistors 9, 19, supplied with periodic signals and coupled to the control electrode of a further transistor 1 via respective parallel resistance/ capacitance combinations 13, 14; 23, 24. Binary signals 1 and 0 are respectively represented by presence and absence of periodic signals. Diode 4 assumes that transistor 1 is non-conductive at elevated temperatures in the absence of periodic signals from 16 or 26. |
