Control circuit for integrated circuits, for example for bistable multivibrators

摘要

1,091,713. Transistor gating circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 25, 1966 [June 21, 1965], No. 23343/66. Heading H3T. A gating circuit comprises a transistor having its base connected through a resistance to a source of gating pulses and through a capacitor to earth or other fixed potential, the emitter being connected to a source of set pulses. Two such gating transistors 30 and 32, Fig. 1, may have their collectors connected to the inputs of a bi-stable circuit 10, 12, as described in Specification 1,090,709, and the input capacitors 34, 36 serve to store a charge due to the gating pulse so that reliable operation is obtained at switch conditioning times of about 10 nanoseconds. The bases of the gating transistors may be connected by diodes 42, 44 to the collectors of output transistors 14, 16 of the bi-stable circuit to avoid ill effects caused by overshoot of the gating pulse. In a modification, Fig. 2 (not shown), the capacitors (70, 72) of the gating transistors (66, 68) are shunted by transistors (74, 76) having their bases connected to the output terminals (78, 80) of the bi-stable circuit so that the capacitor of the unwanted gate is discharged.