| 摘要 |
1,053,834. Transistor logic circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 3, 1964 [Feb. 1, 1963], No. 4477/64. Headings H3T. [Also in Division H1] Logic circuits are constructed using transistors which are provided with a " base current sink " region adjacent to the collector (see Division H1) so that when the base current exceeds that required to bottom the transistor the minority carriers injected into the collector region by the base region are collected by the sink region. This reduces carrier storage and thus increases the switching speed. In the NAND gate illustrated the three transistors are connected in series and their sink electrodes S are connected together and earthed. An AND gate is also described, Fig. 4 (not shown), and is similar to the circuit shown except that the resistor is inserted between earth and the emitter of the bottom transistor from which the output is taken and the collector of the upper transistor is connected directly to the positive supply. |
