| 摘要 |
1285990 Transistor bi-stable circuits CENTRE ELECTRONIQUE HORLOGER SA 5 Nov 1969 [7 Nov 1968] 54145/69 Heading H3T A bi-stable consists of first and second pairs of transistors 1, 3 and 2, 4 each pair having the collector emitter paths of its transistors in parallel and being reciprocally connected with the other pair, a further transistor 9, 10 being connected to each pair with its collector-emitter path between the common collectors and the base of one transistor 3, 4 of the pair and its base connected to the base of the other transistor 1, 2 of the pair; and the bi-stable also contains two diodes 21, 23 and 24, 22 between the collector circuit of each pair and the base of the said one transistor 3, 4 of each pair. The diodes 21-24 are constituted by the emitter-base functions of transistors formed with the rest on an integrated circuit. The collector circuits include resistors 17-20 and diodes 15, 16, the resistors 17, 18 being omitted (Fig. 3, not shown) for higher operating frequencies. In operation, if T1, T3 are on and T2, T4 are off, a positive input pulse at 13 applied through C11, C12 to points B1, B2 does not affect T3 but passes through T9 to point O1 where it divides to T1 collector and T2 base; the pulse at 13 also tends to turn on T4, T10 being non-conductive. The state of the bi-stables changes over, and is ready to respond to the next input pulse at 13 to change back again.
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