Current hogging logic circuit with npn vertical reversal transis

Details Current hogging logic circuit with npn vertical reversal transis Current hogging logic circuit with npn vertical reversal transis

1979-11-14

1982-05-04

Clawson, Jr., Joseph E.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 35, 357 44, 357 48, 357 92, 307299B, 307303, H01L 2972

Patent

active

043285090

ABSTRACT:
In an n-type base island are provided a p-type emitter stripe and a p-type output collector stripe, with one or more intermediate control collector stripes for switching the current of the output collector. The pattern of control collector stripes can provide AND functions, OR functions or combinations thereof in a single logic element in a single base island. Each output is provided with an npn current reversal transistor in a separate island and if more than one input is to be operated by the output of a logic element, decoupling and fan-out capability are provided by vertical pnp transistors driven by the inverter transistors, which do not require an island completely separate from the inverter transistor, although an isolating barrier stripe can be helpful. A bistable flipflop and a frequency divider cell are shown to illustrate the use of these logic structures. The decoupling referred to can be provided without fan-out amplification by means of diodes.

REFERENCES:
patent: 3713908 (1973-01-01), Agusta et al.
patent: 3725683 (1973-04-01), Andersen
patent: 3823353 (1974-07-01), Berger et al.
patent: 3829718 (1974-08-01), Hart
patent: 4056810 (1977-11-01), Hart et al.
patent: 4153909 (1979-05-01), Dobkin

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