TTL Logic gate

Details TTL Logic gate TTL Logic gate

1981-07-10

1984-07-03

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 307280, 307299A, H03K 19088, H03K 19013

Patent

active

044581629

ABSTRACT:
A Transistor-Transistor Logic (TTL) gate is disclosed wherein a different amount of base current is applied to the inverter transistor than is applied to the base of the output transistor. In one embodiment, a current mirror circuit controls the amount of base current flowing between the input transistor collector terminal and the base terminal of the inverter transistor to an amount less than that flowing between the input transistor collector terminal and the base terminal of the output transistor. In another embodiment, a resistor in series with the base of the inverter transistor performs the same function as the current mirror circuit.

REFERENCES:
patent: 3303355 (1963-06-01), Kolling
patent: 3564281 (1971-02-01), Tokunaga et al.
patent: 3571616 (1971-03-01), Andrews
patent: 3629609 (1971-12-01), Pedersen et al.
patent: 3769530 (1973-10-01), Kalb et al.
patent: 3867644 (1975-02-01), Cline
patent: 3934157 (1976-01-01), Evans
patent: 4092551 (1978-05-01), Howard et al.
patent: 4194131 (1980-03-01), Mrazek et al.

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