BiCMOS TTL output driver

Details BiCMOS TTL output driver BiCMOS TTL output driver

1990-11-06

1991-08-06

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307446, 307570, 307443, H03K 1988

Patent

active

050380583

ABSTRACT:
An output driver circuit having a CMOS logic level input signal applied at an input for providing a TTL logic level output signal at an output includes a push and a pull transistor for respectively pushing and pulling current at the output of the circuit. A first circuit, responsive to the input signal and coupled to the bases of the push and pull transistors, for alternately rendering the push and pull transistors operative, the first circuit controlling a DC drive of the pull transistor. A second circuit, responsive to the input and output signals, for increasing the voltage at the base of the pull transistor when the input and output signals are in predetermined logic states, the second circuit controlling the transient response of the output signal.

REFERENCES:
patent: 4593210 (1986-06-01), Boyer
patent: 4697103 (1987-09-01), Ferris et al.
patent: 4703203 (1987-10-01), Gallup et al.
patent: 4704548 (1987-11-01), Strong et al.
patent: 4740718 (1988-04-01), Matsui
patent: 4902914 (1990-02-01), Masuoka
patent: 4912344 (1990-03-01), Yin
patent: 4970414 (1990-11-01), Ruth, Jr.

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