Method and apparatus for conversion of signal level from ECL to

Details Method and apparatus for conversion of signal level from ECL to Method and apparatus for conversion of signal level from ECL to

1991-08-14

1992-12-22

Pascal, Robert J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307455, 307456, H03K 1900

Patent

active

051736250

ABSTRACT:
A level conversion apparatus for converting a signal of an ECL level into a signal of a TTL level is disclosed which has source voltages set to a potential corresponding to a lower limit logic swing of the ECL level and a potential corresponding to an upper limit logic swing of the TTL level. This level conversion apparatus includes a reference voltage generating circuit for generating an upper limit reference voltage and a lower limit reference voltage divided from a voltage applied between a source terminal Vcc and a ground terminal, a control signal generating circuit for generating a control signal in response to the ECL level signal, determined by a difference between the upper limit reference voltage and the lower limit reference voltage, and an output switching circuit for carrying out a switching operation in response to the controlled signal. The output switching circuit outputs a signal determined by the potential corresponding to the upper limit logic swing of the TTL level and a ground source.

REFERENCES:
patent: 3766406 (1973-10-01), Bryant et al.
patent: 3986045 (1976-10-01), Lutz
patent: 4368395 (1983-01-01), Taylor
patent: 4629913 (1986-12-01), Lechner
patent: 4644194 (1987-02-01), Birrittella et al.
patent: 4678944 (1987-07-01), Williams
patent: 4998029 (1991-03-01), Sundstrom
patent: 5081376 (1992-01-01), Nitta et al.
NTT LSI Laboratories Publication by Suzuki et al. entitled "ECL to TTL, TTL to ECL Transistor IC", p. C-2-94.

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