Circuit for generating discrimination voltage level

Details Circuit for generating discrimination voltage level Circuit for generating discrimination voltage level

1989-02-22

1991-03-19

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

307358, H04L 2506

Patent

active

050017268

ABSTRACT:
A circuit for generating a discrimination voltage level V.sub.ref which is used as a reference voltage to discriminate between two adjacent logic levels or an input signal which can have a plurality of different voltage levels generally corresponding to a plurality of respective, different logic levels. The frequency at which the levels of the input signals lie in the upper half of the vicinity (i.e., the voltage range from the level V.sub.ref -.DELTA.V to the level V.sub.ref +.DELTA.V) of the discrimination voltage level (i.e., the "upper half" thereof being the voltage range from V.sub.ref to V.sub.ref +.DELTA.V, ".DELTA.V" being a predetermined off-set value) and the frequency at which the levels of the input signals lie in the lower half of the vicinity (i.e., as above defined) of the discrimination level (i.e., the "low half" thereof being the voltage range from V.sub.ref -.DELTA.V to V.sub.ref) are compared, and the discrimination level is controlled so that the above two frequencies are the same.

REFERENCES:
patent: 4161628 (1979-07-01), McRae
patent: 4535294 (1985-08-01), Ericksen et al.
patent: 4540897 (1985-09-01), Takaoka et al.
patent: 4575683 (1986-03-01), Roberts et al.
patent: 4575863 (1986-03-01), Butcher et al.
patent: 4631737 (1986-12-01), Davis et al.

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