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US 5,349,287 AGranted
Low power comparator having a non-saturating current mirror load
AssigneeNational Semiconductor Corporation
InventorPerry S. Lorenz
Life of this patent
Estimating the term…
Abstract
ECL to TTL converter circuits are shown having current mirror loads which produce the required differential to single-ended conversion. Saturation is avoided in the current mirror by connecting a resistor between the collector and base the output transistor.
Claims5
An ECL to TTL converter employing a differential driver input responsive to ECL signals, said driver being coupled to current mirror load comprising:
- an input transistor having its collector coupled to its base thereby to operate as a diode;
- an output transistor having a collector and having its base coupled to said input transistor base;
- a resistor connected between said output transistor collector and base whereby saturation is avoided in said output transistor;
- and
- output buffer means coupled to said collector of said output transistor whereby TTL output signals are developed.
2 more elements
Dependencies are inferred from the claim text.