Koninklijke Philips Corporation N.v.

Robert John Marshall

Alma Stephanson Anderson

Jeffrey Alma West

Dominicus M Roozeboom

The invention implements a Positive Emitter Coupled Logic (PECL) output using CMOS transistors that approximate the Motorola ECL characteristics into standard PECL termination schemes. By creating a PECL output using a switchable current source the PECL output can be integrated into a Low Voltage Differential Signaling (LVDS) structure. The invention allows the user to switch between PECL and LVDS outputs via control logic by enabling the specific circuit elements for each signaling technology. With this invention, the combination of two drivers on one IC device gives system designers the flexibility to use the same circuitry in two separate signaling schemes. Thus, the designers can select to use one output characteristics or the other for their designs.

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Morgan Hill, CA, United States of America

Robert John Marshall