Infineon Technologies Ag

Dirk R&ouml;mer

Thomas Steinecke

Herbert Eichfeld

Thomas Ehben

Thomas K&uuml;nemund

A device for reducing the electromagnetic emission in integrated circuits having driver stages reduces the electromagnetic emission of an integrated circuit without requiring an increase in the blocking capacitance in the process. This is achieved by combining driver stages which do not switch simultaneously to form driver groups, and special wiring of a plurality of blocking capacitors.

Device for reducing the electromagnetic emission in integrated circuits with driver stages

The invention relates to a bus driver having an inverter for driving a preferably clocked signal on a bus line. In the event of a capacitive coupling of the bus line to at least one neighboring bus line, a number of secondary inverters corresponding to the number of capacitively coupled bus lines are connected in parallel with the inverter of the bus driver. A simple logic combination supplies the necessary activating signals for the parallel connection of the secondary inverters. As a result, an additional secondary inverter can be connected in when an opposite edge occurs on a neighboring line for the instant of the edge. The invention consequently enables the driver intensity to be adapted dynamically to the signals of neighboring capacitively coupled bus lines.

Growing community of inventors

München, Germany

Dirk Römer

Growing community of inventors

München, Germany

Dirk R&ouml;mer

Dirk Römer