OPEN-DRAIN BUS REPEATER AND SYSTEM COMPRISING THE SAME

The present invention generally relates to a repeater for open-drain bus communication and a system comprising the same. More particularly, the present invention relates to a repeater that is suitable for I2C bus communication.A bus repeater (1) for open-drain bus communication is provided. The repeater (1) comprises at least one repeating unit, the repeating unit having an A-side terminal (2a) configured to be electrically connected to an A-side open-drain bus, and a B-side terminal (2b) configured to be electrically connected to a B-side open-drain bus. The repeater is operable in a first mode in which the repeating unit is configured to receive a signal at the A-side terminal (2a) and to produce a signal at the B-side terminal (2b) based on the signal received at the A-side terminal. The repeating unit comprises a B-side accelerator element (3b) electrically connected to the B-side terminal.Further, the repeating unit further comprises a first control unit (11a) configured to, when the repeating unit is operating in the first mode, control the B-side accelerator element (3b) to pull up a voltage at the B-side terminal (2b) when the voltage at the A-side terminal (2a) surpasses a first threshold voltage during a rising edge of said voltage, and to subsequently control the B-side accelerator element to stop pulling up the voltage at the B-side terminal when the voltage at the B-side terminal surpasses a second threshold voltage.