Bus driver for CAN buses with a data bus state-controlled accelerated transition from the dominant to the recessive data bus state

摘要

Bus driver (CANTR) for controlling a differential data bus - the differential data bus comprising a first single-wire data bus line (CH) and a second single-wire data bus line (CL) and - the data bus being in a dominant data bus state (DBM) and in a recessive data bus state (RBM) can and - where the bus driver (CANTR) in the dominant data bus state (DBM) places the first single wire data bus line (CH) on a first electrical potential (HP) and - where the bus driver (CANTR) in the dominant data bus state (DBM) connects the second single wire data bus line (CL) to a second electrical potential (LP), which is different from the first electrical potential (HP), and - the bus driver (CANTR) in the recessive data bus state (RBM) does not drive the first single-wire data bus line (CH) at times and - the bus driver ( CANTR) in the recessive data bus state (RBM) does not drive the second single-wire data bus line (CL) at times and the bus driver (CAN TR) in the recessive data bus state (RBM) after a change from the dominant data bus state (DBM) to the recessive data bus state (RBM), the first single-wire data bus line (CH) sets a fourth electrical potential (MPL) for an active time (TA) and the bus driver (CANTR) in the recessive data bus state (RBM) after a change from the dominant data bus state (DBM) to the recessive data bus state (RBM) places the second single-wire data bus line (CL) on a third electrical potential (MPH) for an active time (TA) and - where that third electrical potential (MPH) is different from the first electrical potential (HP) and from the second electrical potential (LP) and the value of the third electrical potential (MPH) is between the value of the first electrical potential (HP) and the value of the second electrical potential (LP) is, - characterized in, - that the fourth electrical potential (MPL) from the first electrical potential (HP) and from the second electrical potential (LP) and is different from the third electrical potential (MPH) and that the value of the fourth electrical potential (MPL) lies between the value of the second electrical potential (LP) and the value of the third electrical potential (MPH).