US 12,081,371 B2
Device for can transceiver, transceiver and method
Cornelis Klaas Waardenburg, Zeeland (NL); Johannes Petrus Antonius Frambach, Nijmegen (NL); Stefan Paul van den Hoek, Winssen (NL); and Rinke de Jong, Nijmegen (NL)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Nov. 29, 2022, as Appl. No. 18/059,595.
Claims priority of application No. 21213228 (EP), filed on Dec. 8, 2021.
Prior Publication US 2023/0179454 A1, Jun. 8, 2023
Int. Cl. H04L 25/02 (2006.01); H03F 3/45 (2006.01); H04L 12/40 (2006.01)
CPC H04L 25/0276 (2013.01) [H03F 3/45511 (2013.01); H04L 12/40 (2013.01); H04L 2012/40215 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An attenuation device for a controller area network (“CAN”) transceiver, the attenuation device comprising:
two device output nodes configured to electrically couple the attenuation device via the device output nodes between two transceiver terminals of the CAN transceiver;
wherein the attenuation device is configured to change from a first device state to a second device state in response to applying a common mode voltage to the device output nodes that is either greater than a first reference voltage or less than a second reference voltage that less than the first reference voltage;
wherein the attenuation device is further configured to cause a first electrical output resistance at each device output node during the first device state; and
wherein the attenuation device is configured to cause a second electrical output resistance at each device output node during the second device state, wherein the second output resistance is less than the first output resistance;
wherein the attenuation device comprises an electrical circuit having a first branch and a second branch;
wherein the first branch extends from the first device output node through a first electrical resistor and a first diode to a first reference voltage node of the circuit and from the second device output node through a second electrical resistor and a second diode to the first reference voltage node of the circuit; and
wherein the second branch extends from said first device output node through the first resistor and a third diode to a second reference voltage node of the circuit and from said second device output node through the second resistor and a fourth diode to the second reference voltage node.