US 12,282,045 B2
Common mode evaluation in a differential galvanic isolation signal transmission circuit
Marcus Nuebling, Olching-Esting (DE); and Tommaso Bacigalupo, Fuerstenfeldbruck (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Dec. 2, 2022, as Appl. No. 18/061,001.
Prior Publication US 2024/0183883 A1, Jun. 6, 2024
Int. Cl. G01R 15/18 (2006.01); G01R 27/28 (2006.01)
CPC G01R 15/181 (2013.01) [G01R 27/28 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A circuit comprising:
a galvanic isolation barrier comprising one or more coupling components configured to conduct signals across the galvanic isolation barrier;
isolated differential-signal communication circuitry comprising the coupling components, wherein the isolated differential-signal transmission circuitry includes:
a first signal path comprising a first input terminal and a first output terminal, wherein the first signal path defines a first isolation barrier impedance; and
a second signal path comprising a second input terminal and a second output terminal, wherein the second signal path defines a second isolation barrier impedance that is different than the first isolation barrier impedance,
wherein the first input terminal and the second input terminal are located on a first side of the galvanic isolation barrier, and
wherein the first output terminal and the second output terminal are located on a second side of the galvanic isolation barrier opposite the first side; and
test mode circuitry configured to determine an indication of common mode transient immunity (CMTI) for the isolated differential-signal communication circuitry.