TY - PAT A1 - Killat, Dirk A1 - Haase, Ordwin A1 - Werker, Heinz T1 - Output driving circuit Y1 - 2002 ER - TY - PAT A1 - Killat, Dirk A1 - Werker, Heinz T1 - Driving Circuit Y1 - 2001 ER -