Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Richard H. Hinkson0
David Mole0
Lance Weston0
Date of Patent
February 10, 2009
0Patent Application Number
113240950
Date Filed
December 30, 2005
0Patent Primary Examiner
Patent abstract
Line load compensation and reflection reduction in a signal transmitting circuit is provided using feedback capacitors. The feedback capacitor serially coupled with a resistance generates an RC rise/fall time that is independent of the line load. Additionally, by selecting a capacitor that yields a rise/fall time of approximately ⅓ of the maximum bit transmission time, signal reflection on the signal line can be reduced. Accordingly, by incorporating the feedback capacitor with a differential drive circuit, such as the IB 485 driver, variations in line load can be compensated for while also reducing signal reflection due to un-terminated or improperly terminated signal lines, thus allowing a free topology implementation.
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