The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1998
Filed:
Jun. 04, 1996
Tadashi Shibata, Toyokawa, JP;
Satoshi Suzuki, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A transistor T26, serving as an output circuit 42, has a collector connected to a communication line B+ and an emitter connected to the other communication line B-. A base current generation circuit 44 generates a base current Ib for actuating transistor T26 based on a transmission signal. Transistors T24 and T25 constitute a current-mirror circuit. A correction circuit 46 takes in or absorbs a current equivalent to base current Ib from the collector of transistor T26, so as to equalize the drive currents IB+ and IB- flowing through twin communication lines B+ and B-. Since only one transistor T26 is used to actuate the twin communication lines B+ and B-, it, becomes possible to completely equalize the drive currents IB+ and IB- in their absolute values and to cause no phase dislocation between these two drive currents IB+ and IB-. Hence, the radio noises can be completely canceled when generated from each of twin communication lines B+ and B- due to change of currents flowing therethrough.