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. 02, 1991
Filed:
Apr. 30, 1990
David W Feldbaumer, Chandler, AZ (US);
Robert L Vyne, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An active integrated termination circuit for providing a predetermined impedance at an output includes first and second resistors each having one end of which is commonly connected to the output. A first switching element is coupled between the other end of the first resistor and a first power supply conductor and is responsive to control signals for selectively coupling and de-coupling the first resistor to the first power supply conductor. A second switching element is coupled between the other end of the second resistor and a second power supply conductor and is responsive to the control signals for selectively coupling and de-coupling the second resistor to the second power supply conductor. The first and second resistors are polycrystalline silicon resistors and are trimmed to predetermined values by pulsing a high current unilaterally therethrough.