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:
May. 19, 1987
Filed:
Oct. 10, 1986
John L Addis, Beaverton, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A voltage-controlled current source produces two output current signals whose difference is linearly related to an input voltage signal. The source includes an input buffer and a reference buffer each coupled separately to a current mirror and also coupled together across a current transmitting resistor. In response to the input voltage signal and current transmitted between the buffers, the current mirrors produce currents that differ in proportion to the difference between the input and reference voltage signals. The current mirrors also reproduce the differing currents in output paths as the output current signals. A fixed current source is coupled to each output path for drawing a fixed current from each path to linearize the current difference.