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:
Aug. 21, 2001
Filed:
Jan. 10, 2000
Arshad Madni, Swindon, GB;
Nicholas P Cowley, Wroughton, GB;
Mitel Semiconductor Limited, , GB;
Abstract
A voltage to current converter comprises a first long tail pair comprising transistors whose emitters are connected via equal value resistors to a constant current source. The first long tail pair forms a main transconductance stage. A subsidiary or corrector transconductance stage is connected in anti-phase with the main stage. The corrector stage is based on another long tail pair comprising transistors whose emitters are connected via resistors to another constant current source. The linear part of the transconductance of the corrector stage is substantially less than that of the main stage but the non-linear part is substantially equal to that of the main stage. Thus, non-linear distortion can be substantially reduced.