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:
Dec. 07, 2004
Filed:
Sep. 25, 2003
Bertrand Gabillard, Paris, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An improved voltage to current converter circuit having three stages. The first stage amplifies the input voltage signals. The second stage includes first and second/third current sources that are connected in a current mirror configuration with a common node therebetween. The third stage consists of an output transistor to form a half cascode current mirror having its drain connected to the second/third current sources and to the output terminal. The gate of the output transistor is coupled to a bias voltage and to the drain of an additional transistor so that the potential on the gate of the output transistor can vary to have both transistors of the third stage in the saturation state for a wide range of the current flowing through the transistors of the half cascode current mirror.