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:
Sep. 10, 2002
Filed:
Oct. 20, 2000
Luciano Tomasini, Milan, IT;
Jesus Guinea, Bergamo, IT;
STMicroelectronics S.R.L., Agrate Brianza, IT;
Abstract
The difference between the Vgs voltages of first and second MOS transistors of an integrated circuit due to variations in the production process and/or to variations of other parameters is compensated by a compensation circuit. The compensation circuit includes third and fourth MOS transistors that are the same type as the first and second transistors. These transistors are all formed in the same integrated circuit. The compensation circuit includes a bias circuit for biasing the third and fourth transistors, and a measurement circuit for measuring the difference between the Vgs voltages of the third and fourth transistors. The compensation circuit further includes a current compensation circuit for generating a compensation current that is a function of the difference measured, and a modification circuit for modifying the biasing of the first and second MOS transistor using the compensation current.