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:
Mar. 07, 2000
Filed:
Jan. 27, 1999
Marco Pasotti, S. Martino Siccomario, IT;
Roberto Canegallo, Tortona, IT;
Ernestina Chioffi, Pavia, IT;
Giovanni Guaitini, Trecella, IT;
Cedric Issartel, Grenoble, FR;
Pier Luigi Rolandi, Monleale, IT;
STMicroelectronics S.R.L., Agrate Brianza, IT;
Abstract
The reading circuit comprises a current source, which, via a current reflection circuit, supplies a constant predetermined current to a cell to be read, an operational amplifier with a non-inverting input connected to the drain terminal of the cell, and an output connected to the gate terminal of the cell. The source terminal of the cell is connected to ground. Thereby the output voltage of the operational amplifier supplies directly (at the set current) the threshold voltage of the cell, and the drain terminal of the cell is biased to a positive voltage.