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:
Jan. 18, 2000
Filed:
Apr. 14, 1998
Danilo Gerna, Montagna In Valtellina, IT;
Roberto Canegallo, Tortona, IT;
Ernestina Chioffi, Pavia, IT;
Marco Pasotti, S. Martino Siccomario, IT;
Pier Luigi Rolandi, Monleale, IT;
STMicroelectronicsS. r. l., Agrate Brianza, IT;
Abstract
An analog reading circuit having a current mirror circuit forcing two identical currents into a cell to be read and into a reference cell. An operational amplifier has an inverting input connected to the drain terminal of the cell to be read, a non-inverting input connected to the drain terminal of the reference cell, and an output connected to the gate terminal of the reference cell. The reference cell therefore forms part of a negative feedback loop which maintains the overdrive voltages of the cell to be read and the reference cell constant, irrespective of temperature variations. The reading circuit is also of high precision and has a high reading speed.