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:
Feb. 12, 2002
Filed:
Sep. 13, 2000
Salvatore Capici, Barrafranca, IT;
Filippo Marino, Tremestieri, IT;
STMicroeletronics S.r.l., Agrate Brianza, IT;
Abstract
An integrated circuit includes a first access pin and a second access pin, and an electronic circuit for trimming a portion of the integrated circuit. The electronic circuit includes a memory element, and a regulation circuit for modifying the memory element. The regulation circuit includes an error amplifier for comparing an output voltage of the portion of the integrated circuit to be trimmed with an internal voltage reference. A comparator includes a first input connected to an output of the error amplifier and to the first access pin. A first switch is connected between the output of the error amplifier and the first input of the comparator. A second comparator includes a first input connected to the second access pin, and an output connected to the first switch for control thereof. A second switch is connected to the output of the error amplifier and to the first access pin. A serial interface is connected to the second switch for receiving via the first access pin a data sequence relating to trimming the portion of the integrated circuit. A control logic circuit is connected to the serial interface for controlling the trimming based upon the received data sequence.