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:
Jun. 19, 2001
Filed:
Jun. 29, 2000
Osama Khouri, Milan, IT;
Rino Micheloni, Turate, IT;
Ilaria Motta, Cassolnuovo, IT;
Guido Torelli, Sant'Alessio con Vialone, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
Presented is a voltage regulating circuit for a capacitive load, which is connected between first and second terminals of a supply voltage generator. The regulating circuit has an input terminal and an output terminal, and includes an operational amplifier having an inverting input terminal connected to the input terminal of the regulating circuit and a non-inverting input terminal connected to an intermediate node of a voltage divider. The voltage divider is connected between an output node, which is connected to the output terminal of the regulating circuit, and the second terminal of the supply voltage generator. The operational amplifier has an output terminal connected, for driving a first field-effect transistor, between the output node and the first terminal of the supply voltage generator. The output terminal of the operational amplifier is also connected to the output node through a compensation network. The voltage regulating circuit also includes a second field-effect transistor connected between the output node and the second terminal of the supply voltage generator, which has its gate terminal connected to a constant voltage generating circuit means.