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:
Apr. 10, 2018
Filed:
Oct. 29, 2015
Consiglio Nazionale Delle Ricerche, Rome, IT;
UniversitĂ Degli Studi Di Firenze, Florence, IT;
Saverio Bartalini, Rome, IT;
Alessio Montori, Rome, IT;
Marco De Pas, Sesto Fiorentino, IT;
Mauro Giuntini, Sesto Fiorentino, IT;
Paolo De Natale, Rome, IT;
CONSIGLIO NAZIONALE DELLE RICERCHE, Rome, IT;
UNIVERSTĂ€ DEGLI STUDI DI FIRENZE, Florence, IT;
Abstract
Low-noise current source, configured to be supplied by at least one DC main supply (V) and to deliver an output current (I), the source comprising one or more current generator modules (G, G, . . . G) operating in parallel each one of which is configured to deliver a respective output current (I), whereby the output current (I) of the source is equal to the sum of the output currents (I) of said one or more current generator modules (G, G, . . . G), each current generator module (G; G; . . . G) comprising a regulator component (Q), configured to deliver the output current (I) of the current generator module (G; G; . . . G), a sensing resistor (R) connected in series to the regulator component (Q), and an error amplifier stage (IC), configured to compare a reference voltage (V) with a voltage drop (V) across the sensing resistor (R), whereby the error amplifier stage (IC) is configured to amplify an error signal equal to a difference between the between voltage (V) and voltage across the sensing resistor (R), the error amplifier stage (IC) being configured to output the amplified error signal that is configured to control the regulator component (Q), the current source being characterized in that each current generator module (G; G; . . . G) further comprises a first shunt type regulator (Z, I), configured to be connected to said at least one DC main supply (V), that is further configured to generate a dedicated supply voltage supplying the error amplifier stage (IC), whereby the error amplifier stage (IC) is configured to be supplied in a floating manner with respect to said at least one DC main supply (V).