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. 21, 2005
Filed:
Jun. 17, 2003
Giovanni Calí, Catania, IT;
Roberto Pelleriti, Catania, IT;
Felice Torrisi, Lentini, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A device converts a differential signal (Vin, Vin) to a single signal (Vout). The device includes at least one pair of transistors (Q, Q) having equal transconductance gain (gm) and arranged according a differential stage configuration. The transistors (Q, Q) have the differential signal (Vin, Vin) in input at the drivable terminals, have first non drivable terminals coupled respectively to first terminals of a first (R) and a second (Rout) passive elements having second terminals connected with a first supply voltage (VDD), second non drivable terminals coupled to a second supply voltage (VEE) lower than the first supply voltage (VDD). The first terminal of the second passive element (Rout) is the output terminal (OUT) of the device. The last includes a transistor (Q) having a first non drivable terminal connected with the output terminal (OUT) of the device, a second non drivable terminal coupled with the second supply voltage (VEE) and the drivable terminal connected with the first terminal of the first passive element (R). The further transistor (Q) has such a transconductance gain (gm) that the product of the transconductance gain (gm) by the first passive element (R) is unitary.