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:
Dec. 15, 2009
Filed:
May. 17, 2007
Evaldo M. Miranda, Saratoga, CA (US);
Anthonius Bakker, Morgan Hill, CA (US);
Evaldo M. Miranda, Saratoga, CA (US);
Anthonius Bakker, Morgan Hill, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A high-side current sense circuit comprises a sense resistance Rconnected in series with a signal having an associated current to be measured I, which develops voltages Vand Von either side of R. A differential gain stage powered by supply voltages VCC and VEE produces an output voltage which varies with the difference between its input signals. To keep the common mode portion of the input signal between voltages VCC and VEE, a voltage modification circuit subtracts or adds a common mode voltage to or from Vand Vto produce modified voltages V' and V′, which are coupled to the gain stage inputs. The voltage modification circuit is arranged to ensure that VEE≦V′ and V′≦VCC.