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:
Sep. 23, 2008
Filed:
Jan. 10, 2007
Jean-michel Vladimir Redouté, Heverlee, BE;
Michiel Steyaert, Leuven, BE;
Jean-Michel Vladimir Redouté, Heverlee, BE;
Michiel Steyaert, Leuven, BE;
AMI Semiconductor Belgium BVBA, Oudenaarde, BE;
Abstract
A DC current regulator circuit comprises a first circuit node () which is operable to receive an external input voltage. A transistor (M) has an input, a first leg and a second leg. The first leg of the transistor is isolated from the first circuit node (). An amplifier () has an output connected to the input of the transistor (M), a first amplifier input for receiving a reference voltage (V) and a second amplifier input connected to the first circuit node (). A low-pass filter () connects between the output of the amplifier and the first circuit node (). A current mirror () connects in series with the second leg of the transistor (M) and has a first branch () for providing a regulated output current and a second branch () which connects to the first circuit node (). The current regulator has reduced sensitivity to conducted EMI received at the first circuit node ().