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. 19, 2000
Filed:
Apr. 21, 1998
Hannu Manninen, Espoo, FI;
Mika Tiilikainen, Helsinki, FI;
Nokia Mobile Phones, Ltd., Espoo, FI;
Abstract
The invention relates to programmable amplifiers, more specifically to structural solutions of amplifiers realised on integrated circuits. In the amplifier according to the invention a differential voltage-mode input signal is converted into a differential current signal and at least part of the common-mode component is removed from the differential current signal. An offset current is added to the differential current signal and the magnitude of the offset current is adjusted according to the gain, thus preventing the common-mode current from becoming too large at the amplification stage. The differential current signal is amplified using programmable current amplifiers realised by current mirrors and converted back into a voltage-mode signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile