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:
Jul. 13, 1999
Filed:
Jul. 09, 1997
U.S. Philips Corporation, New York, NY (US);
Abstract
An amplifying device has a decibel gain that evolves quasi-linearly as a function of the digital value of a control word C(O:M-1). The device includes: an amplifying stage with K amplifiers having mutually different decibel gains, the gain in decibels of each amplifier being a multiple of the same value G0; a switching stage with K switches; a gain-controlled amplifier having a gain which varies between 0 and G0 as a function of the value of the N least significant bits (C(O:N-1)) of the control word received at its digital input; and a decoder receiving a digital word including the (M-N) most significant bits (C(N:M-1)) of the control word. The decoder has K logic outputs controlling the K switches.