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:
Mar. 01, 1994
Filed:
Jul. 22, 1992
Timo Saarnimo, Salo, FI;
Mika Niemio, Salo, FI;
Nokia Mobile Phones Ltd., Salo, FI;
Abstract
Control circuitry for maintaining the magnitude of an RF signal from an RF signal amplifier at a predetermined level includes a detector which is supplied with a signal indicative of the power level of the output from the amplifier and outputs a signal which is dependant upon the input signal. A detector (100) is provided with a negative feedback loop (200) which supplies a biasing voltage Vb to the input of the detector, whereby the biasing voltage Vb decreases if the magnitude of the signal (P) input and hence the output signal (Vr), increases, thus serving to decrease the output voltage (Vr), and vice versa. This has the advantage of increasing the dynamic range of the detector.