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:
Aug. 19, 1986
Filed:
Feb. 11, 1985
Ernst H Nordholt, Berkel en Rodenrijs, NL;
Hendrikus C Nauta, Nootdorp, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Gain-controlled amplifier arrangement with a cascade arrangement of first and second gain-controlled amplifier stages, an AM-detection circuit and an integrating arrangement for generating a control voltage for the two stages and a threshold circuit for generating first and second threshold voltages, for delaying at an increasing input level the start of the control of the first stage (1-8) relative to that of the second stage (19-28). So as to prevent the gain control of the first stage from starting, for example because of an unwanted variation of the threshold voltages, before the gain control of the second stage has ended, the control ranges of the two stages are separated from each other by a separation area in which no gain control is effected. In order to prevent an unwanted deviation of the output level in that separation area the control voltage is generated by integration of a current in a capacitor (37), which current varies with the input level, so that this control does not only depend on the actual input level but also on the duration of occurrence of this input level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile