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:
Nov. 23, 2004
Filed:
Nov. 16, 2000
Alan Anderson Hoover, Indianapolis, IN (US);
Thomson Licensing S.A., Boulogne-Billancourt, FR;
Abstract
A peak to peak detector circuit for use in an audio system comprises a first amplifier having an input terminal for receiving an L+R AC audio signal and an output terminal which is serially coupled to a resistor in series with a capacitor for generating a variable dc voltage having a time vs. amplitude relationship corresponding to the input L+R AC audio signal. A clamping diode having a cathode electrode coupled to a reference potential and having an anode electrode coupled to the capacitor operates to limit negative amplitude excursions associated with the variable dc voltage to a predetermined minimal value. A rectifying diode having a cathode electrode coupled to the anode electrode of the clamping diode, and an anode electrode coupled to a second capacitor to charge the second capacitor responsive to the amplitude of said variable dc voltage operates to produce a dc output signal proportional to the peak to peak amplitude of said L+R audio signal.