Title:
【発明の名称】振幅変調信号の復調用装置
Document Type and Number:
Japanese Patent JP2003513497
Kind Code:
A
Abstract:
A device for demodulating a modulated signal resulting from an amplitude modulation of a sinusoidal signal of frequency fo by a signal of frequency fm according to an unknown modulation rate, comprising a transistor (10) where the gate is connected to the modulated signal (Et) so as to obtain in the transistor (10) output a derived signal (St) equal to a power N of the modulated signal, N being an integer greater than 1, and a filter for selecting the frequency component fm in the transistor output signal. The device can be used to demodulate an amplitude-modulated signal received by a scanner of a system identifying contactless portable objects.
Inventors:
Morand, Sebastian
Application Number:
JP2001533619A
Publication Date:
April 08, 2003
Filing Date:
October 26, 2000
Export Citation:
Assignee:
AESCA
International Classes:
H03D1/18; (IPC1-7): H03D1/18
Attorney, Agent or Firm:
Shinichi Ogawa (2 outside)