Electronic circuit arrangement for receiving low frequency electromagnetic waves with an adjustable attenuator element

摘要

An electronic circuit arrangement for receiving low-frequency electromagnetic waves is proposed, having an inductor (L) acting as an antenna for generating a received signal, having a first receiver (2), connected to the inductor (L), for decoding a first component of the received signal and having a second receiver (3), connected to the inductor (L), for decoding a second component of the received signal, wherein at least the second receiver (3) is connected to the inductor (L) via an attenuator element (4) having adjustable attenuation, wherein at least one adjustment signal generation circuit (5, 6) is provided for generating an adjustment signal corresponding to a voltage of the received signal which is fed to the attenuator element (4) for adjusting the attenuation.

主权项

1. An electronic circuit comprising:
an antenna that receives a wireless signal and outputs an encoded signal; a first decoder coupled to receive at least a first portion of the first encoded signal, the first decoder decodes a first component of the encoded signal; a second decoder coupled to receive at least a second portion of the first encoded signal, the second decoder decodes a second component of the encoded signal and switches the electronic circuit between a standby mode and an operating mode, the second decoder operating at a lower voltage level than the first decoder; and an attenuator element coupled between the antenna and the second decoder, the attenuator element determines if the at least second portion of the first encoded signal is above a voltage threshold and reduces a voltage level on the at least one second portion of the first encoded signal if the voltage threshold is exceeded.