Patent ID: 7149487
Filing Date: 2006-12-12
Classification: H03G,H04B

Abstract:
1. A mobile communication terminal comprising: a variable gain amplifier means for amplifying a received signal with a controlled gain and outputting that amplified received signal; a gain control means for controlling the gain of said variable gain amplifier means and also for outputting a gain switching signal for a specified period at the gain switching timing of said variable gain amplifier means; an output switching means for outputting the received signal amplified by said variable gain amplifier means until said gain switching signal is supplied and then outputting a specified voltage signal instead of the received signal amplified by said variable gain amplifier means as long as said gain switching signal is being supplied; a feedback means for detecting direct current components in the received signal output from said variable gain amplifier means and outputting those direct current components after inverting the polarity; and an adder means for adding the direct current components with the polarity inverted by said feedback means, to the received signal supplied to said variable gain amplifier means.