Patent ID: 7245894
Filing Date: 2007-07-17
Classification: H03D,H03G,H04B,H04L

Abstract:
1. A radio receiver comprising: a first amplifier to amplify a received radio signal; a demodulation circuit line comprising a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and to generate a baseband signal, a second amplifier to amplify the baseband signal, and a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that the gain of said first amplifier and the gain of said second amplifier are changed, on the basis of a gain of said first amplifier before and after the change, wherein in a case that the gain of said first amplifier is changed from a high gain to a low gain and the gain of said second amplifier is changed from a low gain to a high gain, said gain controller delays timing of the change in the gain of said second amplifier as compared with timing of the change in the gain of said first amplifier.