Patent ID: 8219055
Filing Date: 2012-07-10
Classification: H03G,H04B

Abstract:
1. A tuner for a wireless receiver, comprising: an input interface adapted to receive wireless signals; a mixer adapted to select a specific frequency from signals received at said input interface; a controllable switch adapted to lead an output from said mixer towards a base-band unit of said tuner and to intermittently disconnect said output from the base-band unit; a direct current (DC) correction circuit coupled to said base-band unit; and a controller adapted to intermittently characterize one or more signal transfer characteristics of said base-band unit by causing a demodulator to apply a predefined signal to said DC correction circuit, and to measure an output of said base-band unit, while the mixer output is disconnected from the base-band unit, and wherein said controller is further adapted to set one or more tuner parameters based on the characterization.