Abstract: Methods and systems for a DC offset correction loop for a mobile digital cellular television environment are disclosed. Aspects of one method may include removing at least a portion of a DC offset from output of an amplifier. The DC offset may be removed from a single stage amplifier, or from each stage of a N stage amplifier, where N may be an integer. The DC offset may be removed by using second differential signals generated from first differential signals, where the second differential signals may be communicated to inputs of the amplifier. The first differential signals may by a first circuit that integrates outputs of the amplifier. The first circuit may perform the integration using a variable corner frequency that may be adjusted by changing a resistance of at least one variable resistor in the first circuit.

Abstract: Aspects of a method and system for a multi-band direct conversion CMOS mobile television tuner are provided. A single-chip multi-band RF receiver in a mobile terminal comprising UHF and L-band front-ends receives and amplifies an RF signal utilizing an LNA integrated into the front-end that corresponds to the type of signal received. A received signal strength indicator (RSSI) value may be determined for the amplified signal within the single-chip receiver and may be utilized to adjust a gain of the LNA. The adjustment may be made via on-chip or off-chip processing of the RSSI value. The single-chip receiver may directly convert the amplified signal to a baseband frequency signal and generate in-phase and quadrature components. The components of the baseband frequency signal may be filtered and/or amplified via programmable devices within the single-chip receiver. Circuitry within the single-chip receiver may be controller via an on-chip digital interface.