Apparatus for reducing dc offset in a receiver

A method for reducing a DC offset in a signal path of a conversion system comprising the steps of:

• providing an input signal from a front end circuit;
• amplifying the input signal in an amplifier system coupled to the front end circuit to receive and amplify the input signal;
• passing the input signal through a multi-bit sigma delta modulator for receiving the input signal from the amplifier system to provide a first bit quantizer;
• reducing a DC offset in said signal path wherein a DC adapt circuit is coupled to the sigma delta modulator for receiving the first bit quantizer from the sigma delta modulator and for providing an operation to reduce a DC offset in said signal path, wherein a digital to analog converter coupled to the digital DC adapt circuit provides an analog signal representative of the DC offset correction to an input of the amplifier system, wherein the digital DC adapt circuit and the digital to analog converter form a feedback path originating at the first bit of the multi bit sigma delta modulator to an input of the amplifier system.