Digital signal processing automatic gain control amplifier

A digital gain control loop for controlling the gain of input data to have a predetermined output level range comprising:

• a gain control filter responsive to the power level of the output signal of the gain control loop to generate a multibit gain control word;
• a shifter circuit responsive to selected bits of said gain control word shifts the input data in accordance with said selected bits to generate shifted data, the shifting of said input data corresponding to a first multiplication of the input data;
• and
• a multiplier circuit responsive to the remaining bits of said gain control word multiply said shifted data by preselected multiplication factors to generate said output signal, the shifted data being multiplied by preselected factors controlled by said remaining bits.