Delta Sigma analog to digital converter system with automatic gain control responsive to out-of-band interferers

摘要

An improved DeltaSigma analog to digital converter system with automatic gain control response to out-of-band interferers including a DeltaSigma multibit analog to digital converter responsive to an analog input for providing a digital output including the in-band signal and out-of-band interferers and quantization noise and a signal peak estimator circuit responsive to the out-of-band interferers for generating a gain control signal for adjusting the gain of a variable gain element which may be an independent element such as a variable gain amplifier or it may be the analog to digital converter itself by virtue of its having an adjustable full-scale.