Feedback coupled analog to digital or digital to analog converter with reduced current consumption uses reference voltages to produce desired ADC or DAC output signal level

摘要

The feedback analog to digital converter has at least one analogue to digital converter (5) and at least one digital to analog converter (8) in at least one feedback loop, arrangements for providing at least one first and second reference voltage for the analogue to digital and digital to analog converters, whereby the reference voltages are designed to produce a desired level of output signal of the analogue to digital converter(s). Independent claims are also included for the following: a sigma-delta analogue to digital converter, a cascaded sigma-delta analogue to digital converter, a sigma-delta digital to analogue converter, cascaded sigma-delta digital to analogue converter and methods of using reference voltages to produce a desired output signal level.