ASYNCHRONOUS SAR ADC WITH CONVERSION SPEED CONTROL FEEDBACK LOOP

摘要

Systems and circuits for feedback control of an asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) are described. An example system includes the asynchronous SAR ADC (100). A timing detector circuit (302) is coupled to the asynchronous SAR ADC (100) to receive one or more internal signals (310) from the asynchronous SAR ADC (100). The timing detector circuit (302) outputs a timing detector signal (312) representing an internal timing of the SAR ADC (100). The timing detector signal (312) is generated based on the one or more internal signals (310). A regulator circuit (304) is coupled to the timing detector circuit (302) to receive the timing detector signal (312). The regulator circuit (304) is also coupled to the asynchronous SAR ADC (100) to output a feedback signal (314) to the asynchronous SAR ADC (100). The feedback signal (314) is generated based on the timing detector signal (312) to control the internal timing of the SAR ADC (100) to match a target timing.