Method and device for controlling a common-mode voltage of a system with switched capacities, in particular an analogue-to-digital converter

摘要

The method involves determining a current common-mode voltage of a switched-capacitor system. A difference between the current common-mode voltage and a desired common-mode voltage is converted into a resultant current in a flow-through conduction cell (CEL). The resultant current is reinjected into the switched-capacitor system via a resistive path. A flow-through conduction proportional of a flow-through conduction cell is converted to a switching frequency of the switched-capacitor system. Independent claims are also included for the following: (1) a device for controlling a common-mode voltage of a switched-capacitor system (2) a circuit for controlling a common-mode voltage of a switched-capacitor system.