Patent ID: 9148603
Filing Date: 2015-09-29
Classification: H03M,H04N

Abstract:
1. A method of operating an analog-to-digital converter, wherein the analog-to-digital converter comprises a plurality of capacitors each having a first terminal and a second terminal, a plurality of switches, at least a first conductive line at a first reference voltage, and at least a second conductive line at a second reference voltage that is different from the first reference voltage, wherein each of the switches is associated with the first terminal of a respective one of the capacitors, wherein each of the switches has a first configuration in which that switch couples the first terminal of its associated capacitor to the first conductive line at the first reference voltage and has a second configuration in which that switch couples the first terminal of its associated capacitor to the second conductive line at the second reference voltage, the method comprising: setting at least one of the switches in its first configuration and setting at least one of the switches in its second configuration; while at least the one of the switches is set in its first configuration and while at least the one of the switches is set in its second configuration, driving an input analog voltage onto a third conductive line, wherein the second terminals of the capacitors are coupled to the third conductive line; and after driving the input analog voltage onto the third conductive line, setting all of the switches into their first configurations so that all of the first terminals of the capacitors are coupled to the first conductive line at the first reference voltage.