Adc circuitry comprising compensation circuitry

Abstract

Analogue-to-digital converter, ADC, circuitry comprising: successive-approximation circuitry configured in a subconversion operation to draw a charge from a first voltage reference, REF1; compensation circuitry comprising at least one compensation capacitor and configured, in a precharge operation prior to the subconversion operation, to connect the at least one compensation capacitor so that the at least one compensation capacitor stores a compensation charge, and, in the subconversion operation, to connect the at least one compensation capacitor to the first voltage reference so that a charge is injected into the first voltage reference, REF1; and control circuitry, wherein: the successive-approximation circuitry and the compensation circuitry are configured such that one or more parameters defining at least one of said charges are controllable; and the control circuitry is configured to adjust at least one said parameter to adjust an extent to which the charge injected into the first voltage reference, REF1, by the compensation circuitry compensates for the charge drawn from the first voltage reference, REF1, by the successive-approximation circuitry.

Dependencies are inferred from the claim text.