Patent ID: 11955983
Assignee: NORDIC SEMICONDUCTOR ASA
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An analog to digital conversion method, comprising:
sampling an analog signal with an input sampling capacitor;
using an amplifier and a gain-control capacitor, connected in feedback with the amplifier, to apply gain to the analog signal sampled by the input sampling capacitor;
converting the analog signal to a digital signal using a successive-approximation-register analog to digital converter (SAR-ADC); and
decoupling the gain-control capacitor from the input sampling capacitor and feeding a residue voltage from the analog to digital converter back to the gain-control capacitor, such that the level of the analog signal, after gain is applied, is determined, at least in part, by a residue voltage previously received onto the gain-control capacitor.