Patent ID: 11942959
Assignee: INFINEON TECHNOLOGIES AG
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A calibration circuit for calibrating an Analog-to-Digital Converter (ADC), comprising:
a processor configured to generate a digital input word;
a signal generator circuit connected to the processor, the signal generator circuit being configured to generate an analog input signal based on the digital input word;
the ADC, which is configured to convert an analog reference signal to a digital calibration word, wherein the analog reference signal is a low-pass-filtered version of the analog input signal generated by the signal generator circuit; and
a feedback circuit configured to output a digital feedback signal to the processor, wherein the digital feedback signal is based on the analog input signal, and
wherein the signal generator circuit, the ADC, and the feedback circuit are provided on a same chip, and
wherein the processor is configured to, after the calibration, generate using the ADC the digital input word based on an analog signal while compensating for non-linear errors in the ADC using the digital calibration word.