METHOD AND SYSTEM FOR CALIBRATING ANALOG-TO-DIGITAL CONVERSION
2000 (English)Patent (Other (popular science, discussion, etc.))
A method and system enables ADCs to be calibrated from reference signals with unknown parameters. A given analog reference signal (i(s)(i(t))) is suplied to an ADC (310). The output (i(x)(i(k))) of the ADC (310) is used by calibration logic (320) to estimate at least one parameter of the reference signal (i(s)(i(t))). A FIR filter (455) accepts as input the i(x)(i(k)) signals and outputs an estimate (Å(i(k))) as the sampled instances of the i(s)(i(t)) signal. A reconstruction table (So,...,SM-1) is created that approximates the analog input signal in the digital domain using the knowledge of the analog input signal waveform type. The actual ADC outputs (i(x)(i(k))) are compared to the values in the reconstruction table (So,...,SM-1) to produce a correction table (350) for calibration. A continuous time reference signal may be utilized for training the correction table (350). The method and system is data adaptive, so it may be applied, for example, with any sinusoidal reference input.
Place, publisher, year, edition, pages
EP: US-A- 5 361 067 , 2000. Vol. 99958569.8, no EP 1133828 B1
IdentifiersURN: urn:nbn:se:kth:diva-83546OAI: oai:DiVA.org:kth-83546DiVA: diva2:498836
US 6407685-B1 (2002-06-18)
AU 769594 B2 (2004-01-29); EP 1133828 B1 (2006-03-15); CN 1290265 C (2006-12-13); JP 4596648-B2 (2010-12-08)2012-02-122012-02-122013-08-09Bibliographically approved